/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-60655ea [2020-09-14 12:51:10,947 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-14 12:51:10,951 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-14 12:51:11,001 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-14 12:51:11,001 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-14 12:51:11,013 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-14 12:51:11,014 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-14 12:51:11,017 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-14 12:51:11,021 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-14 12:51:11,023 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-14 12:51:11,024 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-14 12:51:11,028 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-14 12:51:11,029 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-14 12:51:11,032 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-14 12:51:11,035 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-14 12:51:11,037 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-14 12:51:11,038 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-14 12:51:11,040 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-14 12:51:11,042 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-14 12:51:11,050 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-14 12:51:11,052 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-14 12:51:11,053 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-14 12:51:11,055 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-14 12:51:11,055 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-14 12:51:11,061 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-14 12:51:11,061 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-14 12:51:11,061 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-14 12:51:11,064 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-14 12:51:11,065 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-14 12:51:11,067 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-14 12:51:11,068 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-14 12:51:11,068 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-14 12:51:11,069 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-14 12:51:11,070 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-14 12:51:11,072 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-14 12:51:11,072 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-14 12:51:11,073 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-14 12:51:11,073 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-14 12:51:11,074 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-14 12:51:11,075 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-14 12:51:11,076 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-14 12:51:11,077 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-09-14 12:51:11,128 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-14 12:51:11,128 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-14 12:51:11,131 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-14 12:51:11,131 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-14 12:51:11,131 INFO L138 SettingsManager]: * Use SBE=true [2020-09-14 12:51:11,131 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-14 12:51:11,131 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-14 12:51:11,132 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-14 12:51:11,132 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-14 12:51:11,132 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-14 12:51:11,133 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-14 12:51:11,133 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-14 12:51:11,134 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-14 12:51:11,134 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-14 12:51:11,134 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-14 12:51:11,134 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-14 12:51:11,135 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-14 12:51:11,135 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-14 12:51:11,135 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-14 12:51:11,135 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-14 12:51:11,135 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-14 12:51:11,136 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-14 12:51:11,136 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-14 12:51:11,136 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-14 12:51:11,136 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-14 12:51:11,137 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-14 12:51:11,137 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-14 12:51:11,137 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-14 12:51:11,137 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-14 12:51:11,137 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-14 12:51:11,566 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-14 12:51:11,582 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-14 12:51:11,589 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-14 12:51:11,591 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-14 12:51:11,591 INFO L275 PluginConnector]: CDTParser initialized [2020-09-14 12:51:11,593 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-14 12:51:11,683 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1447df156/03655f4ac0374839871e107e1b7c32bc/FLAGb2cee709f [2020-09-14 12:51:12,325 INFO L306 CDTParser]: Found 1 translation units. [2020-09-14 12:51:12,326 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-09-14 12:51:12,358 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1447df156/03655f4ac0374839871e107e1b7c32bc/FLAGb2cee709f [2020-09-14 12:51:12,592 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/1447df156/03655f4ac0374839871e107e1b7c32bc [2020-09-14 12:51:12,605 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-14 12:51:12,611 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-14 12:51:12,612 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-14 12:51:12,613 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-14 12:51:12,617 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-14 12:51:12,618 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,622 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7b353b2b and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:12, skipping insertion in model container [2020-09-14 12:51:12,622 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.09 12:51:12" (1/1) ... [2020-09-14 12:51:12,632 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-14 12:51:12,682 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-14 12:51:13,252 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:51:13,274 INFO L203 MainTranslator]: Completed pre-run [2020-09-14 12:51:13,348 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-14 12:51:13,430 INFO L208 MainTranslator]: Completed translation [2020-09-14 12:51:13,430 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13 WrapperNode [2020-09-14 12:51:13,431 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-14 12:51:13,432 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-14 12:51:13,432 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-14 12:51:13,432 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-14 12:51:13,448 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,469 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,497 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-14 12:51:13,497 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-14 12:51:13,497 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-14 12:51:13,497 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-14 12:51:13,507 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,508 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,512 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,512 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,519 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,526 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,529 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... [2020-09-14 12:51:13,532 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-14 12:51:13,533 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-14 12:51:13,533 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-14 12:51:13,533 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-14 12:51:13,535 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (1/1) ... No working directory specified, using /storage/repos/ultimate-2/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 [2020-09-14 12:51:13,615 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-14 12:51:13,615 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-14 12:51:13,616 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-14 12:51:13,616 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-14 12:51:13,616 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-14 12:51:13,617 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-14 12:51:13,617 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-14 12:51:13,618 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-14 12:51:13,618 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-14 12:51:13,619 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-14 12:51:13,619 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-14 12:51:13,622 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-14 12:51:13,951 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-14 12:51:13,952 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-14 12:51:13,958 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:51:13 BoogieIcfgContainer [2020-09-14 12:51:13,959 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-14 12:51:13,961 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-14 12:51:13,961 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-14 12:51:13,965 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-14 12:51:13,965 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.09 12:51:12" (1/3) ... [2020-09-14 12:51:13,966 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c2d1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:51:13, skipping insertion in model container [2020-09-14 12:51:13,966 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.09 12:51:13" (2/3) ... [2020-09-14 12:51:13,967 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@33c2d1c1 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.09 12:51:13, skipping insertion in model container [2020-09-14 12:51:13,967 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.09 12:51:13" (3/3) ... [2020-09-14 12:51:13,969 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-09-14 12:51:13,984 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-14 12:51:13,985 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-14 12:51:13,997 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-14 12:51:13,998 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-14 12:51:14,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,045 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,046 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,046 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,046 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,047 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,047 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,048 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,048 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,049 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,049 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,050 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,050 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,050 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,051 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,052 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,052 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,052 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,053 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,053 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,053 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,054 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,058 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,059 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,059 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,060 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,060 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,066 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,067 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,067 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,068 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,068 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,068 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-14 12:51:14,095 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-14 12:51:14,124 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-14 12:51:14,124 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-14 12:51:14,124 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-14 12:51:14,124 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-14 12:51:14,125 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-14 12:51:14,125 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-14 12:51:14,125 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-14 12:51:14,125 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-14 12:51:14,152 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:14,155 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:14,206 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-14 12:51:14,207 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:51:14,214 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-14 12:51:14,217 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-14 12:51:14,247 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-14 12:51:14,247 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-14 12:51:14,250 INFO L80 FinitePrefix]: Finished finitePrefix Result has 60 conditions, 53 events. 5/53 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 79 event pairs, 0 based on Foata normal form. 0/47 useless extension candidates. Maximal degree in co-relation 41. Up to 2 conditions per place. [2020-09-14 12:51:14,252 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-14 12:51:14,254 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-14 12:51:15,494 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-14 12:51:15,767 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-14 12:51:15,767 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-14 12:51:15,772 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-14 12:51:15,784 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-14 12:51:15,786 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-14 12:51:15,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-14 12:51:15,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:15,794 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-14 12:51:15,795 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:15,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:15,803 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-14 12:51:15,816 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:15,816 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851568835] [2020-09-14 12:51:15,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:15,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851568835] [2020-09-14 12:51:16,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:16,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-14 12:51:16,097 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4651544] [2020-09-14 12:51:16,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-14 12:51:16,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-14 12:51:16,123 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-14 12:51:16,126 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-14 12:51:16,204 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,204 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-14 12:51:16,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-14 12:51:16,207 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-14 12:51:16,207 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,223 INFO L225 Difference]: With dead ends: 75 [2020-09-14 12:51:16,224 INFO L226 Difference]: Without dead ends: 42 [2020-09-14 12:51:16,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:51:16,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-14 12:51:16,271 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-14 12:51:16,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:16,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-14 12:51:16,277 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-14 12:51:16,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,277 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-14 12:51:16,277 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-14 12:51:16,278 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-14 12:51:16,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-14 12:51:16,279 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,279 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:16,279 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-14 12:51:16,279 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:16,280 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:16,280 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-14 12:51:16,280 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:16,281 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251735446] [2020-09-14 12:51:16,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:16,311 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,386 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251735446] [2020-09-14 12:51:16,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:16,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-14 12:51:16,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016822663] [2020-09-14 12:51:16,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-14 12:51:16,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-14 12:51:16,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-14 12:51:16,390 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-14 12:51:16,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,425 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-14 12:51:16,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-14 12:51:16,425 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-14 12:51:16,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,427 INFO L225 Difference]: With dead ends: 56 [2020-09-14 12:51:16,427 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:51:16,428 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:16,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:51:16,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-14 12:51:16,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:16,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-14 12:51:16,437 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-14 12:51:16,438 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,438 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-14 12:51:16,438 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-14 12:51:16,439 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-14 12:51:16,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:16,439 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,440 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:16,440 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-14 12:51:16,440 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:16,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:16,441 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-14 12:51:16,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:16,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887284038] [2020-09-14 12:51:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:16,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,552 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887284038] [2020-09-14 12:51:16,553 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:16,554 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:16,554 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1534075609] [2020-09-14 12:51:16,555 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:16,555 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:16,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:16,556 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-14 12:51:16,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,657 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-14 12:51:16,659 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:16,659 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:16,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,661 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:16,661 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:16,661 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:16,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:16,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-14 12:51:16,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:16,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:16,677 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-14 12:51:16,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,677 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:16,678 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:16,678 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:16,678 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:16,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,681 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:16,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-14 12:51:16,682 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:16,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:16,682 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-14 12:51:16,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:16,683 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145445849] [2020-09-14 12:51:16,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:16,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,795 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145445849] [2020-09-14 12:51:16,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:16,796 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:16,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633913064] [2020-09-14 12:51:16,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:16,797 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:16,797 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-14 12:51:16,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:16,872 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-14 12:51:16,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:51:16,872 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:16,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:16,873 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:16,874 INFO L226 Difference]: Without dead ends: 43 [2020-09-14 12:51:16,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:16,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-14 12:51:16,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-14 12:51:16,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-14 12:51:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-14 12:51:16,880 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-14 12:51:16,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:16,880 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-14 12:51:16,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:16,880 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-14 12:51:16,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-14 12:51:16,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:16,881 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:16,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-14 12:51:16,882 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:16,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:16,882 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-14 12:51:16,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:16,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1547793124] [2020-09-14 12:51:16,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:16,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:16,963 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:16,965 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1547793124] [2020-09-14 12:51:16,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-14 12:51:16,965 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-14 12:51:16,969 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036507773] [2020-09-14 12:51:16,969 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-14 12:51:16,970 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:16,970 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-14 12:51:16,970 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-14 12:51:16,970 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-14 12:51:17,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:17,069 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-14 12:51:17,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-14 12:51:17,070 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-14 12:51:17,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:17,071 INFO L225 Difference]: With dead ends: 57 [2020-09-14 12:51:17,071 INFO L226 Difference]: Without dead ends: 51 [2020-09-14 12:51:17,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:17,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-14 12:51:17,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-14 12:51:17,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-14 12:51:17,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-14 12:51:17,078 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-14 12:51:17,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:17,078 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-14 12:51:17,079 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-14 12:51:17,079 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-14 12:51:17,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:17,080 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:17,080 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:17,080 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-14 12:51:17,080 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:17,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:17,081 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-14 12:51:17,081 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:17,081 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283871125] [2020-09-14 12:51:17,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:17,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:17,157 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,157 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283871125] [2020-09-14 12:51:17,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607219856] [2020-09-14 12:51:17,171 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:17,244 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:17,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:17,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:17,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:17,300 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:17,319 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,320 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:17,320 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:17,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110856129] [2020-09-14 12:51:17,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:17,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:17,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:17,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:17,322 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-14 12:51:17,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:17,453 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-14 12:51:17,454 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:17,454 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:17,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:17,455 INFO L225 Difference]: With dead ends: 48 [2020-09-14 12:51:17,456 INFO L226 Difference]: Without dead ends: 43 [2020-09-14 12:51:17,458 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:17,459 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-14 12:51:17,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-14 12:51:17,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-14 12:51:17,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-14 12:51:17,466 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-14 12:51:17,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:17,467 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-14 12:51:17,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:17,467 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-14 12:51:17,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:17,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:17,468 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:17,669 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-14 12:51:17,669 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:17,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:17,670 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-14 12:51:17,671 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:17,671 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275360685] [2020-09-14 12:51:17,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:17,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:17,767 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275360685] [2020-09-14 12:51:17,768 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1074177717] [2020-09-14 12:51:17,768 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:17,827 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:17,827 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:17,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:17,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:17,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:17,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:17,858 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-14 12:51:17,859 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1799017917] [2020-09-14 12:51:17,860 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-14 12:51:17,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:17,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-14 12:51:17,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:51:17,861 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-14 12:51:17,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:17,945 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-14 12:51:17,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-14 12:51:17,946 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-14 12:51:17,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:17,947 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:17,947 INFO L226 Difference]: Without dead ends: 48 [2020-09-14 12:51:17,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:17,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-14 12:51:17,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-14 12:51:17,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:17,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-14 12:51:17,953 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-14 12:51:17,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:17,954 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-14 12:51:17,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-14 12:51:17,954 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-14 12:51:17,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:17,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:17,955 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:18,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:18,167 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:18,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:18,167 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-14 12:51:18,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:18,169 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [17382517] [2020-09-14 12:51:18,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:18,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:18,283 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [17382517] [2020-09-14 12:51:18,283 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537289018] [2020-09-14 12:51:18,284 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:18,334 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:51:18,334 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:18,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:18,340 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:18,357 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:18,379 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:18,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:18,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932933395] [2020-09-14 12:51:18,380 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:18,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:18,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:18,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:18,381 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-14 12:51:18,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:18,510 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-14 12:51:18,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-14 12:51:18,511 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:18,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:18,512 INFO L225 Difference]: With dead ends: 58 [2020-09-14 12:51:18,512 INFO L226 Difference]: Without dead ends: 52 [2020-09-14 12:51:18,513 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:18,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-14 12:51:18,518 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-14 12:51:18,518 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-14 12:51:18,519 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-14 12:51:18,519 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-14 12:51:18,519 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:18,520 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-14 12:51:18,520 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:18,520 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-14 12:51:18,520 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:18,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:18,521 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:18,734 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:18,735 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:18,735 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:18,735 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-14 12:51:18,736 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:18,736 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246488639] [2020-09-14 12:51:18,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:18,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:18,838 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246488639] [2020-09-14 12:51:18,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1612452628] [2020-09-14 12:51:18,839 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:18,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:18,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:18,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:18,913 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:18,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:18,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-14 12:51:18,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120308987] [2020-09-14 12:51:18,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-14 12:51:18,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:18,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-14 12:51:18,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-14 12:51:18,915 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-14 12:51:19,055 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,056 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-14 12:51:19,056 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:19,056 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-14 12:51:19,057 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,058 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:19,058 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:51:19,058 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:19,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:51:19,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-14 12:51:19,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:19,065 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-14 12:51:19,065 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-14 12:51:19,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,065 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-14 12:51:19,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-14 12:51:19,066 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-14 12:51:19,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-14 12:51:19,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,067 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,280 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:19,281 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,281 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-14 12:51:19,282 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444997591] [2020-09-14 12:51:19,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,363 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,363 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444997591] [2020-09-14 12:51:19,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289042993] [2020-09-14 12:51:19,364 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:19,413 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:19,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:19,414 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-14 12:51:19,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:19,439 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:19,453 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:19,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-14 12:51:19,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [495799172] [2020-09-14 12:51:19,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:19,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:19,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:19,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:19,455 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-14 12:51:19,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:19,667 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-14 12:51:19,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:19,668 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-14 12:51:19,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:19,669 INFO L225 Difference]: With dead ends: 62 [2020-09-14 12:51:19,669 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:19,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:19,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:19,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-14 12:51:19,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-14 12:51:19,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-14 12:51:19,675 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-14 12:51:19,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:19,676 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-14 12:51:19,676 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:19,676 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-14 12:51:19,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:19,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:19,677 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:19,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-14 12:51:19,883 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:19,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:19,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-14 12:51:19,884 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:19,884 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559004169] [2020-09-14 12:51:19,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:19,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:19,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:19,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559004169] [2020-09-14 12:51:19,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934435972] [2020-09-14 12:51:19,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:20,026 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-14 12:51:20,026 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:20,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:20,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:20,049 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:20,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-14 12:51:20,050 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [86279391] [2020-09-14 12:51:20,050 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:20,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:20,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:20,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:20,051 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-14 12:51:20,183 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:20,184 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-14 12:51:20,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:51:20,184 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-14 12:51:20,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:20,185 INFO L225 Difference]: With dead ends: 64 [2020-09-14 12:51:20,185 INFO L226 Difference]: Without dead ends: 58 [2020-09-14 12:51:20,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:20,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-14 12:51:20,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-14 12:51:20,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-14 12:51:20,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-14 12:51:20,193 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-14 12:51:20,194 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:20,194 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-14 12:51:20,194 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:20,194 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-14 12:51:20,195 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:20,199 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:20,199 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:20,401 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:20,402 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:20,402 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:20,402 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-14 12:51:20,403 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:20,403 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1381818257] [2020-09-14 12:51:20,403 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:20,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:20,537 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1381818257] [2020-09-14 12:51:20,538 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [23152562] [2020-09-14 12:51:20,538 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:20,595 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:20,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:20,620 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:20,634 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:20,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:20,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:20,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438512088] [2020-09-14 12:51:20,636 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:20,636 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:20,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:20,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:20,637 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-14 12:51:20,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:20,841 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-14 12:51:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:20,842 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:20,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:20,843 INFO L225 Difference]: With dead ends: 61 [2020-09-14 12:51:20,843 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:20,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:51:20,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:20,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-14 12:51:20,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-14 12:51:20,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-14 12:51:20,849 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-14 12:51:20,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:20,849 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-14 12:51:20,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:20,849 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-14 12:51:20,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:20,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:20,850 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:21,062 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:21,063 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:21,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:21,064 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-14 12:51:21,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:21,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498231406] [2020-09-14 12:51:21,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:21,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,143 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498231406] [2020-09-14 12:51:21,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728155118] [2020-09-14 12:51:21,144 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:21,201 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:21,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:21,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:21,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:21,226 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:21,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-14 12:51:21,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090675257] [2020-09-14 12:51:21,227 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-14 12:51:21,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:21,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-14 12:51:21,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-14 12:51:21,228 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-14 12:51:21,374 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:21,374 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-14 12:51:21,375 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:21,375 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-14 12:51:21,375 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:21,376 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:21,376 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:21,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:21,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:21,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-14 12:51:21,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-14 12:51:21,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-14 12:51:21,381 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-14 12:51:21,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:21,382 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-14 12:51:21,382 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-14 12:51:21,382 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-14 12:51:21,383 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:21,383 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:21,383 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:21,596 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-14 12:51:21,597 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:21,597 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:21,597 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-14 12:51:21,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:21,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716684609] [2020-09-14 12:51:21,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:21,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:21,668 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716684609] [2020-09-14 12:51:21,669 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1460514623] [2020-09-14 12:51:21,669 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:21,719 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-14 12:51:21,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:21,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:21,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:21,741 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:21,750 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:21,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:21,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:21,751 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1678781568] [2020-09-14 12:51:21,751 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:21,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:21,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:21,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:21,752 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-14 12:51:22,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:22,061 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-14 12:51:22,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:22,062 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:22,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:22,063 INFO L225 Difference]: With dead ends: 58 [2020-09-14 12:51:22,063 INFO L226 Difference]: Without dead ends: 50 [2020-09-14 12:51:22,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:22,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-14 12:51:22,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-14 12:51:22,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-14 12:51:22,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-14 12:51:22,074 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-14 12:51:22,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:22,075 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-14 12:51:22,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:22,075 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-14 12:51:22,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-14 12:51:22,081 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:22,081 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:22,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:22,293 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:22,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:22,294 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-14 12:51:22,294 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:22,294 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109521258] [2020-09-14 12:51:22,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:22,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:22,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109521258] [2020-09-14 12:51:22,362 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243092205] [2020-09-14 12:51:22,363 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:22,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:22,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-14 12:51:22,440 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:22,464 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:22,482 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:22,482 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:22,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-14 12:51:22,483 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223292984] [2020-09-14 12:51:22,483 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:22,484 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:22,484 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:22,484 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:22,484 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-14 12:51:22,686 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:22,686 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-14 12:51:22,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:22,686 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-14 12:51:22,687 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:22,687 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:22,687 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:22,688 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:22,688 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:22,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-14 12:51:22,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:22,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:22,697 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-14 12:51:22,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:22,697 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:22,698 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:22,698 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:22,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:22,698 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:22,699 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:22,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-14 12:51:22,911 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:22,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:22,912 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-14 12:51:22,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:22,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [899810302] [2020-09-14 12:51:22,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:22,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:23,000 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [899810302] [2020-09-14 12:51:23,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170229643] [2020-09-14 12:51:23,001 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:23,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:23,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:23,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:23,071 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:23,114 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:23,132 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,132 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:23,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:23,133 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030944610] [2020-09-14 12:51:23,135 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:23,135 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:23,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:23,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:23,136 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-14 12:51:23,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:23,351 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-14 12:51:23,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:23,352 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:23,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:23,353 INFO L225 Difference]: With dead ends: 54 [2020-09-14 12:51:23,353 INFO L226 Difference]: Without dead ends: 49 [2020-09-14 12:51:23,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:23,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-14 12:51:23,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-14 12:51:23,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-14 12:51:23,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-14 12:51:23,356 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-14 12:51:23,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:23,357 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-14 12:51:23,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:23,357 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-14 12:51:23,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:23,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:23,358 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:23,567 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-14 12:51:23,567 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:23,567 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:23,568 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-14 12:51:23,568 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:23,568 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245936953] [2020-09-14 12:51:23,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:23,581 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:23,677 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245936953] [2020-09-14 12:51:23,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [977409931] [2020-09-14 12:51:23,678 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:23,750 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:23,750 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:23,751 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:23,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:23,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:23,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:23,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:23,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611417536] [2020-09-14 12:51:23,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:23,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:23,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:23,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:23,795 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-14 12:51:23,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:23,908 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-14 12:51:23,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-14 12:51:23,909 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:23,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:23,909 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:23,909 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:23,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:23,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:23,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-14 12:51:23,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:23,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-14 12:51:23,914 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-14 12:51:23,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:23,915 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-14 12:51:23,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:23,915 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-14 12:51:23,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:23,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:23,916 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:24,125 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-14 12:51:24,125 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:24,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:24,126 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-14 12:51:24,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:24,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [101499569] [2020-09-14 12:51:24,127 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:24,138 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,213 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [101499569] [2020-09-14 12:51:24,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465552046] [2020-09-14 12:51:24,214 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:24,265 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:24,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:24,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:24,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:24,284 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:24,298 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,300 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:24,300 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:24,302 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1886970221] [2020-09-14 12:51:24,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:24,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:24,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:24,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:24,304 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-14 12:51:24,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:24,453 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-14 12:51:24,453 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-14 12:51:24,454 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:24,454 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:24,454 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:24,455 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:24,455 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=168, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:51:24,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:24,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-14 12:51:24,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-14 12:51:24,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-14 12:51:24,458 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-14 12:51:24,458 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:24,458 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-14 12:51:24,458 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:24,458 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-14 12:51:24,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:24,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:24,461 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:24,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-14 12:51:24,662 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:24,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:24,663 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-14 12:51:24,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:24,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771144625] [2020-09-14 12:51:24,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:24,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:24,761 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771144625] [2020-09-14 12:51:24,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812961678] [2020-09-14 12:51:24,762 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:24,821 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:51:24,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:24,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:24,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:24,847 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:24,848 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:24,848 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:24,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [450421245] [2020-09-14 12:51:24,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:24,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:24,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:24,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:24,852 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-14 12:51:25,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:25,077 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-14 12:51:25,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:25,078 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:25,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:25,078 INFO L225 Difference]: With dead ends: 67 [2020-09-14 12:51:25,078 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:25,079 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:51:25,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:25,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-14 12:51:25,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-14 12:51:25,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-14 12:51:25,082 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-14 12:51:25,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:25,082 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-14 12:51:25,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:25,082 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-14 12:51:25,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:25,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:25,083 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:25,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:25,284 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:25,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-14 12:51:25,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:25,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [37895931] [2020-09-14 12:51:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:25,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [37895931] [2020-09-14 12:51:25,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [891179162] [2020-09-14 12:51:25,370 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:25,429 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:51:25,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:25,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:25,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:25,459 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:25,472 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:25,473 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:25,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:25,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966910805] [2020-09-14 12:51:25,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:25,474 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:25,474 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:25,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:25,474 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-14 12:51:25,733 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:25,733 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-14 12:51:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:25,733 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:25,734 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:25,734 INFO L225 Difference]: With dead ends: 69 [2020-09-14 12:51:25,734 INFO L226 Difference]: Without dead ends: 63 [2020-09-14 12:51:25,735 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-14 12:51:25,737 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-14 12:51:25,737 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-14 12:51:25,738 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-14 12:51:25,738 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:25,738 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-14 12:51:25,738 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:25,738 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-14 12:51:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:25,739 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:25,739 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:25,947 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:25,947 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:25,948 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:25,948 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-14 12:51:25,948 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:25,949 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [865558574] [2020-09-14 12:51:25,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:25,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:26,036 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [865558574] [2020-09-14 12:51:26,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733778722] [2020-09-14 12:51:26,036 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:26,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:26,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:26,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:26,099 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:26,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-14 12:51:26,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612771001] [2020-09-14 12:51:26,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-14 12:51:26,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:26,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-14 12:51:26,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-14 12:51:26,101 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-14 12:51:26,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:26,348 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-14 12:51:26,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:26,350 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-14 12:51:26,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:26,351 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:51:26,351 INFO L226 Difference]: Without dead ends: 82 [2020-09-14 12:51:26,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:26,354 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-14 12:51:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-14 12:51:26,356 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:26,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-14 12:51:26,357 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-14 12:51:26,357 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:26,357 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-14 12:51:26,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-14 12:51:26,357 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-14 12:51:26,358 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-14 12:51:26,359 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:26,359 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:26,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:26,568 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-14 12:51:26,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:26,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324506304] [2020-09-14 12:51:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:26,644 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324506304] [2020-09-14 12:51:26,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [815932154] [2020-09-14 12:51:26,645 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:26,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:26,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:26,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-14 12:51:26,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:26,725 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:26,738 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:26,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:26,739 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-14 12:51:26,739 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [69104005] [2020-09-14 12:51:26,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:26,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:26,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:26,741 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:26,741 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-14 12:51:27,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:27,033 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-14 12:51:27,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:27,034 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-14 12:51:27,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:27,035 INFO L225 Difference]: With dead ends: 69 [2020-09-14 12:51:27,035 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:27,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:27,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:27,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-14 12:51:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-14 12:51:27,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-14 12:51:27,039 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-14 12:51:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:27,039 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-14 12:51:27,039 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:27,039 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-14 12:51:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:27,041 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:27,041 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:27,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-14 12:51:27,250 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:27,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:27,251 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-14 12:51:27,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:27,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49444485] [2020-09-14 12:51:27,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:27,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:27,401 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49444485] [2020-09-14 12:51:27,401 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506039526] [2020-09-14 12:51:27,402 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:27,458 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:27,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:27,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:27,459 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:27,474 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:27,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:27,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:27,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [633955879] [2020-09-14 12:51:27,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:27,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:27,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:27,476 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:27,476 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-14 12:51:27,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:27,655 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-14 12:51:27,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:27,656 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:27,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:27,657 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:27,657 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:27,657 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:51:27,658 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:27,660 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-14 12:51:27,660 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:27,660 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:27,661 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-14 12:51:27,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:27,662 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:27,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:27,662 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:27,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:27,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:27,663 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:27,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-14 12:51:27,872 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:27,872 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:27,873 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-14 12:51:27,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:27,873 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521629970] [2020-09-14 12:51:27,873 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:27,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:28,002 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521629970] [2020-09-14 12:51:28,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [280273533] [2020-09-14 12:51:28,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:28,067 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:28,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:28,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:28,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:28,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:28,109 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:28,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:28,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1300792359] [2020-09-14 12:51:28,110 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:28,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:28,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:28,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:28,111 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-14 12:51:28,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:28,323 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-14 12:51:28,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:28,324 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:28,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:28,325 INFO L225 Difference]: With dead ends: 71 [2020-09-14 12:51:28,325 INFO L226 Difference]: Without dead ends: 65 [2020-09-14 12:51:28,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:28,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-14 12:51:28,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-14 12:51:28,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:28,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:28,329 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-14 12:51:28,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:28,329 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:28,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:28,329 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:28,330 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:28,330 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:28,541 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-14 12:51:28,541 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:28,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:28,542 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-14 12:51:28,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:28,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774652752] [2020-09-14 12:51:28,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:28,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:28,633 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774652752] [2020-09-14 12:51:28,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [250556636] [2020-09-14 12:51:28,633 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:28,690 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-14 12:51:28,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:28,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:28,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:28,716 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:28,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:28,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:28,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430028601] [2020-09-14 12:51:28,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:28,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:28,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:28,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:28,718 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-14 12:51:28,939 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:28,939 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-14 12:51:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:28,940 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:28,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:28,941 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:28,941 INFO L226 Difference]: Without dead ends: 62 [2020-09-14 12:51:28,942 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:51:28,942 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-14 12:51:28,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-14 12:51:28,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:28,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:28,946 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-14 12:51:28,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:28,946 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:28,946 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:28,946 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:28,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:28,947 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:28,947 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:29,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-14 12:51:29,157 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:29,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:29,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-14 12:51:29,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:29,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1281320323] [2020-09-14 12:51:29,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:29,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:29,258 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1281320323] [2020-09-14 12:51:29,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1095384614] [2020-09-14 12:51:29,259 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:29,313 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-14 12:51:29,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:29,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:29,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:29,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:29,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:29,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:29,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314419586] [2020-09-14 12:51:29,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:29,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:29,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:29,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:29,373 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-14 12:51:29,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:29,701 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-14 12:51:29,701 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:29,702 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:29,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:29,702 INFO L225 Difference]: With dead ends: 67 [2020-09-14 12:51:29,702 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:29,703 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 76 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=140, Invalid=322, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:51:29,703 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:29,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-14 12:51:29,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:29,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:29,706 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-14 12:51:29,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:29,706 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:29,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:29,706 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:29,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:29,707 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:29,707 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:29,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-14 12:51:29,915 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:29,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:29,916 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-14 12:51:29,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:29,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1537350590] [2020-09-14 12:51:29,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:29,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:29,996 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:29,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1537350590] [2020-09-14 12:51:29,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743388088] [2020-09-14 12:51:29,997 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:30,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:30,053 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:30,054 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:30,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:30,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-14 12:51:30,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118070096] [2020-09-14 12:51:30,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-14 12:51:30,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:30,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-14 12:51:30,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-14 12:51:30,075 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-14 12:51:30,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:30,335 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-14 12:51:30,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:30,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-14 12:51:30,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:30,337 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:30,337 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:30,337 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:30,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:30,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-14 12:51:30,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:30,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-14 12:51:30,341 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-14 12:51:30,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:30,341 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-14 12:51:30,341 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-14 12:51:30,341 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-14 12:51:30,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:30,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:30,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:30,548 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:30,549 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:30,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:30,549 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-14 12:51:30,550 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:30,550 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [9297396] [2020-09-14 12:51:30,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:30,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:30,638 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [9297396] [2020-09-14 12:51:30,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124289561] [2020-09-14 12:51:30,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:30,685 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:30,686 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:30,687 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:30,688 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:30,722 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:30,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:30,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:30,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950386690] [2020-09-14 12:51:30,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:30,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:30,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:30,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:30,724 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-14 12:51:31,048 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:31,048 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-14 12:51:31,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:31,049 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:31,049 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:31,050 INFO L225 Difference]: With dead ends: 62 [2020-09-14 12:51:31,050 INFO L226 Difference]: Without dead ends: 54 [2020-09-14 12:51:31,050 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:51:31,051 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-14 12:51:31,052 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-14 12:51:31,052 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-14 12:51:31,052 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-14 12:51:31,053 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-14 12:51:31,053 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:31,053 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-14 12:51:31,053 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:31,053 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-14 12:51:31,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-14 12:51:31,053 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:31,054 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:31,254 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-14 12:51:31,255 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:31,255 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:31,255 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-14 12:51:31,256 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:31,256 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1762945578] [2020-09-14 12:51:31,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:31,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:31,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1762945578] [2020-09-14 12:51:31,349 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [723776769] [2020-09-14 12:51:31,349 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:31,402 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-14 12:51:31,402 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:31,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-14 12:51:31,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:31,426 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:31,445 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:31,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:31,446 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-14 12:51:31,446 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1912283539] [2020-09-14 12:51:31,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:31,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:31,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:31,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:31,447 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-14 12:51:31,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:31,761 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-14 12:51:31,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:31,762 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-14 12:51:31,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:31,762 INFO L225 Difference]: With dead ends: 68 [2020-09-14 12:51:31,762 INFO L226 Difference]: Without dead ends: 63 [2020-09-14 12:51:31,763 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:31,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-14 12:51:31,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-14 12:51:31,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:31,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-14 12:51:31,766 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-14 12:51:31,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:31,766 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-14 12:51:31,766 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:31,766 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-14 12:51:31,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:31,767 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:31,767 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:31,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-14 12:51:31,976 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:31,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:31,977 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-14 12:51:31,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:31,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1845097281] [2020-09-14 12:51:31,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:31,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1845097281] [2020-09-14 12:51:32,066 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2141189663] [2020-09-14 12:51:32,066 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:32,124 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:32,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:32,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:32,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:32,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:32,166 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,167 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:32,167 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:32,167 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951754299] [2020-09-14 12:51:32,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:32,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:32,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:32,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:32,168 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-14 12:51:32,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:32,551 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-14 12:51:32,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:32,557 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:32,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:32,558 INFO L225 Difference]: With dead ends: 60 [2020-09-14 12:51:32,558 INFO L226 Difference]: Without dead ends: 55 [2020-09-14 12:51:32,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:32,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-14 12:51:32,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-14 12:51:32,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-14 12:51:32,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-14 12:51:32,561 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-14 12:51:32,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:32,561 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-14 12:51:32,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:32,562 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-14 12:51:32,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:32,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:32,562 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:32,771 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:32,771 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:32,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:32,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-14 12:51:32,773 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:32,773 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [641121135] [2020-09-14 12:51:32,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:32,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:32,883 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [641121135] [2020-09-14 12:51:32,884 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874103103] [2020-09-14 12:51:32,884 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:32,969 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:32,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:32,970 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:32,971 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:32,984 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:32,984 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:32,984 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:32,984 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040217899] [2020-09-14 12:51:32,985 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:32,985 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:32,985 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:32,985 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:32,986 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-14 12:51:33,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:33,139 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-14 12:51:33,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-14 12:51:33,140 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:33,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:33,140 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:33,140 INFO L226 Difference]: Without dead ends: 60 [2020-09-14 12:51:33,141 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:51:33,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-14 12:51:33,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-14 12:51:33,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:33,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-14 12:51:33,143 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-14 12:51:33,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:33,144 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-14 12:51:33,144 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:33,144 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-14 12:51:33,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:33,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:33,144 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:33,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:33,347 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:33,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:33,348 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-14 12:51:33,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:33,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453835033] [2020-09-14 12:51:33,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:33,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:33,458 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:33,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453835033] [2020-09-14 12:51:33,458 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161092820] [2020-09-14 12:51:33,458 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:33,512 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:33,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:33,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:33,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:33,532 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:33,552 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:33,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:33,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:33,553 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [236706627] [2020-09-14 12:51:33,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:33,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:33,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:33,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:33,554 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-14 12:51:33,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:33,786 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-14 12:51:33,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:51:33,786 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:33,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:33,787 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:33,787 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:33,789 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:51:33,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:33,791 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-14 12:51:33,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-14 12:51:33,792 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-14 12:51:33,792 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-14 12:51:33,792 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:33,792 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-14 12:51:33,792 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:33,793 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-14 12:51:33,793 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:33,793 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:33,793 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:34,001 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-14 12:51:34,001 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:34,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:34,002 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-14 12:51:34,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:34,002 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257213448] [2020-09-14 12:51:34,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:34,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,108 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257213448] [2020-09-14 12:51:34,108 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1104282357] [2020-09-14 12:51:34,108 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:34,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:34,160 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:34,177 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,178 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:34,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:34,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [728177261] [2020-09-14 12:51:34,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:34,179 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:34,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:34,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:34,179 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-14 12:51:34,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:34,433 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-14 12:51:34,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:34,433 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:34,434 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:34,434 INFO L225 Difference]: With dead ends: 75 [2020-09-14 12:51:34,435 INFO L226 Difference]: Without dead ends: 69 [2020-09-14 12:51:34,435 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:34,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-14 12:51:34,438 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-14 12:51:34,438 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-14 12:51:34,438 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-14 12:51:34,439 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-14 12:51:34,439 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:34,439 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-14 12:51:34,439 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:34,439 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-14 12:51:34,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:34,440 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:34,440 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:34,650 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:34,650 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:34,651 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:34,651 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-14 12:51:34,651 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:34,651 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [103424042] [2020-09-14 12:51:34,652 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:34,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:34,749 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [103424042] [2020-09-14 12:51:34,749 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2145500227] [2020-09-14 12:51:34,749 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:34,826 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:34,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:34,828 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:34,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:34,854 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:34,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:34,874 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:34,874 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:34,874 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545208705] [2020-09-14 12:51:34,875 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:34,875 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:34,875 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:34,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:34,876 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-14 12:51:35,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:35,201 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-14 12:51:35,201 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:35,201 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:35,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:35,202 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:51:35,203 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:51:35,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:51:35,204 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:51:35,206 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-14 12:51:35,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:51:35,207 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-14 12:51:35,207 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-14 12:51:35,207 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:35,208 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-14 12:51:35,208 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:35,208 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-14 12:51:35,208 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:35,209 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:35,209 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:35,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-14 12:51:35,421 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:35,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:35,422 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-14 12:51:35,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:35,423 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [348843362] [2020-09-14 12:51:35,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:35,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:35,541 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [348843362] [2020-09-14 12:51:35,542 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1682268383] [2020-09-14 12:51:35,542 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:35,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:35,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:35,630 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:35,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:35,657 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:35,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:35,658 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:35,660 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [270158031] [2020-09-14 12:51:35,660 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:35,660 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:35,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:35,661 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-14 12:51:35,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:35,998 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-14 12:51:35,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:35,999 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:36,000 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:36,000 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:51:36,001 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:51:36,001 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:36,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:51:36,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-14 12:51:36,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-14 12:51:36,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-14 12:51:36,005 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-14 12:51:36,005 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:36,006 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-14 12:51:36,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:36,006 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-14 12:51:36,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:36,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:36,007 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:36,218 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:36,218 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:36,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:36,219 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-14 12:51:36,219 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:36,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [927575727] [2020-09-14 12:51:36,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:36,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:36,325 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:36,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [927575727] [2020-09-14 12:51:36,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668618979] [2020-09-14 12:51:36,326 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:36,372 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:36,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:36,373 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:36,374 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:36,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:36,405 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:36,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:36,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:36,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [610762577] [2020-09-14 12:51:36,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:36,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:36,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:36,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:36,407 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-14 12:51:36,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:36,792 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-14 12:51:36,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:36,792 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:36,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:36,793 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:51:36,794 INFO L226 Difference]: Without dead ends: 70 [2020-09-14 12:51:36,794 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:36,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-14 12:51:36,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-14 12:51:36,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:36,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-14 12:51:36,798 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-14 12:51:36,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:36,798 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-14 12:51:36,799 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:36,799 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-14 12:51:36,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:36,799 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:36,800 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:37,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-14 12:51:37,000 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:37,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:37,001 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-14 12:51:37,001 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:37,001 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2074923434] [2020-09-14 12:51:37,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:37,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,116 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2074923434] [2020-09-14 12:51:37,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707511284] [2020-09-14 12:51:37,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:37,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:37,188 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:37,189 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:37,190 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:37,215 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,216 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:37,216 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-14 12:51:37,216 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1609736690] [2020-09-14 12:51:37,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-14 12:51:37,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:37,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-14 12:51:37,218 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-14 12:51:37,218 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-14 12:51:37,528 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:37,528 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-14 12:51:37,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:37,528 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-14 12:51:37,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:37,529 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:51:37,529 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:51:37,530 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:51:37,530 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:51:37,532 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-14 12:51:37,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:37,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-14 12:51:37,533 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-14 12:51:37,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:37,533 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-14 12:51:37,534 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-14 12:51:37,534 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-14 12:51:37,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-14 12:51:37,534 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:37,534 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:37,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-14 12:51:37,741 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:37,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:37,742 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-14 12:51:37,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:37,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [484774109] [2020-09-14 12:51:37,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:37,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:37,834 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [484774109] [2020-09-14 12:51:37,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [679317702] [2020-09-14 12:51:37,835 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:37,890 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:37,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:37,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-14 12:51:37,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:37,918 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:37,934 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:37,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:37,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-14 12:51:37,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280312083] [2020-09-14 12:51:37,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:37,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:37,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:37,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:37,936 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-14 12:51:38,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:38,397 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-14 12:51:38,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:38,398 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-14 12:51:38,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:38,399 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:38,399 INFO L226 Difference]: Without dead ends: 69 [2020-09-14 12:51:38,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:38,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-14 12:51:38,402 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-14 12:51:38,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:51:38,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-14 12:51:38,402 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-14 12:51:38,403 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:38,403 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-14 12:51:38,403 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:38,403 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-14 12:51:38,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:38,403 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:38,404 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:38,613 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-14 12:51:38,613 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:38,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:38,614 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-14 12:51:38,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:38,615 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1942462560] [2020-09-14 12:51:38,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:38,628 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:38,777 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1942462560] [2020-09-14 12:51:38,779 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1798164936] [2020-09-14 12:51:38,779 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:38,844 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:38,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:38,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:38,871 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:38,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:38,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:38,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319510640] [2020-09-14 12:51:38,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:38,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:38,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:38,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:38,873 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-14 12:51:39,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:39,063 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-14 12:51:39,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:39,064 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:39,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:39,065 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:39,065 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:39,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:51:39,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:39,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-14 12:51:39,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:39,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:39,069 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:39,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:39,070 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:39,070 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:39,070 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:39,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:39,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:39,071 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:39,281 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-14 12:51:39,281 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:39,282 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:39,282 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-14 12:51:39,283 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:39,283 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2050874282] [2020-09-14 12:51:39,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:39,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:39,426 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:39,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2050874282] [2020-09-14 12:51:39,427 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691188753] [2020-09-14 12:51:39,428 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:39,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:39,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:39,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:39,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:39,518 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:39,529 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:39,530 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:39,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:39,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113151671] [2020-09-14 12:51:39,530 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:39,530 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:39,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:39,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:39,531 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:39,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:39,814 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-14 12:51:39,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:39,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:39,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:39,816 INFO L225 Difference]: With dead ends: 81 [2020-09-14 12:51:39,816 INFO L226 Difference]: Without dead ends: 75 [2020-09-14 12:51:39,816 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:39,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-14 12:51:39,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-14 12:51:39,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:39,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:39,819 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:39,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:39,819 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:39,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:39,819 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:39,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:39,820 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:39,820 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:40,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-14 12:51:40,028 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:40,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:40,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-14 12:51:40,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:40,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1213075902] [2020-09-14 12:51:40,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:40,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1213075902] [2020-09-14 12:51:40,140 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1359388578] [2020-09-14 12:51:40,140 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:40,197 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:40,197 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:40,198 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:40,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:40,214 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,214 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:40,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:40,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [491900416] [2020-09-14 12:51:40,215 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:40,215 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:40,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:40,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:40,216 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:40,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:40,496 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-14 12:51:40,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:40,497 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:40,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:40,497 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:51:40,498 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:51:40,498 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 85 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:51:40,498 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:51:40,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-14 12:51:40,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:40,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:40,501 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:40,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:40,501 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:40,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:40,501 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:40,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:40,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:40,502 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:40,710 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-14 12:51:40,710 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:40,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:40,711 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-14 12:51:40,711 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:40,712 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [648831468] [2020-09-14 12:51:40,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:40,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:40,837 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [648831468] [2020-09-14 12:51:40,838 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81019308] [2020-09-14 12:51:40,838 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:40,906 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:40,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:40,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:40,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:40,928 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:40,939 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:40,939 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:40,939 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:40,939 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [427565393] [2020-09-14 12:51:40,940 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:40,940 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:40,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:40,940 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:40,941 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:41,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:41,303 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-14 12:51:41,304 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:41,304 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:41,305 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:41,305 INFO L225 Difference]: With dead ends: 77 [2020-09-14 12:51:41,306 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:41,306 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:51:41,307 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:41,309 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-14 12:51:41,309 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:41,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:41,310 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:41,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:41,311 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:41,311 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:41,313 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:41,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:41,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:41,314 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:41,524 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-14 12:51:41,524 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:41,524 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:41,525 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-14 12:51:41,525 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:41,525 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2114503726] [2020-09-14 12:51:41,525 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:41,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:41,636 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2114503726] [2020-09-14 12:51:41,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [13006916] [2020-09-14 12:51:41,637 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:41,684 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-14 12:51:41,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:41,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:41,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:41,707 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:41,708 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:41,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:41,710 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1161517325] [2020-09-14 12:51:41,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:41,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:41,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:41,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:41,711 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:42,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:42,008 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-14 12:51:42,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:42,008 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:42,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:42,009 INFO L225 Difference]: With dead ends: 74 [2020-09-14 12:51:42,009 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:51:42,009 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:42,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:51:42,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-14 12:51:42,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:42,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:42,013 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-14 12:51:42,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:42,013 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:42,013 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:42,013 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:42,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:42,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:42,014 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:42,222 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:42,222 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:42,223 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:42,223 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-14 12:51:42,223 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:42,223 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1157881140] [2020-09-14 12:51:42,224 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:42,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:42,332 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:42,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1157881140] [2020-09-14 12:51:42,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333785974] [2020-09-14 12:51:42,332 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:42,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-14 12:51:42,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:42,386 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:42,387 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:42,405 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:42,425 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:42,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:42,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:42,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872939030] [2020-09-14 12:51:42,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:42,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:42,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:42,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:42,427 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-14 12:51:42,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:42,904 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-14 12:51:42,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:42,905 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:42,905 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:42,906 INFO L225 Difference]: With dead ends: 73 [2020-09-14 12:51:42,906 INFO L226 Difference]: Without dead ends: 67 [2020-09-14 12:51:42,907 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:42,907 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-14 12:51:42,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-14 12:51:42,909 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:42,909 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:42,909 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-14 12:51:42,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:42,910 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:42,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:42,910 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:42,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:42,910 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:42,910 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:43,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-14 12:51:43,120 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:43,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:43,121 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-14 12:51:43,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:43,121 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421555180] [2020-09-14 12:51:43,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:43,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:43,218 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421555180] [2020-09-14 12:51:43,219 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1378230199] [2020-09-14 12:51:43,219 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:43,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:43,265 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:43,266 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:43,280 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,281 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:43,281 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-14 12:51:43,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [406009597] [2020-09-14 12:51:43,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-14 12:51:43,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:43,282 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-14 12:51:43,282 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-14 12:51:43,282 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-14 12:51:43,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:43,676 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-14 12:51:43,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:43,677 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-14 12:51:43,677 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:43,678 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:43,678 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:43,679 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:43,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:43,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-14 12:51:43,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-14 12:51:43,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-14 12:51:43,682 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-14 12:51:43,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:43,683 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-14 12:51:43,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-14 12:51:43,683 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-14 12:51:43,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:43,683 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:43,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:43,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:43,888 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:43,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:43,889 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-14 12:51:43,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:43,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1598987426] [2020-09-14 12:51:43,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:43,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:43,986 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:43,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1598987426] [2020-09-14 12:51:43,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773647106] [2020-09-14 12:51:43,987 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:44,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:44,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:44,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:44,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:44,066 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:44,077 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,078 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:44,078 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:44,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421461880] [2020-09-14 12:51:44,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:44,079 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:44,079 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:44,079 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:44,079 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-14 12:51:44,545 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:44,545 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-14 12:51:44,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:51:44,546 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:44,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:44,547 INFO L225 Difference]: With dead ends: 70 [2020-09-14 12:51:44,547 INFO L226 Difference]: Without dead ends: 62 [2020-09-14 12:51:44,548 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:44,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-14 12:51:44,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-14 12:51:44,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-14 12:51:44,550 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-14 12:51:44,550 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-14 12:51:44,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:44,551 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-14 12:51:44,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:44,551 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-14 12:51:44,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-14 12:51:44,551 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:44,552 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:44,761 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-14 12:51:44,761 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:44,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:44,762 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-14 12:51:44,762 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:44,763 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2133743125] [2020-09-14 12:51:44,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:44,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:44,869 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2133743125] [2020-09-14 12:51:44,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126146032] [2020-09-14 12:51:44,869 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:44,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-14 12:51:44,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:44,917 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:51:44,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:44,936 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:44,948 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:44,949 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:44,949 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-14 12:51:44,949 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109636023] [2020-09-14 12:51:44,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:44,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:44,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:44,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:44,950 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-14 12:51:45,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:45,355 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-14 12:51:45,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:45,366 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-14 12:51:45,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:45,366 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:51:45,367 INFO L226 Difference]: Without dead ends: 71 [2020-09-14 12:51:45,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:45,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-14 12:51:45,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-14 12:51:45,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:45,370 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-14 12:51:45,370 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-14 12:51:45,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:45,371 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-14 12:51:45,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:45,371 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-14 12:51:45,371 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:45,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:45,372 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:45,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:45,582 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:45,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:45,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-14 12:51:45,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:45,583 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2045410686] [2020-09-14 12:51:45,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:45,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:45,706 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,706 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2045410686] [2020-09-14 12:51:45,707 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133538031] [2020-09-14 12:51:45,707 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:45,754 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:45,755 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:45,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:45,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:45,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:51:45,790 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:45,790 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:45,790 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:45,791 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116345287] [2020-09-14 12:51:45,791 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:45,791 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:45,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:45,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:45,794 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-14 12:51:46,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:46,295 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-14 12:51:46,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:46,296 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:46,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:46,296 INFO L225 Difference]: With dead ends: 66 [2020-09-14 12:51:46,296 INFO L226 Difference]: Without dead ends: 61 [2020-09-14 12:51:46,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:46,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-14 12:51:46,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-14 12:51:46,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-14 12:51:46,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-14 12:51:46,299 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-14 12:51:46,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:46,300 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-14 12:51:46,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:46,300 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-14 12:51:46,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:46,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:46,300 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:46,509 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-14 12:51:46,510 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:46,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:46,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-14 12:51:46,510 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:46,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439291868] [2020-09-14 12:51:46,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:46,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:46,648 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439291868] [2020-09-14 12:51:46,649 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1492654115] [2020-09-14 12:51:46,649 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:46,706 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:46,706 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:46,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:46,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:46,728 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:46,729 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:46,729 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:46,729 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942666805] [2020-09-14 12:51:46,730 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:46,730 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:46,730 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:46,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:46,730 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-14 12:51:46,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:46,933 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-14 12:51:46,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-14 12:51:46,934 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:46,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:46,934 INFO L225 Difference]: With dead ends: 72 [2020-09-14 12:51:46,935 INFO L226 Difference]: Without dead ends: 66 [2020-09-14 12:51:46,935 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:51:46,935 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-14 12:51:46,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-14 12:51:46,937 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:46,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-14 12:51:46,939 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-14 12:51:46,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:46,940 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-14 12:51:46,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:46,940 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-14 12:51:46,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:46,940 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:46,940 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:47,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-14 12:51:47,149 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:47,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:47,150 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-14 12:51:47,150 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:47,150 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573725682] [2020-09-14 12:51:47,151 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:47,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:47,303 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573725682] [2020-09-14 12:51:47,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [886528336] [2020-09-14 12:51:47,305 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:47,376 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:47,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:47,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:47,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:47,400 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:47,420 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:47,420 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:47,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:47,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390677755] [2020-09-14 12:51:47,421 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:47,421 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:47,421 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:47,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:47,422 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-14 12:51:47,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:47,713 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-14 12:51:47,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-14 12:51:47,714 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:47,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:47,714 INFO L225 Difference]: With dead ends: 82 [2020-09-14 12:51:47,715 INFO L226 Difference]: Without dead ends: 76 [2020-09-14 12:51:47,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:51:47,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-14 12:51:47,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-14 12:51:47,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-14 12:51:47,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-14 12:51:47,718 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-14 12:51:47,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:47,719 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-14 12:51:47,719 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:47,719 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-14 12:51:47,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:47,720 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:47,720 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:47,934 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-14 12:51:47,934 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-14 12:51:47,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:47,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212953] [2020-09-14 12:51:47,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:47,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:48,102 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212953] [2020-09-14 12:51:48,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665780912] [2020-09-14 12:51:48,103 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:48,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:48,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:48,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:48,173 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,174 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:48,174 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:48,174 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [70334951] [2020-09-14 12:51:48,174 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:48,174 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:48,175 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:48,175 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:48,175 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-14 12:51:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:48,432 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-14 12:51:48,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:48,432 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:48,433 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:48,433 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:48,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:48,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:48,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-14 12:51:48,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-14 12:51:48,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-14 12:51:48,437 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-14 12:51:48,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:48,437 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-14 12:51:48,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:48,437 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-14 12:51:48,438 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:48,438 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:48,438 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:48,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-14 12:51:48,639 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:48,639 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:48,640 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-14 12:51:48,640 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:48,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582821798] [2020-09-14 12:51:48,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:48,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:48,771 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,771 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582821798] [2020-09-14 12:51:48,772 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1065727321] [2020-09-14 12:51:48,772 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:48,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:48,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:48,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:48,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:48,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:48,857 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:48,857 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:48,857 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:48,857 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1436630718] [2020-09-14 12:51:48,858 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:48,858 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:48,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:48,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:48,859 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-14 12:51:49,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:49,215 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-14 12:51:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:49,219 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:49,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:49,220 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:49,220 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:49,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:49,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:49,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-14 12:51:49,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:51:49,223 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-14 12:51:49,223 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-14 12:51:49,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:49,223 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-14 12:51:49,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:49,224 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-14 12:51:49,224 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:49,224 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:49,224 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:49,434 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:49,434 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:49,434 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:49,434 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-14 12:51:49,435 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:49,435 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383252067] [2020-09-14 12:51:49,435 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:49,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:49,557 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383252067] [2020-09-14 12:51:49,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117107080] [2020-09-14 12:51:49,558 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:49,613 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:51:49,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:49,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:49,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:49,638 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:49,638 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:49,638 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:49,639 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909257137] [2020-09-14 12:51:49,639 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:49,639 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:49,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:49,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:49,640 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-14 12:51:50,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:50,016 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-14 12:51:50,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:50,022 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:50,022 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:50,023 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:51:50,023 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:51:50,023 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:50,023 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:51:50,025 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-14 12:51:50,025 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:51:50,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-14 12:51:50,026 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-14 12:51:50,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:50,026 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-14 12:51:50,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:50,027 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-14 12:51:50,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:50,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:50,027 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:50,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:50,238 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:50,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:50,239 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-14 12:51:50,239 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:50,239 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [711659498] [2020-09-14 12:51:50,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:50,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:50,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,398 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [711659498] [2020-09-14 12:51:50,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1543761834] [2020-09-14 12:51:50,399 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:50,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:50,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:50,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:50,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:50,481 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:50,493 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:50,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:50,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:50,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1451830770] [2020-09-14 12:51:50,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:50,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:50,495 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:50,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:50,496 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-14 12:51:50,976 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:50,976 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-14 12:51:50,977 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:50,977 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:50,977 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:50,978 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:51:50,978 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:51:50,978 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:51:50,979 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:51:50,980 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-14 12:51:50,980 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:51:50,981 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-14 12:51:50,981 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-14 12:51:50,981 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:50,981 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-14 12:51:50,981 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:50,981 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-14 12:51:50,982 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:50,982 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:50,982 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:51,182 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-14 12:51:51,183 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:51,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:51,184 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-14 12:51:51,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:51,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346458363] [2020-09-14 12:51:51,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:51,193 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:51,317 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:51,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346458363] [2020-09-14 12:51:51,318 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1388374642] [2020-09-14 12:51:51,318 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:51,375 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:51,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:51,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:51,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:51,392 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:51,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:51,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:51,393 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347955508] [2020-09-14 12:51:51,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:51,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:51,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:51,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:51,394 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-14 12:51:51,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:51,817 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-14 12:51:51,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:51:51,818 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:51,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:51,819 INFO L225 Difference]: With dead ends: 87 [2020-09-14 12:51:51,819 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:51:51,820 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:51,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:51:51,822 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-14 12:51:51,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-14 12:51:51,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-14 12:51:51,823 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-14 12:51:51,823 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:51,823 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-14 12:51:51,823 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:51,823 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-14 12:51:51,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:51,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:51,824 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:52,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:52,032 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:52,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:52,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-14 12:51:52,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:52,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [544769069] [2020-09-14 12:51:52,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:52,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:52,170 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [544769069] [2020-09-14 12:51:52,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1400962709] [2020-09-14 12:51:52,171 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:52,226 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:52,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:52,227 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:52,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:52,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:52,260 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:52,260 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:52,260 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [839050945] [2020-09-14 12:51:52,261 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:52,262 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:52,262 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:52,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:52,263 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-14 12:51:52,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:52,817 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-14 12:51:52,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:51:52,817 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:52,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:52,818 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:52,819 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:52,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:51:52,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:52,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-14 12:51:52,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:51:52,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-14 12:51:52,822 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-14 12:51:52,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:52,822 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-14 12:51:52,822 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:52,823 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-14 12:51:52,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:52,823 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:52,823 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:53,034 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-14 12:51:53,034 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:53,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:53,035 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-14 12:51:53,035 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:53,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208375987] [2020-09-14 12:51:53,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:53,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:53,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208375987] [2020-09-14 12:51:53,141 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1075395275] [2020-09-14 12:51:53,141 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:53,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:53,197 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:53,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:53,214 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:53,215 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:53,215 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-14 12:51:53,215 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920349099] [2020-09-14 12:51:53,216 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:51:53,216 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:53,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:51:53,216 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-14 12:51:53,216 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-14 12:51:53,675 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:53,675 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-14 12:51:53,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:51:53,676 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-14 12:51:53,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:53,677 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:51:53,677 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:51:53,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:51:53,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:51:53,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-14 12:51:53,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:51:53,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-14 12:51:53,683 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-14 12:51:53,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:53,683 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-14 12:51:53,683 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:51:53,683 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-14 12:51:53,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-14 12:51:53,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:53,684 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:53,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-14 12:51:53,885 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:53,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-14 12:51:53,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:53,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1988387415] [2020-09-14 12:51:53,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:53,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:53,999 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:53,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1988387415] [2020-09-14 12:51:54,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1218967976] [2020-09-14 12:51:54,000 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:54,056 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:54,056 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:54,057 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-14 12:51:54,058 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:54,081 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:54,097 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:54,097 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:54,097 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-14 12:51:54,098 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691826195] [2020-09-14 12:51:54,098 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:54,098 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:54,098 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:54,098 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:54,099 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-14 12:51:54,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:54,679 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-14 12:51:54,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:51:54,680 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-14 12:51:54,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:54,680 INFO L225 Difference]: With dead ends: 85 [2020-09-14 12:51:54,681 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:54,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:51:54,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:54,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-14 12:51:54,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-14 12:51:54,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-14 12:51:54,684 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-14 12:51:54,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:54,685 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-14 12:51:54,685 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:54,685 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-14 12:51:54,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:54,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:54,686 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:54,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-14 12:51:54,893 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:54,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:54,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-14 12:51:54,894 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:54,895 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [442674678] [2020-09-14 12:51:54,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:54,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:55,081 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:55,081 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [442674678] [2020-09-14 12:51:55,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1209514795] [2020-09-14 12:51:55,082 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:55,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:51:55,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:55,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:55,156 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:55,156 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:55,156 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:51:55,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [553175305] [2020-09-14 12:51:55,157 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:55,157 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:55,157 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:55,157 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:55,158 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-14 12:51:55,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:55,404 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-14 12:51:55,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:51:55,405 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:51:55,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:55,406 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:51:55,406 INFO L226 Difference]: Without dead ends: 88 [2020-09-14 12:51:55,406 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:51:55,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-14 12:51:55,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-14 12:51:55,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:51:55,412 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:51:55,412 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:51:55,412 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:55,412 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:51:55,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:55,412 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:51:55,413 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:55,413 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:55,413 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:55,621 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-14 12:51:55,621 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:55,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:55,622 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-14 12:51:55,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:55,623 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861789574] [2020-09-14 12:51:55,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:55,804 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:55,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861789574] [2020-09-14 12:51:55,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657710922] [2020-09-14 12:51:55,805 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:55,862 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:51:55,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:55,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:55,864 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:55,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:55,897 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:55,897 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:55,898 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:51:55,898 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1213829332] [2020-09-14 12:51:55,898 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:51:55,898 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:55,898 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:51:55,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:55,899 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:51:56,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:56,241 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-14 12:51:56,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:51:56,242 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:51:56,242 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:56,243 INFO L225 Difference]: With dead ends: 91 [2020-09-14 12:51:56,243 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:51:56,243 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:51:56,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:51:56,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-14 12:51:56,245 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:51:56,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:51:56,246 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:51:56,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:56,246 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:51:56,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:51:56,246 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:51:56,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:56,246 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:56,246 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:56,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-14 12:51:56,447 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:56,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:56,448 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-14 12:51:56,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:56,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810122170] [2020-09-14 12:51:56,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:56,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:56,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810122170] [2020-09-14 12:51:56,616 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1728916802] [2020-09-14 12:51:56,616 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:56,674 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:51:56,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:56,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:56,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:56,689 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:56,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:56,690 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:51:56,690 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206663288] [2020-09-14 12:51:56,690 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:56,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:56,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:56,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:56,691 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:51:57,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:57,050 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-14 12:51:57,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:51:57,051 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:51:57,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:57,052 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:51:57,052 INFO L226 Difference]: Without dead ends: 82 [2020-09-14 12:51:57,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-09-14 12:51:57,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-14 12:51:57,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-14 12:51:57,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:51:57,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:51:57,055 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:51:57,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:57,055 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:51:57,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:57,056 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:51:57,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:57,056 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:57,056 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:57,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:57,264 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:57,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:57,265 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-14 12:51:57,265 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:57,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093699405] [2020-09-14 12:51:57,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:57,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:57,415 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:57,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093699405] [2020-09-14 12:51:57,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [244346757] [2020-09-14 12:51:57,416 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:57,480 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:51:57,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:57,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:57,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:57,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:57,516 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:57,516 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:57,516 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:51:57,517 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824115084] [2020-09-14 12:51:57,517 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:51:57,517 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:57,517 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:51:57,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:57,518 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:51:57,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:57,989 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-14 12:51:57,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:51:57,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:51:57,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:57,990 INFO L225 Difference]: With dead ends: 87 [2020-09-14 12:51:57,991 INFO L226 Difference]: Without dead ends: 81 [2020-09-14 12:51:57,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:51:57,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-14 12:51:57,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-14 12:51:57,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:51:57,993 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:51:57,994 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:51:57,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:57,994 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:51:57,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:51:57,994 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:51:57,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:57,994 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:57,994 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:58,195 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:58,195 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:58,196 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:58,196 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-14 12:51:58,196 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:58,196 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [950758503] [2020-09-14 12:51:58,197 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:58,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:58,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:58,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [950758503] [2020-09-14 12:51:58,325 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1274694903] [2020-09-14 12:51:58,325 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:58,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:58,402 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:58,403 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:58,418 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:58,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:58,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:51:58,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123354322] [2020-09-14 12:51:58,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:51:58,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:58,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:51:58,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:51:58,420 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:51:58,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:58,830 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-14 12:51:58,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:51:58,831 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:51:58,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:58,832 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:51:58,832 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:51:58,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:51:58,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:51:58,834 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-14 12:51:58,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:51:58,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:51:58,835 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:51:58,835 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:58,835 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:51:58,835 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:51:58,835 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:51:58,835 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:58,835 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:58,836 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:51:59,039 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-14 12:51:59,039 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:51:59,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:51:59,040 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-14 12:51:59,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:51:59,041 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682696475] [2020-09-14 12:51:59,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:51:59,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:51:59,179 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:59,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682696475] [2020-09-14 12:51:59,179 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703383738] [2020-09-14 12:51:59,179 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:51:59,239 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:51:59,239 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:51:59,241 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:51:59,241 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:51:59,262 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:51:59,280 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:51:59,280 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:51:59,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:51:59,281 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1234753286] [2020-09-14 12:51:59,281 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:51:59,281 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:51:59,281 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:51:59,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:51:59,282 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:51:59,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:51:59,843 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-14 12:51:59,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:51:59,844 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:51:59,844 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:51:59,845 INFO L225 Difference]: With dead ends: 83 [2020-09-14 12:51:59,845 INFO L226 Difference]: Without dead ends: 77 [2020-09-14 12:51:59,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:51:59,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-14 12:51:59,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-14 12:51:59,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:51:59,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:51:59,849 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:51:59,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:51:59,849 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:51:59,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:51:59,850 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:51:59,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:51:59,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:51:59,850 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:00,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:00,051 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:00,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:00,052 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-14 12:52:00,052 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:00,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [356086276] [2020-09-14 12:52:00,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:00,062 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:00,202 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:00,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [356086276] [2020-09-14 12:52:00,202 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [524884195] [2020-09-14 12:52:00,203 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:00,265 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-14 12:52:00,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:00,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:00,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:00,282 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:00,283 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:00,283 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:52:00,283 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121935895] [2020-09-14 12:52:00,283 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:52:00,283 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:00,284 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:52:00,284 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:52:00,284 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:52:00,743 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:00,743 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-14 12:52:00,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:00,744 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:52:00,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:00,745 INFO L225 Difference]: With dead ends: 80 [2020-09-14 12:52:00,745 INFO L226 Difference]: Without dead ends: 74 [2020-09-14 12:52:00,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:52:00,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-14 12:52:00,748 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-14 12:52:00,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:00,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:52:00,749 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-14 12:52:00,749 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:00,749 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:52:00,749 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:52:00,749 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:52:00,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:00,750 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:00,750 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:00,950 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-14 12:52:00,950 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:00,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:00,951 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-14 12:52:00,951 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:00,951 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558407260] [2020-09-14 12:52:00,951 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:00,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:01,099 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:01,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558407260] [2020-09-14 12:52:01,100 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1938027149] [2020-09-14 12:52:01,100 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:01,155 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:01,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:01,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:01,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:01,175 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:01,186 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:01,189 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:01,189 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [287881830] [2020-09-14 12:52:01,189 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:01,190 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:01,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:01,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:01,190 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-14 12:52:01,833 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:01,833 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-14 12:52:01,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:01,834 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:01,834 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:01,835 INFO L225 Difference]: With dead ends: 79 [2020-09-14 12:52:01,835 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:52:01,836 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:52:01,836 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:52:01,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-14 12:52:01,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:01,838 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:52:01,838 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-14 12:52:01,838 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:01,838 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:52:01,838 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:01,839 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:52:01,839 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:01,839 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:01,839 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:02,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:02,042 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:02,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:02,043 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-14 12:52:02,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:02,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [677335543] [2020-09-14 12:52:02,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:02,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:02,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:02,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [677335543] [2020-09-14 12:52:02,188 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1619101776] [2020-09-14 12:52:02,188 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:02,250 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-14 12:52:02,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:02,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:02,252 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:02,277 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:02,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:02,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-14 12:52:02,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882874498] [2020-09-14 12:52:02,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-14 12:52:02,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:02,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-14 12:52:02,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-14 12:52:02,280 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-14 12:52:02,802 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:02,803 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-14 12:52:02,803 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:02,803 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-14 12:52:02,804 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:02,804 INFO L225 Difference]: With dead ends: 95 [2020-09-14 12:52:02,806 INFO L226 Difference]: Without dead ends: 89 [2020-09-14 12:52:02,807 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:02,807 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-14 12:52:02,808 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-14 12:52:02,808 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:52:02,809 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-14 12:52:02,809 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-14 12:52:02,809 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:02,809 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-14 12:52:02,809 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-14 12:52:02,809 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-14 12:52:02,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:02,809 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:02,810 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:03,010 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-14 12:52:03,011 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:03,011 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:03,011 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-14 12:52:03,012 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:03,012 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1863706854] [2020-09-14 12:52:03,012 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:03,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:03,149 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:03,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1863706854] [2020-09-14 12:52:03,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [278621398] [2020-09-14 12:52:03,150 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:03,201 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-14 12:52:03,201 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:03,202 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:03,203 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:03,225 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:03,244 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:03,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:03,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:03,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470387153] [2020-09-14 12:52:03,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:03,245 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:03,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:03,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:03,246 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-14 12:52:03,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:03,939 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-14 12:52:03,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:03,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:03,940 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:03,940 INFO L225 Difference]: With dead ends: 76 [2020-09-14 12:52:03,941 INFO L226 Difference]: Without dead ends: 68 [2020-09-14 12:52:03,941 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:03,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-14 12:52:03,943 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-14 12:52:03,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-14 12:52:03,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-14 12:52:03,943 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-14 12:52:03,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:03,943 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-14 12:52:03,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:03,943 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-14 12:52:03,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-14 12:52:03,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:03,944 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:04,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:04,145 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:04,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-14 12:52:04,146 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:04,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172566136] [2020-09-14 12:52:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:04,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:04,276 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:04,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172566136] [2020-09-14 12:52:04,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689981191] [2020-09-14 12:52:04,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:04,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:04,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-14 12:52:04,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:04,351 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:04,366 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:04,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:04,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-14 12:52:04,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1888995885] [2020-09-14 12:52:04,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:04,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:04,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:04,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:04,369 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-14 12:52:04,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:04,993 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-14 12:52:04,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:04,994 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-14 12:52:04,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:04,995 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:52:04,995 INFO L226 Difference]: Without dead ends: 79 [2020-09-14 12:52:04,996 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:04,996 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-14 12:52:04,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-14 12:52:04,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:52:04,998 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-14 12:52:04,998 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-14 12:52:04,998 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:04,999 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-14 12:52:04,999 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:04,999 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-14 12:52:04,999 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:04,999 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:04,999 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:05,208 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-14 12:52:05,208 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:05,209 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:05,210 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-14 12:52:05,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:05,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [165846639] [2020-09-14 12:52:05,210 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:05,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:05,371 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:05,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [165846639] [2020-09-14 12:52:05,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1519047009] [2020-09-14 12:52:05,372 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:05,429 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:05,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:05,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:05,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:05,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:05,475 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:05,475 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:05,475 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:05,476 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920277337] [2020-09-14 12:52:05,476 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:05,476 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:05,476 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:05,477 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:05,477 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-14 12:52:06,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:06,162 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-14 12:52:06,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:06,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:06,163 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:06,163 INFO L225 Difference]: With dead ends: 72 [2020-09-14 12:52:06,163 INFO L226 Difference]: Without dead ends: 67 [2020-09-14 12:52:06,164 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:06,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-14 12:52:06,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-14 12:52:06,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-14 12:52:06,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-14 12:52:06,167 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-14 12:52:06,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:06,167 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-14 12:52:06,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:06,167 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-14 12:52:06,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:06,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:06,168 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:06,368 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-14 12:52:06,369 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:06,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:06,369 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-14 12:52:06,370 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:06,370 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793761591] [2020-09-14 12:52:06,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:06,380 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:06,568 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:06,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793761591] [2020-09-14 12:52:06,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [621282658] [2020-09-14 12:52:06,569 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:06,625 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:06,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:06,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:06,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:06,636 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:06,637 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:06,637 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:06,637 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100685780] [2020-09-14 12:52:06,637 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:06,637 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:06,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:06,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:06,638 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-14 12:52:06,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:06,949 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-14 12:52:06,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-14 12:52:06,950 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:06,950 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:06,951 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:52:06,951 INFO L226 Difference]: Without dead ends: 72 [2020-09-14 12:52:06,951 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-09-14 12:52:06,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-14 12:52:06,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-14 12:52:06,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:52:06,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-14 12:52:06,954 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-14 12:52:06,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:06,954 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-14 12:52:06,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:06,955 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-14 12:52:06,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:06,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:06,955 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:07,156 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:07,156 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:07,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:07,157 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-14 12:52:07,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:07,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759920795] [2020-09-14 12:52:07,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:07,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:07,366 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:07,366 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759920795] [2020-09-14 12:52:07,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522136600] [2020-09-14 12:52:07,367 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:07,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:07,425 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:07,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:07,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:07,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:07,463 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:07,464 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:07,464 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:07,464 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [844924490] [2020-09-14 12:52:07,464 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:07,465 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:07,465 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:07,465 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:07,465 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-14 12:52:07,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:07,817 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-14 12:52:07,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-14 12:52:07,817 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:07,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:07,818 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:52:07,818 INFO L226 Difference]: Without dead ends: 84 [2020-09-14 12:52:07,819 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-14 12:52:07,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-14 12:52:07,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-14 12:52:07,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-14 12:52:07,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-14 12:52:07,824 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-14 12:52:07,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:07,824 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-14 12:52:07,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:07,824 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-14 12:52:07,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:07,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:07,825 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:08,032 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:08,033 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:08,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:08,033 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-14 12:52:08,033 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:08,034 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910328195] [2020-09-14 12:52:08,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:08,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:08,209 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:08,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910328195] [2020-09-14 12:52:08,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497275396] [2020-09-14 12:52:08,209 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:08,265 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-14 12:52:08,265 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:08,266 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:08,267 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:08,279 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:08,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:08,280 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:08,280 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [419036052] [2020-09-14 12:52:08,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:08,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:08,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:08,281 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:08,281 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-14 12:52:08,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:08,610 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-14 12:52:08,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:52:08,611 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:08,611 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:08,612 INFO L225 Difference]: With dead ends: 91 [2020-09-14 12:52:08,612 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:52:08,612 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:52:08,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:52:08,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-14 12:52:08,614 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-14 12:52:08,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-14 12:52:08,615 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-14 12:52:08,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:08,615 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-14 12:52:08,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:08,616 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-14 12:52:08,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:08,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:08,616 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:08,824 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:08,824 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:08,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:08,825 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-14 12:52:08,825 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:08,825 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1806518269] [2020-09-14 12:52:08,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:08,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:08,994 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:08,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1806518269] [2020-09-14 12:52:08,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1067310705] [2020-09-14 12:52:08,994 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:09,049 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-14 12:52:09,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:09,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:09,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:09,088 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:09,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:09,102 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:09,102 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:09,103 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1491508311] [2020-09-14 12:52:09,103 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:09,103 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:09,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:09,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:09,103 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-14 12:52:09,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:09,537 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-14 12:52:09,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:52:09,537 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:09,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:09,538 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:52:09,539 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:52:09,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:52:09,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:52:09,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-14 12:52:09,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:52:09,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-14 12:52:09,542 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-14 12:52:09,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:09,543 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-14 12:52:09,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:09,543 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-14 12:52:09,543 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:09,543 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:09,543 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:09,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:09,747 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:09,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:09,748 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-14 12:52:09,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:09,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1193922336] [2020-09-14 12:52:09,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:09,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:09,931 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:09,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1193922336] [2020-09-14 12:52:09,932 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924079389] [2020-09-14 12:52:09,932 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:09,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:09,991 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:09,992 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:10,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:10,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:10,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1312269750] [2020-09-14 12:52:10,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:10,008 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:10,008 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:10,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:10,008 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-14 12:52:10,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:10,458 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-14 12:52:10,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:10,459 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:10,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:10,460 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:52:10,460 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:52:10,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:52:10,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:52:10,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-14 12:52:10,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-14 12:52:10,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-14 12:52:10,463 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-14 12:52:10,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:10,463 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-14 12:52:10,463 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:10,463 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-14 12:52:10,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:10,464 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:10,464 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:10,664 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-14 12:52:10,665 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:10,665 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:10,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-14 12:52:10,666 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:10,666 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962580884] [2020-09-14 12:52:10,666 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:10,677 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:10,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:10,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962580884] [2020-09-14 12:52:10,826 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2088095023] [2020-09-14 12:52:10,826 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:10,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:10,881 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:10,883 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:10,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:10,906 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:10,918 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:10,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:10,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:10,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603040640] [2020-09-14 12:52:10,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:10,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:10,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:10,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:10,920 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-14 12:52:11,444 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:11,445 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-14 12:52:11,445 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:11,445 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:11,446 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:11,446 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:52:11,447 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:52:11,447 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:11,448 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:52:11,449 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-14 12:52:11,449 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-14 12:52:11,449 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-14 12:52:11,450 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-14 12:52:11,450 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:11,450 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-14 12:52:11,450 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:11,450 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-14 12:52:11,450 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:11,450 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:11,450 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:11,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:11,651 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:11,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:11,652 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-14 12:52:11,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:11,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884345332] [2020-09-14 12:52:11,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:11,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:11,824 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:11,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884345332] [2020-09-14 12:52:11,824 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003089600] [2020-09-14 12:52:11,825 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:11,883 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:11,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:11,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:11,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:11,900 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:11,901 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:11,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:11,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688139850] [2020-09-14 12:52:11,905 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:11,905 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:11,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:11,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:11,906 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-14 12:52:12,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:12,414 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-14 12:52:12,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:12,415 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:12,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:12,416 INFO L225 Difference]: With dead ends: 97 [2020-09-14 12:52:12,416 INFO L226 Difference]: Without dead ends: 91 [2020-09-14 12:52:12,417 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:52:12,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-14 12:52:12,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-14 12:52:12,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:12,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-14 12:52:12,420 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-14 12:52:12,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:12,420 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-14 12:52:12,420 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:12,420 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-14 12:52:12,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:12,421 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:12,421 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:12,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-14 12:52:12,626 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:12,627 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:12,627 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-14 12:52:12,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:12,628 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308109654] [2020-09-14 12:52:12,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:12,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:12,775 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:12,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308109654] [2020-09-14 12:52:12,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [273380317] [2020-09-14 12:52:12,775 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:12,854 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:12,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:12,856 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:12,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:12,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:12,904 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:12,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:12,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:12,905 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821797037] [2020-09-14 12:52:12,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:12,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:12,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:12,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:12,907 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-14 12:52:13,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:13,622 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-14 12:52:13,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:13,623 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:13,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:13,624 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:52:13,625 INFO L226 Difference]: Without dead ends: 88 [2020-09-14 12:52:13,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:52:13,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-14 12:52:13,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-14 12:52:13,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:13,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-14 12:52:13,628 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-14 12:52:13,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:13,628 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-14 12:52:13,628 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:13,628 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-14 12:52:13,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:13,629 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:13,629 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:13,840 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:13,840 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:13,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:13,841 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-14 12:52:13,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:13,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [319257742] [2020-09-14 12:52:13,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:13,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:14,033 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:14,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [319257742] [2020-09-14 12:52:14,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870938825] [2020-09-14 12:52:14,034 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:14,115 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-14 12:52:14,116 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:14,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:14,119 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:14,144 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:14,145 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:14,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:14,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974490903] [2020-09-14 12:52:14,146 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:14,146 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:14,146 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:14,147 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:14,147 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-14 12:52:14,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:14,671 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-14 12:52:14,671 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:52:14,672 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:14,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:14,673 INFO L225 Difference]: With dead ends: 95 [2020-09-14 12:52:14,673 INFO L226 Difference]: Without dead ends: 89 [2020-09-14 12:52:14,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:14,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-14 12:52:14,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-14 12:52:14,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-14 12:52:14,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-14 12:52:14,676 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-14 12:52:14,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:14,677 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-14 12:52:14,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:14,677 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-14 12:52:14,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:14,677 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:14,677 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:14,888 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-14 12:52:14,888 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:14,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:14,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-14 12:52:14,889 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:14,890 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031526182] [2020-09-14 12:52:14,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:14,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:15,060 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:15,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031526182] [2020-09-14 12:52:15,060 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1890179046] [2020-09-14 12:52:15,061 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:15,120 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-14 12:52:15,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:15,122 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:15,122 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:15,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:15,158 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:15,159 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:15,159 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:15,159 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1485060058] [2020-09-14 12:52:15,159 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:15,159 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:15,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:15,159 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:15,160 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-14 12:52:15,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:15,848 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-14 12:52:15,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:15,849 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:15,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:15,850 INFO L225 Difference]: With dead ends: 92 [2020-09-14 12:52:15,850 INFO L226 Difference]: Without dead ends: 86 [2020-09-14 12:52:15,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:15,851 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-14 12:52:15,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-14 12:52:15,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:52:15,853 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-14 12:52:15,853 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-14 12:52:15,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:15,853 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-14 12:52:15,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:15,854 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-14 12:52:15,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:15,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:15,854 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:16,064 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:16,064 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:16,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:16,064 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-14 12:52:16,065 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:16,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214701252] [2020-09-14 12:52:16,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:16,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:16,222 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:16,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214701252] [2020-09-14 12:52:16,223 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644765462] [2020-09-14 12:52:16,223 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:16,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:16,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:16,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:16,312 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:16,312 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:16,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-14 12:52:16,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782669138] [2020-09-14 12:52:16,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-14 12:52:16,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:16,314 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-14 12:52:16,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:52:16,315 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-14 12:52:16,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:16,909 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-14 12:52:16,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:16,909 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-14 12:52:16,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:16,910 INFO L225 Difference]: With dead ends: 112 [2020-09-14 12:52:16,910 INFO L226 Difference]: Without dead ends: 106 [2020-09-14 12:52:16,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:52:16,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-14 12:52:16,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-14 12:52:16,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:52:16,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-14 12:52:16,913 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-14 12:52:16,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:16,913 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-14 12:52:16,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-14 12:52:16,913 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-14 12:52:16,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-14 12:52:16,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:16,914 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:17,121 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:17,121 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:17,122 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:17,122 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-14 12:52:17,122 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:17,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185919427] [2020-09-14 12:52:17,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:17,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:17,259 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:17,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185919427] [2020-09-14 12:52:17,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021556804] [2020-09-14 12:52:17,260 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:17,318 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:17,319 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:17,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-14 12:52:17,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:17,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:17,351 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:17,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:17,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-14 12:52:17,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889856644] [2020-09-14 12:52:17,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:17,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:17,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:17,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:17,353 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-14 12:52:18,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:18,064 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-14 12:52:18,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:52:18,065 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-14 12:52:18,065 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:18,066 INFO L225 Difference]: With dead ends: 93 [2020-09-14 12:52:18,066 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:52:18,066 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:52:18,067 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:52:18,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-14 12:52:18,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-14 12:52:18,069 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-14 12:52:18,069 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-14 12:52:18,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:18,069 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-14 12:52:18,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:18,070 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-14 12:52:18,070 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:18,070 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:18,070 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:18,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:18,271 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:18,271 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:18,272 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-14 12:52:18,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:18,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [542895684] [2020-09-14 12:52:18,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:18,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:18,494 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:18,494 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [542895684] [2020-09-14 12:52:18,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [664938853] [2020-09-14 12:52:18,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:18,553 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:18,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:18,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:18,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:18,571 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:18,572 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:18,572 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:18,572 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [508099527] [2020-09-14 12:52:18,572 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:18,573 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:18,573 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:18,573 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:18,573 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-14 12:52:18,936 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:18,937 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-14 12:52:18,937 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:52:18,937 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:18,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:18,939 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:52:18,939 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:52:18,939 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-14 12:52:18,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:52:18,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-14 12:52:18,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:18,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:18,942 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:18,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:18,942 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:18,942 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:18,942 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:18,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:18,943 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:18,943 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:19,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:19,151 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:19,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:19,152 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-14 12:52:19,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:19,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337847645] [2020-09-14 12:52:19,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:19,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:19,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337847645] [2020-09-14 12:52:19,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [750386314] [2020-09-14 12:52:19,354 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:19,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:19,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:19,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:19,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:19,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:19,445 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:19,445 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:19,445 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:19,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937497327] [2020-09-14 12:52:19,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:19,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:19,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:19,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:19,446 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:19,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:19,917 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-14 12:52:19,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:52:19,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:19,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:19,926 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:52:19,926 INFO L226 Difference]: Without dead ends: 95 [2020-09-14 12:52:19,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:52:19,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-14 12:52:19,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-14 12:52:19,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:19,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:19,928 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:19,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:19,929 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:19,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:19,929 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:19,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:19,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:19,929 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:20,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:20,130 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:20,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:20,131 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-14 12:52:20,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:20,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272459231] [2020-09-14 12:52:20,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:20,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:20,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:20,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272459231] [2020-09-14 12:52:20,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227288947] [2020-09-14 12:52:20,344 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:20,403 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-14 12:52:20,403 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:20,404 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:20,405 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:20,419 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:20,419 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:20,419 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:20,420 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641258413] [2020-09-14 12:52:20,420 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:20,420 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:20,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:20,420 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:20,420 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:20,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:20,847 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-14 12:52:20,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:52:20,848 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:20,848 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:20,849 INFO L225 Difference]: With dead ends: 98 [2020-09-14 12:52:20,849 INFO L226 Difference]: Without dead ends: 92 [2020-09-14 12:52:20,850 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-09-14 12:52:20,850 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-14 12:52:20,852 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-14 12:52:20,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:20,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:20,853 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:20,853 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:20,853 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:20,853 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:20,853 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:20,854 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:20,854 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:20,854 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:21,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:21,057 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:21,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:21,058 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-14 12:52:21,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:21,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1293740391] [2020-09-14 12:52:21,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:21,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:21,267 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:21,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1293740391] [2020-09-14 12:52:21,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081037128] [2020-09-14 12:52:21,268 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:21,328 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-14 12:52:21,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:21,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:21,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:21,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:21,366 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:21,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:21,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:21,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1939887363] [2020-09-14 12:52:21,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:21,367 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:21,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:21,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:21,368 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:21,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:21,883 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-14 12:52:21,884 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:21,884 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:21,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:21,885 INFO L225 Difference]: With dead ends: 97 [2020-09-14 12:52:21,885 INFO L226 Difference]: Without dead ends: 91 [2020-09-14 12:52:21,886 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:52:21,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-14 12:52:21,889 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-14 12:52:21,889 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:21,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:21,890 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:21,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:21,891 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:21,891 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:21,891 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:21,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:21,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:21,891 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:22,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:22,093 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:22,094 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:22,094 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-14 12:52:22,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:22,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961517577] [2020-09-14 12:52:22,095 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:22,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:22,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:22,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961517577] [2020-09-14 12:52:22,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297113216] [2020-09-14 12:52:22,267 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:22,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:22,327 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:22,328 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:22,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:22,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:22,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:22,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2080876589] [2020-09-14 12:52:22,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:22,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:22,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:22,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:22,345 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:22,843 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:22,844 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-14 12:52:22,844 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:22,844 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:22,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:22,845 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:52:22,845 INFO L226 Difference]: Without dead ends: 88 [2020-09-14 12:52:22,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:22,846 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-14 12:52:22,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-14 12:52:22,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:22,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:22,848 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:22,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:22,849 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:22,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:22,849 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:22,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:22,849 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:22,849 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:23,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-14 12:52:23,050 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:23,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:23,051 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-14 12:52:23,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:23,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1052889777] [2020-09-14 12:52:23,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:23,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:23,251 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:23,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1052889777] [2020-09-14 12:52:23,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [576962687] [2020-09-14 12:52:23,252 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:23,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:23,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:23,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:23,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:23,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:23,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:23,347 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:23,347 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:23,347 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [54667434] [2020-09-14 12:52:23,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:23,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:23,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:23,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:23,348 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:23,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:23,980 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-14 12:52:23,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:23,981 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:23,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:23,982 INFO L225 Difference]: With dead ends: 93 [2020-09-14 12:52:23,982 INFO L226 Difference]: Without dead ends: 87 [2020-09-14 12:52:23,983 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:23,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-14 12:52:23,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-14 12:52:23,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:23,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:23,984 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:23,984 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:23,985 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:23,985 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:23,985 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:23,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:23,985 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:23,985 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:24,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:24,186 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:24,186 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:24,187 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-14 12:52:24,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:24,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [891755033] [2020-09-14 12:52:24,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:24,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:24,360 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:24,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [891755033] [2020-09-14 12:52:24,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1989124834] [2020-09-14 12:52:24,361 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:24,421 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:24,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:24,422 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:24,423 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:24,440 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:24,441 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:24,441 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1155076727] [2020-09-14 12:52:24,441 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:24,441 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:24,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:24,442 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:24,442 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:24,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:24,990 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-14 12:52:24,990 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:24,991 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:24,991 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:24,992 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:52:24,992 INFO L226 Difference]: Without dead ends: 84 [2020-09-14 12:52:24,992 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:52:24,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-14 12:52:24,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-14 12:52:24,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:24,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:24,995 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:24,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:24,995 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:24,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:24,995 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:24,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:24,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:24,996 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:25,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-14 12:52:25,197 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:25,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:25,197 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-14 12:52:25,197 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:25,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [274592152] [2020-09-14 12:52:25,198 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:25,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:25,391 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:25,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [274592152] [2020-09-14 12:52:25,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454117809] [2020-09-14 12:52:25,392 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:25,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:25,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:25,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:25,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:25,474 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:25,493 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:25,493 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:25,494 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:25,494 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [210942311] [2020-09-14 12:52:25,494 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:25,494 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:25,494 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:25,495 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:25,495 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:26,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:26,211 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-14 12:52:26,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:26,212 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:26,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:26,213 INFO L225 Difference]: With dead ends: 89 [2020-09-14 12:52:26,213 INFO L226 Difference]: Without dead ends: 83 [2020-09-14 12:52:26,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:52:26,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-14 12:52:26,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-14 12:52:26,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:26,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:26,216 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:26,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:26,216 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:26,216 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:26,216 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:26,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:26,217 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:26,217 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:26,424 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:26,424 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:26,425 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:26,425 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-14 12:52:26,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:26,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1815482841] [2020-09-14 12:52:26,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:26,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:26,604 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:26,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1815482841] [2020-09-14 12:52:26,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1956557746] [2020-09-14 12:52:26,604 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:26,659 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-14 12:52:26,660 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:26,661 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:26,662 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:26,690 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:26,690 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:26,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:26,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1284918018] [2020-09-14 12:52:26,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:26,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:26,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:26,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:26,692 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:27,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:27,306 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-14 12:52:27,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:52:27,307 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:27,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:27,308 INFO L225 Difference]: With dead ends: 86 [2020-09-14 12:52:27,308 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:52:27,308 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:27,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:52:27,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-14 12:52:27,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:27,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:27,310 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-14 12:52:27,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:27,310 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:27,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:27,310 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:27,312 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:27,312 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:27,312 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:27,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:27,520 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:27,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:27,521 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-14 12:52:27,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:27,522 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849703296] [2020-09-14 12:52:27,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:27,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:27,703 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:27,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849703296] [2020-09-14 12:52:27,703 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1939388128] [2020-09-14 12:52:27,703 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:27,763 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-14 12:52:27,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:27,764 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:27,765 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:27,797 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:27,813 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:27,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:27,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:27,814 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268627822] [2020-09-14 12:52:27,814 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:27,814 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:27,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:27,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:27,815 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-14 12:52:28,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:28,679 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-14 12:52:28,680 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:52:28,680 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:28,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:28,681 INFO L225 Difference]: With dead ends: 85 [2020-09-14 12:52:28,681 INFO L226 Difference]: Without dead ends: 79 [2020-09-14 12:52:28,681 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:52:28,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-14 12:52:28,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-14 12:52:28,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:28,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:28,684 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-14 12:52:28,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:28,684 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:28,684 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:28,684 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:28,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:28,684 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:28,684 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:28,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:28,885 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:28,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:28,886 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-14 12:52:28,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:28,887 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888882224] [2020-09-14 12:52:28,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:28,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:29,072 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:29,072 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888882224] [2020-09-14 12:52:29,073 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316006178] [2020-09-14 12:52:29,073 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:29,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:29,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:29,133 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:29,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:29,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-14 12:52:29,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [659701965] [2020-09-14 12:52:29,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-14 12:52:29,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:29,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-14 12:52:29,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-14 12:52:29,161 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-14 12:52:29,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:29,853 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-14 12:52:29,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:29,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-14 12:52:29,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:29,855 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:52:29,855 INFO L226 Difference]: Without dead ends: 95 [2020-09-14 12:52:29,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:52:29,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-14 12:52:29,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-14 12:52:29,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-14 12:52:29,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-14 12:52:29,858 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-14 12:52:29,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:29,859 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-14 12:52:29,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-14 12:52:29,859 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-14 12:52:29,859 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:29,859 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:29,860 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:30,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:30,070 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:30,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:30,071 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-14 12:52:30,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:30,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1884433827] [2020-09-14 12:52:30,072 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:30,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:30,247 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:30,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1884433827] [2020-09-14 12:52:30,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1966116651] [2020-09-14 12:52:30,248 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:30,309 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:30,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:30,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:30,311 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:30,334 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:30,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:30,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:30,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:30,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302222746] [2020-09-14 12:52:30,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:30,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:30,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:30,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:30,354 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-14 12:52:31,218 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:31,218 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-14 12:52:31,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:52:31,219 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:31,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:31,220 INFO L225 Difference]: With dead ends: 82 [2020-09-14 12:52:31,220 INFO L226 Difference]: Without dead ends: 74 [2020-09-14 12:52:31,221 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:52:31,221 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-14 12:52:31,222 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-14 12:52:31,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-14 12:52:31,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-14 12:52:31,222 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-14 12:52:31,223 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:31,223 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-14 12:52:31,223 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:31,223 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-14 12:52:31,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-14 12:52:31,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:31,223 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:31,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:31,431 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:31,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:31,432 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-14 12:52:31,432 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:31,432 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [706969562] [2020-09-14 12:52:31,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:31,608 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:31,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [706969562] [2020-09-14 12:52:31,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [572956699] [2020-09-14 12:52:31,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:31,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-14 12:52:31,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:31,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-14 12:52:31,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:31,700 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:31,722 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:31,722 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:31,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-14 12:52:31,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887269327] [2020-09-14 12:52:31,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:31,723 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:31,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:31,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:31,724 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-14 12:52:32,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:32,535 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-14 12:52:32,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:32,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-14 12:52:32,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:32,537 INFO L225 Difference]: With dead ends: 92 [2020-09-14 12:52:32,537 INFO L226 Difference]: Without dead ends: 87 [2020-09-14 12:52:32,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:52:32,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-14 12:52:32,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-14 12:52:32,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:52:32,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-14 12:52:32,541 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-14 12:52:32,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:32,541 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-14 12:52:32,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:32,541 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-14 12:52:32,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:32,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:32,541 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:32,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:32,742 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:32,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:32,743 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-14 12:52:32,743 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:32,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109225119] [2020-09-14 12:52:32,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:32,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:32,916 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:32,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109225119] [2020-09-14 12:52:32,916 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1250095439] [2020-09-14 12:52:32,916 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:32,972 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:32,972 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:32,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:32,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:33,001 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:52:33,017 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:33,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:33,018 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:33,018 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [299619807] [2020-09-14 12:52:33,018 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:33,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:33,019 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:33,019 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:33,019 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-14 12:52:33,934 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:33,935 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-14 12:52:33,935 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:33,936 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:33,936 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:33,937 INFO L225 Difference]: With dead ends: 78 [2020-09-14 12:52:33,937 INFO L226 Difference]: Without dead ends: 73 [2020-09-14 12:52:33,937 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:52:33,938 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-14 12:52:33,939 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-14 12:52:33,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-14 12:52:33,940 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-14 12:52:33,940 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-14 12:52:33,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:33,940 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-14 12:52:33,940 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-14 12:52:33,941 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:33,941 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:33,941 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:34,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-14 12:52:34,144 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:34,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:34,145 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-14 12:52:34,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:34,146 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [788317778] [2020-09-14 12:52:34,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:34,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:34,389 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:34,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [788317778] [2020-09-14 12:52:34,390 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463931284] [2020-09-14 12:52:34,390 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:34,450 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:52:34,450 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:34,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:34,452 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:34,462 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:34,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:34,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:34,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [674913928] [2020-09-14 12:52:34,463 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:34,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:34,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:34,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:34,463 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-14 12:52:34,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:34,857 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-14 12:52:34,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-14 12:52:34,858 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:34,858 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:34,858 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:52:34,859 INFO L226 Difference]: Without dead ends: 78 [2020-09-14 12:52:34,859 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-09-14 12:52:34,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-14 12:52:34,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-14 12:52:34,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:34,861 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-14 12:52:34,861 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-14 12:52:34,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:34,862 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-14 12:52:34,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:34,862 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-14 12:52:34,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:34,862 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:34,862 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:35,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:35,063 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:35,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:35,064 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-14 12:52:35,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:35,064 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875315309] [2020-09-14 12:52:35,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:35,075 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:35,326 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:35,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875315309] [2020-09-14 12:52:35,327 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303303401] [2020-09-14 12:52:35,327 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:35,389 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:52:35,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:35,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:35,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:35,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:35,424 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:35,424 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:35,424 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:35,424 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [641334680] [2020-09-14 12:52:35,425 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:35,425 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:35,425 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:35,425 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:35,425 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-14 12:52:35,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:35,822 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-14 12:52:35,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-14 12:52:35,823 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:35,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:35,824 INFO L225 Difference]: With dead ends: 98 [2020-09-14 12:52:35,824 INFO L226 Difference]: Without dead ends: 92 [2020-09-14 12:52:35,824 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-09-14 12:52:35,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-14 12:52:35,826 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-14 12:52:35,826 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-14 12:52:35,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-14 12:52:35,827 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-14 12:52:35,827 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:35,827 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-14 12:52:35,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:35,827 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-14 12:52:35,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:35,827 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:35,828 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:36,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-14 12:52:36,028 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:36,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:36,029 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-14 12:52:36,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:36,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755006099] [2020-09-14 12:52:36,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:36,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:36,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:36,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755006099] [2020-09-14 12:52:36,285 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1252475471] [2020-09-14 12:52:36,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:36,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:36,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:36,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:36,357 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:36,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:36,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:36,358 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109924360] [2020-09-14 12:52:36,358 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:36,358 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:36,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:36,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:36,359 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-14 12:52:36,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:36,831 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-14 12:52:36,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:36,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:36,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:36,833 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:52:36,833 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:52:36,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:36,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:52:36,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-14 12:52:36,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-14 12:52:36,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-14 12:52:36,835 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-14 12:52:36,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:36,836 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-14 12:52:36,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:36,836 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-14 12:52:36,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:36,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:36,837 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:37,044 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:37,044 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:37,045 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:37,045 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-14 12:52:37,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:37,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062304378] [2020-09-14 12:52:37,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:37,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:37,351 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:37,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062304378] [2020-09-14 12:52:37,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201163372] [2020-09-14 12:52:37,352 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:37,428 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:37,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:37,431 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:37,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:37,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:37,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:37,483 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:37,484 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:37,484 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56239554] [2020-09-14 12:52:37,484 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:37,485 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:37,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:37,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:37,485 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-14 12:52:38,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:38,013 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-14 12:52:38,014 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:38,014 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:38,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:38,015 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:52:38,015 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:52:38,016 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:52:38,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:52:38,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-14 12:52:38,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:52:38,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-14 12:52:38,018 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-14 12:52:38,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:38,018 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-14 12:52:38,018 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:38,019 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-14 12:52:38,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:38,019 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:38,019 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:38,228 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:38,228 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:38,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:38,229 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-14 12:52:38,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:38,230 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772058399] [2020-09-14 12:52:38,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:38,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:38,466 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:38,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772058399] [2020-09-14 12:52:38,467 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843561328] [2020-09-14 12:52:38,467 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:38,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:52:38,529 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:38,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:38,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:38,548 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:38,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:38,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:38,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108122430] [2020-09-14 12:52:38,549 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:38,549 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:38,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:38,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:38,549 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-14 12:52:39,101 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:39,101 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-14 12:52:39,102 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:39,102 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:39,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:39,103 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:52:39,103 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:52:39,104 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:39,104 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:52:39,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-14 12:52:39,106 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-14 12:52:39,106 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-14 12:52:39,106 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-14 12:52:39,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:39,107 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-14 12:52:39,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:39,107 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-14 12:52:39,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:39,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:39,111 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:39,320 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-14 12:52:39,320 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:39,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:39,321 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-14 12:52:39,321 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:39,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357262576] [2020-09-14 12:52:39,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:39,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:39,554 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:39,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357262576] [2020-09-14 12:52:39,555 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [227028664] [2020-09-14 12:52:39,555 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:39,608 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:39,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:39,610 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:39,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:39,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:39,642 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:39,643 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:39,643 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:39,643 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1166447596] [2020-09-14 12:52:39,643 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:39,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:39,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:39,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:39,644 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-14 12:52:40,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:40,294 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-14 12:52:40,295 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:40,295 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:40,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:40,296 INFO L225 Difference]: With dead ends: 106 [2020-09-14 12:52:40,296 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:52:40,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:40,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:52:40,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-14 12:52:40,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:52:40,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-14 12:52:40,299 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-14 12:52:40,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:40,300 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-14 12:52:40,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:40,300 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-14 12:52:40,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:40,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:40,300 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:40,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-14 12:52:40,502 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:40,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:40,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-14 12:52:40,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:40,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803163142] [2020-09-14 12:52:40,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:40,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:40,729 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:40,729 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803163142] [2020-09-14 12:52:40,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [800670313] [2020-09-14 12:52:40,730 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:40,789 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:52:40,789 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:40,790 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:40,791 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:40,812 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:40,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:40,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:40,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1096034471] [2020-09-14 12:52:40,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:40,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:40,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:40,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:40,813 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-14 12:52:41,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:41,406 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-14 12:52:41,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:52:41,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:41,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:41,408 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:52:41,408 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:52:41,409 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:52:41,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:52:41,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-14 12:52:41,410 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-14 12:52:41,410 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-14 12:52:41,410 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-14 12:52:41,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:41,411 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-14 12:52:41,411 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:41,411 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-14 12:52:41,411 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:41,411 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:41,411 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:41,612 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:41,613 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:41,613 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:41,613 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-14 12:52:41,614 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:41,614 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913751693] [2020-09-14 12:52:41,614 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:41,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:41,851 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:41,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913751693] [2020-09-14 12:52:41,852 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1284262187] [2020-09-14 12:52:41,852 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:41,916 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:52:41,916 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:41,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:41,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:41,941 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:41,955 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:41,956 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:41,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:41,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1113994973] [2020-09-14 12:52:41,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:41,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:41,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:41,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:41,957 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-14 12:52:42,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:42,671 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-14 12:52:42,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:42,672 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:42,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:42,673 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:52:42,673 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:52:42,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:52:42,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:52:42,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-14 12:52:42,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:52:42,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-14 12:52:42,676 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-14 12:52:42,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:42,677 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-14 12:52:42,677 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:42,677 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-14 12:52:42,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:42,679 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:42,679 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:42,880 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-14 12:52:42,880 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:42,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:42,881 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-14 12:52:42,881 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:42,882 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1327651365] [2020-09-14 12:52:42,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:42,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:43,084 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:43,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1327651365] [2020-09-14 12:52:43,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2021557067] [2020-09-14 12:52:43,085 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:43,142 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:43,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:43,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:43,160 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:43,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:43,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:43,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1357738532] [2020-09-14 12:52:43,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:43,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:43,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:43,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:43,161 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-14 12:52:43,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:43,830 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-14 12:52:43,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:52:43,831 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:43,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:43,832 INFO L225 Difference]: With dead ends: 105 [2020-09-14 12:52:43,832 INFO L226 Difference]: Without dead ends: 99 [2020-09-14 12:52:43,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:52:43,834 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-14 12:52:43,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-14 12:52:43,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:52:43,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-14 12:52:43,836 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-14 12:52:43,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:43,836 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-14 12:52:43,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:43,836 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-14 12:52:43,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:43,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:43,837 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:44,045 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:44,045 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:44,046 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:44,046 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-14 12:52:44,046 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:44,047 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345460011] [2020-09-14 12:52:44,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:44,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:44,255 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:44,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345460011] [2020-09-14 12:52:44,256 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573346065] [2020-09-14 12:52:44,256 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:44,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:44,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:44,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:44,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:44,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:44,365 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:44,366 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:44,366 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:44,366 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [409237555] [2020-09-14 12:52:44,366 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:44,366 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:44,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:44,367 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:44,367 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-14 12:52:45,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:45,180 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-14 12:52:45,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:52:45,181 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:45,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:45,181 INFO L225 Difference]: With dead ends: 102 [2020-09-14 12:52:45,182 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:52:45,182 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:52:45,182 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:52:45,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-14 12:52:45,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:52:45,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-14 12:52:45,184 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-14 12:52:45,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:45,184 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-14 12:52:45,184 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:45,184 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-14 12:52:45,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:45,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:45,185 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:45,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-14 12:52:45,391 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:45,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:45,392 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-14 12:52:45,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:45,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [63740159] [2020-09-14 12:52:45,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:45,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:45,594 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:45,594 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [63740159] [2020-09-14 12:52:45,595 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168810625] [2020-09-14 12:52:45,595 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:45,654 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:52:45,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:45,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:45,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:45,675 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:45,676 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:45,676 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:45,676 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900632532] [2020-09-14 12:52:45,676 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:45,677 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:45,677 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:45,677 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:45,677 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-14 12:52:46,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:46,391 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-14 12:52:46,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:52:46,392 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:46,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:46,393 INFO L225 Difference]: With dead ends: 103 [2020-09-14 12:52:46,393 INFO L226 Difference]: Without dead ends: 97 [2020-09-14 12:52:46,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:52:46,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-14 12:52:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-14 12:52:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-14 12:52:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-14 12:52:46,396 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-14 12:52:46,396 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:46,396 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-14 12:52:46,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-14 12:52:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:46,397 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:46,397 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:46,598 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:46,598 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:46,599 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-14 12:52:46,599 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:46,599 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1626845545] [2020-09-14 12:52:46,600 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:46,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:46,805 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:46,805 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1626845545] [2020-09-14 12:52:46,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328626373] [2020-09-14 12:52:46,806 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:46,865 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:46,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:46,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:46,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:46,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:46,908 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:46,909 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:46,909 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015909953] [2020-09-14 12:52:46,909 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:46,909 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:46,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:46,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:46,910 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-14 12:52:47,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:47,844 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-14 12:52:47,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:52:47,845 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:47,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:47,846 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:52:47,846 INFO L226 Difference]: Without dead ends: 94 [2020-09-14 12:52:47,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:52:47,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-14 12:52:47,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-14 12:52:47,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:52:47,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-14 12:52:47,849 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-14 12:52:47,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:47,849 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-14 12:52:47,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:47,849 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-14 12:52:47,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:47,850 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:47,850 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:48,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-14 12:52:48,058 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:48,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:48,059 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-14 12:52:48,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:48,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1289656534] [2020-09-14 12:52:48,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:48,070 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:48,279 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:48,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1289656534] [2020-09-14 12:52:48,279 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1814539333] [2020-09-14 12:52:48,280 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:48,354 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:52:48,355 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:48,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:48,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:48,388 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:48,388 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:48,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-14 12:52:48,389 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173275347] [2020-09-14 12:52:48,389 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-14 12:52:48,389 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:48,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-14 12:52:48,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-14 12:52:48,390 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-14 12:52:49,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:49,163 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-14 12:52:49,163 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:52:49,164 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-14 12:52:49,164 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:49,164 INFO L225 Difference]: With dead ends: 120 [2020-09-14 12:52:49,164 INFO L226 Difference]: Without dead ends: 114 [2020-09-14 12:52:49,165 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:52:49,165 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-14 12:52:49,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-14 12:52:49,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:52:49,167 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-14 12:52:49,167 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-14 12:52:49,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:49,167 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-14 12:52:49,167 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-14 12:52:49,168 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-14 12:52:49,168 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-14 12:52:49,168 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:49,168 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:49,376 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-14 12:52:49,376 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:49,376 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:49,377 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-14 12:52:49,377 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:49,377 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92125500] [2020-09-14 12:52:49,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:49,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:49,610 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:49,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92125500] [2020-09-14 12:52:49,610 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [230542224] [2020-09-14 12:52:49,611 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:49,686 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:52:49,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:49,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-14 12:52:49,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:49,722 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:49,742 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:49,742 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:49,742 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-14 12:52:49,743 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252400050] [2020-09-14 12:52:49,743 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:49,743 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:49,744 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:49,744 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:49,744 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-14 12:52:50,752 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:50,752 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-14 12:52:50,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:52:50,753 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-14 12:52:50,753 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:50,754 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:52:50,754 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:52:50,754 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:52:50,755 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:52:50,756 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-14 12:52:50,756 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-14 12:52:50,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-14 12:52:50,756 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-14 12:52:50,756 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:50,756 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-14 12:52:50,756 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:50,757 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-14 12:52:50,757 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:50,757 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:50,757 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:50,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:50,958 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:50,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:50,959 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-14 12:52:50,959 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:50,959 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368841047] [2020-09-14 12:52:50,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:50,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:51,245 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:51,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368841047] [2020-09-14 12:52:51,245 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836476614] [2020-09-14 12:52:51,246 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:51,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:51,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:51,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:51,320 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:51,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:51,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:52:51,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2068088259] [2020-09-14 12:52:51,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:51,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:51,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:51,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:51,322 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-14 12:52:51,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:51,766 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-14 12:52:51,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:52:51,766 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:52:51,767 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:51,767 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:52:51,767 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:52:51,768 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-09-14 12:52:51,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:52:51,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-14 12:52:51,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:52:51,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:52:51,770 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:52:51,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:51,770 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:52:51,771 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:51,771 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:52:51,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:51,771 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:51,771 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:51,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:51,976 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:51,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:51,977 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-14 12:52:51,977 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:51,977 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817801828] [2020-09-14 12:52:51,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:51,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:52,258 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:52,258 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817801828] [2020-09-14 12:52:52,259 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [942404381] [2020-09-14 12:52:52,259 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:52,316 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:52,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:52,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:52,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:52,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:52,353 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:52,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:52,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:52:52,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [393962013] [2020-09-14 12:52:52,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:52:52,354 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:52,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:52:52,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:52:52,354 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:52:52,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:52,924 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-14 12:52:52,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:52:52,925 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:52:52,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:52,925 INFO L225 Difference]: With dead ends: 111 [2020-09-14 12:52:52,925 INFO L226 Difference]: Without dead ends: 105 [2020-09-14 12:52:52,926 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:52:52,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-14 12:52:52,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-14 12:52:52,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:52:52,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:52:52,929 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:52:52,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:52,929 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:52:52,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:52:52,929 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:52:52,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:52,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:52,930 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:53,140 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-14 12:52:53,140 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:53,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:53,141 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-14 12:52:53,141 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:53,142 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [749131517] [2020-09-14 12:52:53,142 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:53,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:53,417 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:53,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [749131517] [2020-09-14 12:52:53,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688248051] [2020-09-14 12:52:53,418 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:53,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:52:53,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:53,480 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:53,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:53,494 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:53,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:53,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:52:53,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1110754480] [2020-09-14 12:52:53,495 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:53,495 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:53,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:53,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:53,496 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:52:54,028 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:54,028 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-14 12:52:54,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:52:54,029 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:52:54,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:54,030 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:52:54,030 INFO L226 Difference]: Without dead ends: 102 [2020-09-14 12:52:54,030 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-09-14 12:52:54,031 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-14 12:52:54,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-14 12:52:54,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:52:54,033 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:52:54,033 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:52:54,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:54,033 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:52:54,033 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:54,033 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:52:54,034 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:54,034 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:54,034 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:54,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:54,241 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:54,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:54,242 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-14 12:52:54,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:54,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [249181442] [2020-09-14 12:52:54,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:54,253 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:54,516 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:54,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [249181442] [2020-09-14 12:52:54,517 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1676818625] [2020-09-14 12:52:54,517 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:54,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:52:54,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:54,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:54,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:54,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:54,624 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:54,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:54,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:52:54,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027644583] [2020-09-14 12:52:54,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:52:54,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:54,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:52:54,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:52:54,626 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:52:55,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:55,287 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-14 12:52:55,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:52:55,288 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:52:55,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:55,289 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:52:55,289 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:52:55,289 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:52:55,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:52:55,291 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-14 12:52:55,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:52:55,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:52:55,291 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:52:55,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:55,292 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:52:55,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:52:55,292 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:52:55,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:55,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:55,292 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:55,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-14 12:52:55,493 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:55,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:55,494 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-14 12:52:55,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:55,494 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [257605591] [2020-09-14 12:52:55,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:55,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:55,745 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:55,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [257605591] [2020-09-14 12:52:55,745 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1170683205] [2020-09-14 12:52:55,746 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:55,808 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:52:55,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:55,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:55,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:55,825 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:55,826 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:55,826 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:52:55,826 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391185578] [2020-09-14 12:52:55,826 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:55,826 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:55,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:55,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:55,827 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:52:56,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:56,433 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-14 12:52:56,438 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:52:56,438 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:52:56,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:56,439 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:52:56,439 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:52:56,440 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:52:56,440 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:52:56,441 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-14 12:52:56,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:52:56,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:52:56,442 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:52:56,442 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:56,442 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:52:56,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:56,442 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:52:56,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:56,443 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:56,443 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:56,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-14 12:52:56,651 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:56,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:56,652 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-14 12:52:56,652 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:56,652 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542813038] [2020-09-14 12:52:56,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:56,662 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:56,909 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:56,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542813038] [2020-09-14 12:52:56,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1106565574] [2020-09-14 12:52:56,910 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:56,974 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:52:56,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:56,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:56,976 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:57,000 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:57,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:57,016 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:57,016 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:52:57,016 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355987318] [2020-09-14 12:52:57,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:52:57,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:57,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:52:57,017 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:52:57,017 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:52:57,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:57,789 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-14 12:52:57,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:52:57,790 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:52:57,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:57,791 INFO L225 Difference]: With dead ends: 103 [2020-09-14 12:52:57,791 INFO L226 Difference]: Without dead ends: 97 [2020-09-14 12:52:57,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:52:57,792 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-14 12:52:57,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-14 12:52:57,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:52:57,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:52:57,794 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:52:57,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:57,794 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:52:57,794 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:52:57,795 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:52:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:57,795 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:57,795 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:58,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-14 12:52:58,002 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:58,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:58,003 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-14 12:52:58,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:58,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548614500] [2020-09-14 12:52:58,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:58,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:58,246 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:58,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548614500] [2020-09-14 12:52:58,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1875195857] [2020-09-14 12:52:58,247 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:58,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:58,308 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:58,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:58,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:58,327 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:58,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:52:58,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67490716] [2020-09-14 12:52:58,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:52:58,328 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:58,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:52:58,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:52:58,329 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:52:59,009 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:52:59,009 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-14 12:52:59,010 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:52:59,010 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:52:59,010 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:52:59,011 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:52:59,011 INFO L226 Difference]: Without dead ends: 94 [2020-09-14 12:52:59,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:52:59,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-14 12:52:59,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-14 12:52:59,014 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:52:59,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:52:59,015 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:52:59,015 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:52:59,015 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:52:59,015 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:52:59,016 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:52:59,016 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:52:59,016 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:52:59,016 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:52:59,225 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:59,225 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:52:59,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:52:59,226 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-14 12:52:59,226 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:52:59,226 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1582490917] [2020-09-14 12:52:59,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:52:59,236 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:52:59,471 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:59,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1582490917] [2020-09-14 12:52:59,471 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606344543] [2020-09-14 12:52:59,472 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:52:59,531 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:52:59,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:52:59,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:52:59,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:52:59,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:52:59,573 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:52:59,574 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:52:59,574 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:52:59,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832962223] [2020-09-14 12:52:59,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:52:59,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:52:59,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:52:59,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:52:59,575 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:53:00,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:00,439 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-14 12:53:00,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:53:00,440 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:00,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:00,441 INFO L225 Difference]: With dead ends: 99 [2020-09-14 12:53:00,441 INFO L226 Difference]: Without dead ends: 93 [2020-09-14 12:53:00,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:53:00,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-14 12:53:00,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-14 12:53:00,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:00,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:00,444 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:53:00,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:00,444 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:00,444 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:00,444 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:00,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:00,445 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:00,445 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:00,645 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-14 12:53:00,646 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:00,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:00,646 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-14 12:53:00,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:00,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082686038] [2020-09-14 12:53:00,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:00,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:00,879 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:00,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082686038] [2020-09-14 12:53:00,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [644615857] [2020-09-14 12:53:00,879 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:00,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:53:00,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:00,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:00,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:00,963 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:00,963 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:00,963 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:53:00,964 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2049199597] [2020-09-14 12:53:00,964 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:53:00,964 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:00,964 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:53:00,964 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:53:00,964 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:53:01,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:01,709 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-14 12:53:01,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:53:01,710 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:53:01,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:01,711 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:53:01,711 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:53:01,711 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:53:01,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:53:01,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-14 12:53:01,714 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:53:01,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:53:01,714 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:53:01,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:01,714 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:53:01,714 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:53:01,715 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:53:01,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:01,715 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:01,715 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:01,919 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:01,919 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:01,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:01,920 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-14 12:53:01,920 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:01,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [868073780] [2020-09-14 12:53:01,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:01,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:02,158 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:02,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [868073780] [2020-09-14 12:53:02,158 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1362458865] [2020-09-14 12:53:02,159 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:02,220 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:02,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:02,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:02,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:02,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:02,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:02,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:02,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564665400] [2020-09-14 12:53:02,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:02,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:02,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:02,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:02,266 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:53:03,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:03,244 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-14 12:53:03,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:53:03,244 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:03,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:03,245 INFO L225 Difference]: With dead ends: 95 [2020-09-14 12:53:03,245 INFO L226 Difference]: Without dead ends: 89 [2020-09-14 12:53:03,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:53:03,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-14 12:53:03,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-14 12:53:03,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:03,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:03,248 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:53:03,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:03,248 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:03,249 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:03,249 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:03,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:03,249 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:03,249 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:03,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:03,450 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:03,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:03,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-14 12:53:03,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:03,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570102821] [2020-09-14 12:53:03,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:03,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:03,678 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:03,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570102821] [2020-09-14 12:53:03,679 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [908748341] [2020-09-14 12:53:03,679 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:03,742 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-14 12:53:03,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:03,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:03,744 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:03,764 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:03,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:03,765 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:53:03,765 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1444818289] [2020-09-14 12:53:03,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:53:03,766 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:03,766 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:53:03,766 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:53:03,766 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:53:04,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:04,593 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-14 12:53:04,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:53:04,594 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:53:04,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:04,595 INFO L225 Difference]: With dead ends: 92 [2020-09-14 12:53:04,595 INFO L226 Difference]: Without dead ends: 86 [2020-09-14 12:53:04,595 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:53:04,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-14 12:53:04,596 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-14 12:53:04,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:53:04,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:53:04,597 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-14 12:53:04,597 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:04,597 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:53:04,597 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:53:04,598 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:53:04,598 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:04,598 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:04,598 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:04,806 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:04,806 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:04,807 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:04,807 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-14 12:53:04,807 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:04,807 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1288743661] [2020-09-14 12:53:04,808 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:04,818 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:04,998 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:04,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1288743661] [2020-09-14 12:53:04,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [394171832] [2020-09-14 12:53:04,999 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:05,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-14 12:53:05,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:05,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:05,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:05,104 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:05,121 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:05,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:05,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:05,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1250014212] [2020-09-14 12:53:05,122 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:05,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:05,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:05,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:05,122 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-14 12:53:06,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:06,176 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-14 12:53:06,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:53:06,177 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:06,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:06,178 INFO L225 Difference]: With dead ends: 91 [2020-09-14 12:53:06,178 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:53:06,178 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:53:06,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:53:06,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-14 12:53:06,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:06,181 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:06,181 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-14 12:53:06,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:06,181 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:06,181 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:06,181 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:06,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:06,181 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:06,182 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:06,382 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:06,382 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:06,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:06,383 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-14 12:53:06,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:06,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308796702] [2020-09-14 12:53:06,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:06,394 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:06,608 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:06,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308796702] [2020-09-14 12:53:06,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [382435477] [2020-09-14 12:53:06,609 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:06,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:06,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:06,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:06,690 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:06,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:06,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-14 12:53:06,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437864355] [2020-09-14 12:53:06,692 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-14 12:53:06,692 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:06,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-14 12:53:06,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-14 12:53:06,692 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-14 12:53:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:07,597 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-14 12:53:07,598 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:07,598 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-14 12:53:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:07,599 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:53:07,599 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:53:07,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:53:07,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:53:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-14 12:53:07,603 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-14 12:53:07,603 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-14 12:53:07,603 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-14 12:53:07,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:07,604 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-14 12:53:07,604 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-14 12:53:07,604 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-14 12:53:07,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:07,605 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:07,605 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:07,814 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-14 12:53:07,814 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:07,814 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:07,814 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-14 12:53:07,815 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:07,815 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [819327356] [2020-09-14 12:53:07,815 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:07,825 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:08,039 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:08,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [819327356] [2020-09-14 12:53:08,039 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882307487] [2020-09-14 12:53:08,040 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:08,099 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:08,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:08,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:08,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:08,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:08,156 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:08,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:08,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:08,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027744819] [2020-09-14 12:53:08,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:08,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:08,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:08,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:08,158 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-14 12:53:09,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:09,289 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-14 12:53:09,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:53:09,290 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:09,290 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:09,290 INFO L225 Difference]: With dead ends: 88 [2020-09-14 12:53:09,290 INFO L226 Difference]: Without dead ends: 80 [2020-09-14 12:53:09,291 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:53:09,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-14 12:53:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-14 12:53:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-14 12:53:09,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-14 12:53:09,293 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-14 12:53:09,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:09,294 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-14 12:53:09,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-14 12:53:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-14 12:53:09,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:09,294 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:09,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-14 12:53:09,495 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-14 12:53:09,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:09,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767490547] [2020-09-14 12:53:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:09,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:09,719 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:09,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767490547] [2020-09-14 12:53:09,720 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1673262198] [2020-09-14 12:53:09,720 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:09,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-14 12:53:09,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:09,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-14 12:53:09,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:09,809 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:53:09,829 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:09,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:09,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-14 12:53:09,830 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1302788562] [2020-09-14 12:53:09,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:09,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:09,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:09,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:09,832 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-14 12:53:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:10,860 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-14 12:53:10,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:10,861 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-14 12:53:10,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:10,862 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:53:10,862 INFO L226 Difference]: Without dead ends: 95 [2020-09-14 12:53:10,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:53:10,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-14 12:53:10,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-14 12:53:10,864 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:53:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-14 12:53:10,865 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-14 12:53:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:10,865 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-14 12:53:10,865 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-14 12:53:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:10,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:10,866 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:11,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-14 12:53:11,067 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:11,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:11,068 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-14 12:53:11,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:11,068 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573586606] [2020-09-14 12:53:11,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:11,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:11,316 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:11,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573586606] [2020-09-14 12:53:11,317 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [638592401] [2020-09-14 12:53:11,317 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:11,378 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:11,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:11,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:11,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:11,407 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:53:11,428 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:11,428 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:11,429 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:11,429 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285459033] [2020-09-14 12:53:11,429 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:11,429 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:11,430 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:11,430 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:11,430 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-14 12:53:12,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:12,567 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-14 12:53:12,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:12,568 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:12,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:12,569 INFO L225 Difference]: With dead ends: 84 [2020-09-14 12:53:12,569 INFO L226 Difference]: Without dead ends: 79 [2020-09-14 12:53:12,569 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:53:12,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-14 12:53:12,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-14 12:53:12,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-14 12:53:12,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-14 12:53:12,572 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-14 12:53:12,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:12,572 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-14 12:53:12,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:12,572 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-14 12:53:12,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:12,573 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:12,573 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:12,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-14 12:53:12,773 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:12,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:12,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-14 12:53:12,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:12,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804595993] [2020-09-14 12:53:12,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:12,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:13,086 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:13,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804595993] [2020-09-14 12:53:13,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2134892828] [2020-09-14 12:53:13,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:13,147 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:13,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:13,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:13,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:13,177 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:13,177 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:13,178 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:13,178 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381885694] [2020-09-14 12:53:13,178 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:13,178 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:13,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:13,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:13,178 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-14 12:53:13,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:13,663 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-14 12:53:13,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-14 12:53:13,664 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:13,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:13,665 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:53:13,665 INFO L226 Difference]: Without dead ends: 84 [2020-09-14 12:53:13,666 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-14 12:53:13,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-14 12:53:13,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-14 12:53:13,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:53:13,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-14 12:53:13,668 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-14 12:53:13,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:13,668 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-14 12:53:13,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:13,669 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-14 12:53:13,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:13,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:13,669 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:13,873 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:13,873 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:13,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:13,874 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-14 12:53:13,875 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:13,875 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1857902680] [2020-09-14 12:53:13,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:13,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:14,204 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:14,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1857902680] [2020-09-14 12:53:14,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202383360] [2020-09-14 12:53:14,205 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:14,267 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:14,268 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:14,269 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:14,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:14,297 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:14,308 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:14,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:14,309 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:14,309 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893445608] [2020-09-14 12:53:14,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:14,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:14,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:14,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:14,310 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-14 12:53:14,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:14,812 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-14 12:53:14,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-14 12:53:14,816 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:14,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:14,817 INFO L225 Difference]: With dead ends: 106 [2020-09-14 12:53:14,817 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:53:14,817 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:53:14,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:53:14,820 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-14 12:53:14,820 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-14 12:53:14,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-14 12:53:14,821 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-14 12:53:14,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:14,824 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-14 12:53:14,824 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:14,824 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-14 12:53:14,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:14,824 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:14,825 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:15,029 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-14 12:53:15,030 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:15,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:15,030 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-14 12:53:15,031 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:15,031 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2079308519] [2020-09-14 12:53:15,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:15,046 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:15,345 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:15,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2079308519] [2020-09-14 12:53:15,346 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [992122040] [2020-09-14 12:53:15,346 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:15,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:15,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:15,411 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:15,425 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:15,425 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:15,425 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:15,425 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413632281] [2020-09-14 12:53:15,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:15,426 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:15,426 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:15,426 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:15,426 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-14 12:53:15,997 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:15,998 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-14 12:53:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:53:15,999 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:15,999 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:53:15,999 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:53:16,000 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:53:16,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:53:16,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-14 12:53:16,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-14 12:53:16,003 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-14 12:53:16,003 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-14 12:53:16,003 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:16,003 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-14 12:53:16,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:16,003 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-14 12:53:16,004 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:16,004 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:16,004 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:16,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-14 12:53:16,205 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:16,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:16,205 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-14 12:53:16,206 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:16,206 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666936234] [2020-09-14 12:53:16,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:16,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:16,517 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:16,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666936234] [2020-09-14 12:53:16,518 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1379064208] [2020-09-14 12:53:16,518 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:16,584 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:16,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:16,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:16,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:16,630 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:16,643 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:16,644 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:16,644 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:16,644 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831624202] [2020-09-14 12:53:16,644 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:16,644 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:16,645 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:16,645 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:16,645 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-14 12:53:17,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:17,266 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-14 12:53:17,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:53:17,267 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:17,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:17,268 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:53:17,268 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:53:17,269 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:53:17,269 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:53:17,270 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-14 12:53:17,270 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:53:17,271 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-14 12:53:17,271 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-14 12:53:17,271 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:17,271 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-14 12:53:17,271 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:17,272 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-14 12:53:17,272 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:17,272 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:17,272 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:17,472 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-14 12:53:17,473 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:17,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:17,473 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-14 12:53:17,474 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:17,474 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [243378175] [2020-09-14 12:53:17,474 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:17,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:17,764 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:17,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [243378175] [2020-09-14 12:53:17,765 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885245054] [2020-09-14 12:53:17,766 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:17,828 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:17,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:17,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:17,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:17,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:17,847 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:17,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:17,848 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712936101] [2020-09-14 12:53:17,848 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:17,848 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:17,848 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:17,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:17,849 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-14 12:53:18,490 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:18,490 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-14 12:53:18,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:53:18,491 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:18,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:18,492 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:53:18,492 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:53:18,493 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:53:18,493 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:53:18,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-14 12:53:18,495 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:53:18,495 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-14 12:53:18,495 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-14 12:53:18,496 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:18,496 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-14 12:53:18,496 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:18,496 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-14 12:53:18,496 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:18,496 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:18,496 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:18,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:18,704 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:18,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:18,705 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-14 12:53:18,705 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:18,705 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1684559205] [2020-09-14 12:53:18,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:18,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:18,987 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:18,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1684559205] [2020-09-14 12:53:18,987 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [746698908] [2020-09-14 12:53:18,988 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:19,051 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:19,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:19,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:19,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:19,079 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:19,093 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:19,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:19,093 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:19,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1416602102] [2020-09-14 12:53:19,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:19,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:19,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:19,094 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:19,094 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-14 12:53:19,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:19,850 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-14 12:53:19,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:53:19,851 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:19,852 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:19,852 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:53:19,852 INFO L226 Difference]: Without dead ends: 110 [2020-09-14 12:53:19,853 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:53:19,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-14 12:53:19,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-14 12:53:19,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:53:19,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-14 12:53:19,855 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-14 12:53:19,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:19,855 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-14 12:53:19,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:19,855 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-14 12:53:19,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:19,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:19,856 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:20,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:20,057 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:20,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:20,057 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-14 12:53:20,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:20,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [454347754] [2020-09-14 12:53:20,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:20,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:20,316 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:20,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [454347754] [2020-09-14 12:53:20,316 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1391315637] [2020-09-14 12:53:20,317 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:20,400 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:20,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:20,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:20,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:20,436 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:20,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:20,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:20,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490175682] [2020-09-14 12:53:20,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:20,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:20,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:20,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:20,438 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-14 12:53:21,075 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:21,075 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-14 12:53:21,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:53:21,076 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:21,076 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:21,077 INFO L225 Difference]: With dead ends: 117 [2020-09-14 12:53:21,077 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:53:21,077 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:53:21,078 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:53:21,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-14 12:53:21,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-14 12:53:21,082 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-14 12:53:21,082 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-14 12:53:21,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:21,082 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-14 12:53:21,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:21,082 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-14 12:53:21,083 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:21,083 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:21,083 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:21,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:21,290 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:21,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:21,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-14 12:53:21,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:21,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [935207163] [2020-09-14 12:53:21,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:21,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:21,570 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:21,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [935207163] [2020-09-14 12:53:21,571 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752516496] [2020-09-14 12:53:21,571 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:21,635 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:21,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:21,637 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:21,637 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:21,671 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:21,686 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:21,687 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:21,687 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:21,687 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1781871920] [2020-09-14 12:53:21,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:21,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:21,688 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:21,688 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:21,688 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-14 12:53:22,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:22,544 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-14 12:53:22,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:53:22,545 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:22,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:22,545 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:53:22,546 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:53:22,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:53:22,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:53:22,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-14 12:53:22,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:53:22,548 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-14 12:53:22,548 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-14 12:53:22,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:22,548 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-14 12:53:22,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:22,549 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-14 12:53:22,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:22,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:22,549 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:22,757 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-14 12:53:22,757 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:22,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:22,758 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-14 12:53:22,758 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:22,758 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135337657] [2020-09-14 12:53:22,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:22,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:23,025 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:23,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135337657] [2020-09-14 12:53:23,026 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732223867] [2020-09-14 12:53:23,026 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:23,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:23,086 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:23,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:23,105 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:23,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:23,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:23,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [805347759] [2020-09-14 12:53:23,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:23,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:23,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:23,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:23,107 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-14 12:53:23,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:23,910 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-14 12:53:23,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:53:23,911 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:23,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:23,912 INFO L225 Difference]: With dead ends: 115 [2020-09-14 12:53:23,912 INFO L226 Difference]: Without dead ends: 109 [2020-09-14 12:53:23,913 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:53:23,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-14 12:53:23,915 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-14 12:53:23,915 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-14 12:53:23,915 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-14 12:53:23,915 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-14 12:53:23,916 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:23,916 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-14 12:53:23,916 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:23,916 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-14 12:53:23,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:23,916 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:23,917 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:24,122 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:24,123 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:24,123 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:24,123 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-14 12:53:24,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:24,124 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739752296] [2020-09-14 12:53:24,124 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:24,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:24,387 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:24,387 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739752296] [2020-09-14 12:53:24,388 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1058293259] [2020-09-14 12:53:24,388 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:24,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:24,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:24,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:24,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:24,480 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:24,495 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:24,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:24,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:24,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920877906] [2020-09-14 12:53:24,496 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:24,496 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:24,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:24,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:24,496 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-14 12:53:25,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:25,454 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-14 12:53:25,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:53:25,455 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:25,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:25,456 INFO L225 Difference]: With dead ends: 112 [2020-09-14 12:53:25,456 INFO L226 Difference]: Without dead ends: 106 [2020-09-14 12:53:25,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:53:25,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-14 12:53:25,458 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-14 12:53:25,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-14 12:53:25,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-14 12:53:25,459 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-14 12:53:25,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:25,459 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-14 12:53:25,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:25,460 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-14 12:53:25,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:25,460 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:25,460 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:25,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-14 12:53:25,661 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:25,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:25,661 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-14 12:53:25,662 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:25,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1440420464] [2020-09-14 12:53:25,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:25,672 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:25,927 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:25,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1440420464] [2020-09-14 12:53:25,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1704365173] [2020-09-14 12:53:25,928 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:25,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:25,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:25,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:25,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:26,012 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:26,013 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:26,013 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:26,013 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2126166146] [2020-09-14 12:53:26,013 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:26,013 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:26,014 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:26,014 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:26,014 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-14 12:53:26,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:26,871 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-14 12:53:26,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:26,872 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:26,873 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:26,873 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:53:26,873 INFO L226 Difference]: Without dead ends: 107 [2020-09-14 12:53:26,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:53:26,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-14 12:53:26,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-14 12:53:26,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:53:26,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-14 12:53:26,876 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-14 12:53:26,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:26,876 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-14 12:53:26,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:26,876 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-14 12:53:26,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:26,877 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:26,877 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:27,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-14 12:53:27,078 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:27,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:27,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-14 12:53:27,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:27,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979464579] [2020-09-14 12:53:27,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:27,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:27,341 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:27,341 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979464579] [2020-09-14 12:53:27,342 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [294867177] [2020-09-14 12:53:27,342 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:27,404 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:27,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:27,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:27,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:27,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:27,450 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:27,450 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:27,451 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:27,451 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [61691849] [2020-09-14 12:53:27,451 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:27,451 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:27,451 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:27,451 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:27,452 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-14 12:53:28,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:28,502 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-14 12:53:28,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:53:28,503 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:28,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:28,504 INFO L225 Difference]: With dead ends: 110 [2020-09-14 12:53:28,504 INFO L226 Difference]: Without dead ends: 104 [2020-09-14 12:53:28,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:53:28,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-14 12:53:28,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-14 12:53:28,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:53:28,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-14 12:53:28,507 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-14 12:53:28,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:28,507 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-14 12:53:28,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:28,508 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-14 12:53:28,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:28,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:28,508 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:28,709 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-14 12:53:28,709 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:28,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:28,710 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-14 12:53:28,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:28,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [112006071] [2020-09-14 12:53:28,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:28,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:28,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:28,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [112006071] [2020-09-14 12:53:28,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257314689] [2020-09-14 12:53:28,957 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:29,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:29,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:29,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:29,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:29,047 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:29,048 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:29,048 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:29,048 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778487531] [2020-09-14 12:53:29,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:29,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:29,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:29,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:29,049 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-14 12:53:29,957 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:29,957 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-14 12:53:29,958 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:53:29,958 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:29,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:29,959 INFO L225 Difference]: With dead ends: 111 [2020-09-14 12:53:29,959 INFO L226 Difference]: Without dead ends: 105 [2020-09-14 12:53:29,959 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:53:29,960 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-14 12:53:29,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-14 12:53:29,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-14 12:53:29,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-14 12:53:29,962 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-14 12:53:29,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:29,962 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-14 12:53:29,962 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:29,962 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-14 12:53:29,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:29,963 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:29,963 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:30,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:30,164 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:30,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:30,164 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-14 12:53:30,165 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:30,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064976810] [2020-09-14 12:53:30,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:30,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:30,420 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064976810] [2020-09-14 12:53:30,421 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486005247] [2020-09-14 12:53:30,421 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:30,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:30,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:30,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:30,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:30,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:30,534 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:30,535 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:30,535 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:30,535 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223711678] [2020-09-14 12:53:30,535 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:30,535 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:30,536 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:30,536 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:30,536 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-14 12:53:31,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:31,712 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-14 12:53:31,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:53:31,713 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:31,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:31,714 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:53:31,714 INFO L226 Difference]: Without dead ends: 102 [2020-09-14 12:53:31,715 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:53:31,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-14 12:53:31,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-14 12:53:31,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:53:31,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-14 12:53:31,717 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-14 12:53:31,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:31,718 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-14 12:53:31,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:31,718 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-14 12:53:31,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:31,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:31,718 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:31,921 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-14 12:53:31,921 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:31,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:31,922 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-14 12:53:31,922 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:31,922 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622311452] [2020-09-14 12:53:31,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:31,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:32,170 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:32,170 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622311452] [2020-09-14 12:53:32,171 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239947830] [2020-09-14 12:53:32,171 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:32,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:32,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:32,233 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:32,253 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:32,254 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:32,254 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-14 12:53:32,254 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913360030] [2020-09-14 12:53:32,254 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-14 12:53:32,254 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:32,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-14 12:53:32,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-14 12:53:32,255 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-14 12:53:33,252 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:33,252 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-14 12:53:33,254 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:53:33,255 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-14 12:53:33,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:33,255 INFO L225 Difference]: With dead ends: 128 [2020-09-14 12:53:33,255 INFO L226 Difference]: Without dead ends: 122 [2020-09-14 12:53:33,256 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:53:33,256 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-14 12:53:33,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-14 12:53:33,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:53:33,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-14 12:53:33,257 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-14 12:53:33,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:33,258 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-14 12:53:33,258 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-14 12:53:33,258 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-14 12:53:33,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-14 12:53:33,258 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:33,258 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:33,458 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:33,459 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:33,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:33,460 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-14 12:53:33,460 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:33,460 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386183775] [2020-09-14 12:53:33,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:33,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:33,707 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:33,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386183775] [2020-09-14 12:53:33,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701393229] [2020-09-14 12:53:33,708 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:33,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:33,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:33,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-14 12:53:33,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:33,796 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:33,814 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:33,814 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:33,814 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-14 12:53:33,815 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595560338] [2020-09-14 12:53:33,815 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:33,815 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:33,815 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:33,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:33,816 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-14 12:53:35,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:35,007 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-14 12:53:35,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:53:35,008 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-14 12:53:35,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:35,009 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:53:35,009 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:53:35,010 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:53:35,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:53:35,011 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-14 12:53:35,011 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-14 12:53:35,012 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-14 12:53:35,012 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-14 12:53:35,012 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:35,012 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-14 12:53:35,012 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:35,013 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-14 12:53:35,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:35,013 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:35,013 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:35,213 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:35,214 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:35,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:35,214 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-14 12:53:35,215 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:35,215 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371793652] [2020-09-14 12:53:35,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:35,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:35,569 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:35,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371793652] [2020-09-14 12:53:35,570 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858213218] [2020-09-14 12:53:35,570 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:35,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:35,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:35,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:35,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:35,652 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:35,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:35,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:35,652 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [639946168] [2020-09-14 12:53:35,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:35,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:35,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:35,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:35,653 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-14 12:53:36,216 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:36,216 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-14 12:53:36,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:53:36,217 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:36,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:36,218 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:53:36,218 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:53:36,219 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-09-14 12:53:36,219 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:53:36,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-14 12:53:36,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:36,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:36,222 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:36,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:36,222 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:36,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:36,222 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:36,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:36,222 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:36,223 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:36,430 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:36,430 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:36,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:36,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-14 12:53:36,431 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:36,431 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [809860369] [2020-09-14 12:53:36,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:36,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:36,794 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:36,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [809860369] [2020-09-14 12:53:36,795 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857237910] [2020-09-14 12:53:36,795 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:36,855 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:36,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:36,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:36,857 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:36,884 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:36,898 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:36,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:36,899 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:36,899 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1083276375] [2020-09-14 12:53:36,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:36,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:36,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:36,900 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:36,900 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:37,596 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:37,596 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-14 12:53:37,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:53:37,597 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:37,598 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:37,598 INFO L225 Difference]: With dead ends: 121 [2020-09-14 12:53:37,598 INFO L226 Difference]: Without dead ends: 115 [2020-09-14 12:53:37,598 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:53:37,599 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-14 12:53:37,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-14 12:53:37,600 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:37,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:37,600 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:37,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:37,600 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:37,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:37,600 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:37,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:37,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:37,601 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:37,801 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:37,802 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:37,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:37,802 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-14 12:53:37,802 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:37,803 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973291552] [2020-09-14 12:53:37,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:37,812 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:38,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:38,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973291552] [2020-09-14 12:53:38,137 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553223811] [2020-09-14 12:53:38,138 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:38,207 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:38,207 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:38,208 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:38,209 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:38,222 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:38,223 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:38,223 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:38,223 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [259594576] [2020-09-14 12:53:38,223 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:38,223 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:38,223 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:38,223 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:38,224 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:38,872 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:38,873 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-14 12:53:38,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:53:38,874 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:38,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:38,874 INFO L225 Difference]: With dead ends: 118 [2020-09-14 12:53:38,875 INFO L226 Difference]: Without dead ends: 112 [2020-09-14 12:53:38,875 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-09-14 12:53:38,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-14 12:53:38,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-14 12:53:38,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:38,877 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:38,877 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:38,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:38,877 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:38,878 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:38,878 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:38,878 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:38,878 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:38,878 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:39,079 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:39,079 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:39,079 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:39,080 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-14 12:53:39,080 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:39,080 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1657928474] [2020-09-14 12:53:39,080 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:39,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:39,419 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:39,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1657928474] [2020-09-14 12:53:39,419 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162571774] [2020-09-14 12:53:39,419 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:39,486 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:39,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:39,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:39,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:39,509 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:39,522 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:39,522 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:39,522 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1413859502] [2020-09-14 12:53:39,522 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:39,523 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:39,523 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:39,523 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:39,523 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:40,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:40,336 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-14 12:53:40,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:53:40,337 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:40,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:40,337 INFO L225 Difference]: With dead ends: 117 [2020-09-14 12:53:40,338 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:53:40,338 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:53:40,339 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:53:40,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-14 12:53:40,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:40,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:40,341 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:40,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:40,342 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:40,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:40,342 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:40,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:40,342 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:40,342 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:40,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-14 12:53:40,543 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:40,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:40,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-14 12:53:40,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:40,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1048406742] [2020-09-14 12:53:40,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:40,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:40,866 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:40,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1048406742] [2020-09-14 12:53:40,867 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [143891577] [2020-09-14 12:53:40,867 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:40,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:40,929 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:40,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:40,946 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:40,947 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:40,947 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:40,947 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2028636612] [2020-09-14 12:53:40,947 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:40,947 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:40,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:40,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:40,948 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:41,671 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:41,671 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-14 12:53:41,672 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:53:41,672 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:41,672 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:41,673 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:53:41,673 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:53:41,673 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:53:41,674 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:53:41,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-14 12:53:41,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:41,675 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:41,675 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:41,675 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:41,675 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:41,675 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:41,675 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:41,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:41,676 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:41,676 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:41,878 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-14 12:53:41,878 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:41,879 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:41,879 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-14 12:53:41,879 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:41,880 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1542985045] [2020-09-14 12:53:41,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:41,891 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:42,205 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:42,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1542985045] [2020-09-14 12:53:42,206 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475845541] [2020-09-14 12:53:42,206 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:42,267 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:42,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:42,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:42,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:42,302 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:42,319 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:42,319 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:42,319 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:42,319 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815323707] [2020-09-14 12:53:42,320 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:42,320 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:42,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:42,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:42,320 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:43,235 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:43,235 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-14 12:53:43,236 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:53:43,236 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:43,236 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:43,237 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:53:43,237 INFO L226 Difference]: Without dead ends: 107 [2020-09-14 12:53:43,237 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:53:43,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-14 12:53:43,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-14 12:53:43,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:43,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:43,240 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:43,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:43,240 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:43,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:43,241 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:43,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:43,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:43,241 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:43,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-14 12:53:43,451 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:43,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:43,452 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-14 12:53:43,452 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:43,452 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171380767] [2020-09-14 12:53:43,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:43,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:43,756 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:43,756 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171380767] [2020-09-14 12:53:43,757 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1606174653] [2020-09-14 12:53:43,757 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:43,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:43,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:43,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:43,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:43,848 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:43,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:43,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:43,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1872314377] [2020-09-14 12:53:43,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:43,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:43,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:43,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:43,850 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:44,605 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:44,605 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-14 12:53:44,606 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:53:44,606 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:44,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:44,607 INFO L225 Difference]: With dead ends: 110 [2020-09-14 12:53:44,607 INFO L226 Difference]: Without dead ends: 104 [2020-09-14 12:53:44,608 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:53:44,608 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-14 12:53:44,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-14 12:53:44,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:44,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:44,610 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:44,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:44,610 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:44,610 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:44,611 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:44,611 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:44,611 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:44,611 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:44,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-14 12:53:44,818 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:44,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:44,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-14 12:53:44,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:44,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1652366864] [2020-09-14 12:53:44,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:44,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:45,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:45,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1652366864] [2020-09-14 12:53:45,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102005299] [2020-09-14 12:53:45,121 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:45,182 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:45,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:45,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:45,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:45,217 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:45,234 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:45,234 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:45,234 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:45,234 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [895908505] [2020-09-14 12:53:45,234 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:45,235 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:45,235 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:45,235 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:45,235 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:46,258 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-14 12:53:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:53:46,259 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:46,259 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:46,260 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:53:46,260 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:53:46,261 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:53:46,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:53:46,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-14 12:53:46,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:46,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:46,263 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:46,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:46,263 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:46,263 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:46,263 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:46,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:46,263 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:46,263 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:46,464 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:46,464 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:46,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:46,465 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-14 12:53:46,465 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:46,465 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044113564] [2020-09-14 12:53:46,466 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:46,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:46,759 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:46,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044113564] [2020-09-14 12:53:46,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [220234480] [2020-09-14 12:53:46,760 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:46,825 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:46,825 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:46,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:46,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:46,853 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:46,854 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:46,854 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:46,854 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271768553] [2020-09-14 12:53:46,854 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:46,854 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:46,854 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:46,855 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:46,855 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:47,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:47,739 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-14 12:53:47,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:53:47,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:47,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:47,741 INFO L225 Difference]: With dead ends: 106 [2020-09-14 12:53:47,741 INFO L226 Difference]: Without dead ends: 100 [2020-09-14 12:53:47,742 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:53:47,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-14 12:53:47,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-14 12:53:47,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:47,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:47,744 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:47,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:47,744 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:47,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:47,744 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:47,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:47,744 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:47,744 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:47,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-14 12:53:47,945 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:47,946 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-14 12:53:47,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:47,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [507226560] [2020-09-14 12:53:47,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:47,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:48,246 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:48,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [507226560] [2020-09-14 12:53:48,247 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002966700] [2020-09-14 12:53:48,247 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:48,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:48,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:48,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:48,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:48,342 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:48,360 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:48,360 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:48,360 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:48,360 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487770861] [2020-09-14 12:53:48,361 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:48,361 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:48,361 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:48,361 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:48,361 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:49,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:49,495 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-14 12:53:49,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:53:49,496 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:49,496 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:49,496 INFO L225 Difference]: With dead ends: 105 [2020-09-14 12:53:49,496 INFO L226 Difference]: Without dead ends: 99 [2020-09-14 12:53:49,497 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:53:49,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-14 12:53:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-14 12:53:49,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:49,499 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:49,499 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:49,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:49,500 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:49,500 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:49,700 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:49,701 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:49,701 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:49,701 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-14 12:53:49,701 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:49,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1141782197] [2020-09-14 12:53:49,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:49,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:49,988 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:49,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1141782197] [2020-09-14 12:53:49,988 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [512930076] [2020-09-14 12:53:49,988 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:50,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:50,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:50,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:50,072 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:50,072 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:50,073 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:50,073 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1314384349] [2020-09-14 12:53:50,073 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:50,073 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:50,073 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:50,073 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:50,074 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:51,032 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:51,033 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-14 12:53:51,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:53:51,033 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:51,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:51,034 INFO L225 Difference]: With dead ends: 102 [2020-09-14 12:53:51,034 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:53:51,035 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:53:51,035 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:53:51,036 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-14 12:53:51,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:51,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:51,037 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:51,037 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:51,037 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:51,037 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:51,038 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:51,038 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:51,038 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:51,038 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:51,238 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:51,239 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:51,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:51,239 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-14 12:53:51,240 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:51,240 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896088036] [2020-09-14 12:53:51,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:51,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:51,497 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:51,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896088036] [2020-09-14 12:53:51,498 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1389346067] [2020-09-14 12:53:51,498 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:51,559 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:53:51,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:51,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:51,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:51,588 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:51,604 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:51,605 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:51,605 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:51,605 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1566305707] [2020-09-14 12:53:51,605 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:51,605 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:51,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:51,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:51,606 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:52,859 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:52,860 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-14 12:53:52,860 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:53:52,861 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:52,861 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:52,861 INFO L225 Difference]: With dead ends: 101 [2020-09-14 12:53:52,861 INFO L226 Difference]: Without dead ends: 95 [2020-09-14 12:53:52,862 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:53:52,862 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-14 12:53:52,863 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-14 12:53:52,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:52,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:52,873 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:52,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:52,874 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:52,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:52,874 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:52,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:52,874 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:52,874 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:53,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-14 12:53:53,083 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:53,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:53,084 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-14 12:53:53,084 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:53,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982754219] [2020-09-14 12:53:53,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:53,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:53,367 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:53,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982754219] [2020-09-14 12:53:53,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321545346] [2020-09-14 12:53:53,368 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:53,433 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-14 12:53:53,433 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:53,434 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:53,435 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:53,458 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:53,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:53,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:53,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500303023] [2020-09-14 12:53:53,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:53,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:53,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:53,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:53,460 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:54,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:54,512 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-14 12:53:54,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:53:54,513 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:54,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:54,514 INFO L225 Difference]: With dead ends: 98 [2020-09-14 12:53:54,514 INFO L226 Difference]: Without dead ends: 92 [2020-09-14 12:53:54,515 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:53:54,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-14 12:53:54,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-14 12:53:54,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:53:54,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:53:54,517 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-14 12:53:54,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:54,517 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:53:54,517 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:54,517 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:53:54,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:54,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:54,518 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:54,718 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:54,719 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:54,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:54,719 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-14 12:53:54,719 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:54,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [357622520] [2020-09-14 12:53:54,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:54,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:55,001 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:55,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [357622520] [2020-09-14 12:53:55,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420857876] [2020-09-14 12:53:55,002 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:55,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:53:55,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:55,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:55,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:55,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:55,115 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:55,115 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:55,116 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:55,116 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1355572167] [2020-09-14 12:53:55,116 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:55,116 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:55,116 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:55,116 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:55,117 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-14 12:53:56,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:56,482 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-14 12:53:56,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:53:56,483 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:53:56,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:56,483 INFO L225 Difference]: With dead ends: 97 [2020-09-14 12:53:56,484 INFO L226 Difference]: Without dead ends: 91 [2020-09-14 12:53:56,484 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:53:56,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-14 12:53:56,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-14 12:53:56,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:53:56,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:53:56,487 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-14 12:53:56,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:56,487 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:53:56,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:53:56,487 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:53:56,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:56,487 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:56,487 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:56,688 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-14 12:53:56,688 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:56,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:56,689 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-14 12:53:56,689 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:56,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [279361446] [2020-09-14 12:53:56,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:56,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:56,973 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:56,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [279361446] [2020-09-14 12:53:56,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532385556] [2020-09-14 12:53:56,974 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:57,037 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-14 12:53:57,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:57,039 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:57,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:57,080 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:57,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:57,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-14 12:53:57,081 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364588005] [2020-09-14 12:53:57,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-14 12:53:57,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:57,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-14 12:53:57,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-14 12:53:57,082 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-14 12:53:58,153 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:53:58,153 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-14 12:53:58,154 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:53:58,154 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-14 12:53:58,155 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:53:58,155 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:53:58,155 INFO L226 Difference]: Without dead ends: 107 [2020-09-14 12:53:58,156 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:53:58,156 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-14 12:53:58,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-14 12:53:58,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-14 12:53:58,158 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-14 12:53:58,158 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-14 12:53:58,158 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:53:58,158 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-14 12:53:58,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-14 12:53:58,158 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-14 12:53:58,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:53:58,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:53:58,159 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:53:58,359 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-14 12:53:58,359 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:53:58,360 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:53:58,360 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-14 12:53:58,360 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:53:58,360 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1642629012] [2020-09-14 12:53:58,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:53:58,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:53:58,639 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:58,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1642629012] [2020-09-14 12:53:58,640 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002964293] [2020-09-14 12:53:58,640 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:53:58,705 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-14 12:53:58,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:53:58,706 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:53:58,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:53:58,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:53:58,754 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:53:58,754 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:53:58,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:53:58,755 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1845511120] [2020-09-14 12:53:58,755 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:53:58,755 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:53:58,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:53:58,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:53:58,756 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-14 12:54:00,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:00,188 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-14 12:54:00,189 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:54:00,189 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:54:00,189 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:00,190 INFO L225 Difference]: With dead ends: 94 [2020-09-14 12:54:00,190 INFO L226 Difference]: Without dead ends: 86 [2020-09-14 12:54:00,190 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:54:00,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-14 12:54:00,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-14 12:54:00,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-14 12:54:00,193 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-14 12:54:00,193 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-14 12:54:00,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:00,193 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-14 12:54:00,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:00,193 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-14 12:54:00,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-14 12:54:00,193 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:00,193 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:00,394 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-14 12:54:00,394 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:00,394 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:00,395 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-14 12:54:00,395 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:00,395 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1435595799] [2020-09-14 12:54:00,395 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:00,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:00,679 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:00,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1435595799] [2020-09-14 12:54:00,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2034149226] [2020-09-14 12:54:00,680 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:00,741 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:00,742 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-14 12:54:00,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:00,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:54:00,799 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:00,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:00,800 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-14 12:54:00,800 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564385527] [2020-09-14 12:54:00,800 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:00,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:00,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:00,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:00,801 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-14 12:54:02,116 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:02,116 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-14 12:54:02,117 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:54:02,117 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-14 12:54:02,117 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:02,118 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:54:02,118 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:54:02,118 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:54:02,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:54:02,120 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-14 12:54:02,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:54:02,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-14 12:54:02,121 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-14 12:54:02,121 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:02,121 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-14 12:54:02,121 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:02,121 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-14 12:54:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:02,121 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:02,121 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:02,322 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-14 12:54:02,322 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:02,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:02,323 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-14 12:54:02,323 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:02,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340773400] [2020-09-14 12:54:02,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:02,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:02,630 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:02,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340773400] [2020-09-14 12:54:02,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1235713739] [2020-09-14 12:54:02,631 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:02,692 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:02,692 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:02,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:02,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:02,727 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:54:02,749 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:02,750 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:02,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:02,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108458294] [2020-09-14 12:54:02,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:02,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:02,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:02,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:02,751 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-14 12:54:04,181 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:04,182 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-14 12:54:04,183 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:54:04,183 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:04,183 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:04,183 INFO L225 Difference]: With dead ends: 90 [2020-09-14 12:54:04,184 INFO L226 Difference]: Without dead ends: 85 [2020-09-14 12:54:04,184 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:54:04,185 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-14 12:54:04,186 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-14 12:54:04,186 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-14 12:54:04,186 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-14 12:54:04,186 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-14 12:54:04,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:04,186 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-14 12:54:04,187 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:04,187 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-14 12:54:04,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:04,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:04,187 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:04,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:04,388 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:04,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:04,388 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-14 12:54:04,389 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:04,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1187474260] [2020-09-14 12:54:04,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:04,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:04,781 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:04,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1187474260] [2020-09-14 12:54:04,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453726075] [2020-09-14 12:54:04,782 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:04,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:04,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:04,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:04,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:04,871 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:04,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:04,872 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:04,872 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776078616] [2020-09-14 12:54:04,872 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:04,872 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:04,872 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:04,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:04,872 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-14 12:54:05,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:05,486 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-14 12:54:05,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-14 12:54:05,487 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:05,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:05,488 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:54:05,488 INFO L226 Difference]: Without dead ends: 90 [2020-09-14 12:54:05,488 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-09-14 12:54:05,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-14 12:54:05,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-14 12:54:05,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:54:05,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-14 12:54:05,491 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-14 12:54:05,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:05,491 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-14 12:54:05,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:05,491 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-14 12:54:05,492 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:05,492 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:05,492 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:05,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:05,693 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:05,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:05,693 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-14 12:54:05,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:05,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1000358038] [2020-09-14 12:54:05,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:05,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:06,096 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:06,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1000358038] [2020-09-14 12:54:06,096 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779098069] [2020-09-14 12:54:06,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:06,159 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:06,159 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:06,160 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:06,161 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:06,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:06,201 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:06,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:06,202 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:06,202 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847464916] [2020-09-14 12:54:06,202 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:06,202 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:06,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:06,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:06,202 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-14 12:54:06,830 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:06,830 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-14 12:54:06,831 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-14 12:54:06,831 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:06,831 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:06,832 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:54:06,832 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:54:06,833 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-09-14 12:54:06,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:54:06,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-14 12:54:06,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-14 12:54:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-14 12:54:06,835 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-14 12:54:06,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:06,836 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-14 12:54:06,836 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:06,836 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-14 12:54:06,836 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:06,836 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:06,836 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:07,037 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:07,037 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:07,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:07,038 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-14 12:54:07,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:07,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871080088] [2020-09-14 12:54:07,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:07,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:07,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871080088] [2020-09-14 12:54:07,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673286755] [2020-09-14 12:54:07,423 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:07,488 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:07,489 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:07,490 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:07,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:07,503 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:07,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:07,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:07,504 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1372051109] [2020-09-14 12:54:07,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:07,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:07,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:07,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:07,504 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-14 12:54:08,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:08,224 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-14 12:54:08,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:54:08,225 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:08,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:08,226 INFO L225 Difference]: With dead ends: 115 [2020-09-14 12:54:08,226 INFO L226 Difference]: Without dead ends: 109 [2020-09-14 12:54:08,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:54:08,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-14 12:54:08,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-14 12:54:08,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-14 12:54:08,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-14 12:54:08,228 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-14 12:54:08,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:08,228 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-14 12:54:08,228 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:08,228 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-14 12:54:08,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:08,229 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:08,229 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:08,432 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:08,432 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:08,433 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:08,433 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-14 12:54:08,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:08,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1256066258] [2020-09-14 12:54:08,434 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:08,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:08,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:08,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1256066258] [2020-09-14 12:54:08,820 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1355440203] [2020-09-14 12:54:08,820 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:08,886 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:08,886 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:08,887 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:08,888 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:08,920 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:08,935 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:08,935 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:08,935 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:08,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2077421980] [2020-09-14 12:54:08,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:08,936 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:08,936 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:08,936 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:08,936 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-14 12:54:09,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:09,704 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-14 12:54:09,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:54:09,705 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:09,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:09,706 INFO L225 Difference]: With dead ends: 129 [2020-09-14 12:54:09,706 INFO L226 Difference]: Without dead ends: 123 [2020-09-14 12:54:09,707 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:54:09,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-14 12:54:09,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-14 12:54:09,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:54:09,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-14 12:54:09,709 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-14 12:54:09,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:09,709 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-14 12:54:09,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:09,709 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-14 12:54:09,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:09,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:09,710 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:09,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:09,911 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:09,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:09,911 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-14 12:54:09,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:09,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1675104110] [2020-09-14 12:54:09,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:09,922 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:10,276 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:10,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1675104110] [2020-09-14 12:54:10,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509657642] [2020-09-14 12:54:10,277 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:10,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:10,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:10,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:10,356 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:10,356 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:10,356 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:10,356 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1322306030] [2020-09-14 12:54:10,357 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:10,357 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:10,357 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:10,357 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:10,357 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-14 12:54:11,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:11,174 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-14 12:54:11,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:54:11,175 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:11,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:11,176 INFO L225 Difference]: With dead ends: 129 [2020-09-14 12:54:11,176 INFO L226 Difference]: Without dead ends: 123 [2020-09-14 12:54:11,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:54:11,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-14 12:54:11,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-14 12:54:11,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-14 12:54:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-14 12:54:11,179 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-14 12:54:11,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:11,179 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-14 12:54:11,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:11,179 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-14 12:54:11,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:11,179 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:11,179 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:11,380 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:11,380 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:11,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:11,381 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-14 12:54:11,381 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:11,381 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919033783] [2020-09-14 12:54:11,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:11,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:11,742 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:11,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919033783] [2020-09-14 12:54:11,743 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616213943] [2020-09-14 12:54:11,743 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:11,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:11,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:11,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:11,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:11,839 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:11,852 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:11,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:11,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:11,853 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242342214] [2020-09-14 12:54:11,853 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:11,853 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:11,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:11,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:11,853 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-14 12:54:12,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:12,770 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-14 12:54:12,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:54:12,771 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:12,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:12,772 INFO L225 Difference]: With dead ends: 126 [2020-09-14 12:54:12,772 INFO L226 Difference]: Without dead ends: 120 [2020-09-14 12:54:12,772 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:54:12,773 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-14 12:54:12,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-14 12:54:12,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-14 12:54:12,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-14 12:54:12,775 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-14 12:54:12,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:12,775 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-14 12:54:12,775 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:12,776 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-14 12:54:12,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:12,776 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:12,776 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:12,976 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:12,977 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:12,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:12,977 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-14 12:54:12,978 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:12,978 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [818787034] [2020-09-14 12:54:12,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:12,988 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:13,325 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:13,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [818787034] [2020-09-14 12:54:13,326 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051258027] [2020-09-14 12:54:13,326 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:13,393 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:13,394 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:13,396 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:13,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:13,414 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:13,414 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:13,414 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:13,414 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332588478] [2020-09-14 12:54:13,414 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:13,415 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:13,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:13,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:13,416 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-14 12:54:14,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:14,299 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-14 12:54:14,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:54:14,300 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:14,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:14,300 INFO L225 Difference]: With dead ends: 127 [2020-09-14 12:54:14,301 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:54:14,301 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:54:14,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:54:14,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-14 12:54:14,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:54:14,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-14 12:54:14,303 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-14 12:54:14,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:14,304 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-14 12:54:14,304 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:14,304 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-14 12:54:14,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:14,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:14,304 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:14,505 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-14 12:54:14,505 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:14,505 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:14,506 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-14 12:54:14,506 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:14,506 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1218654379] [2020-09-14 12:54:14,506 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:14,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:14,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:14,854 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1218654379] [2020-09-14 12:54:14,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1895314475] [2020-09-14 12:54:14,855 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:14,917 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:14,917 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:14,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:14,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:14,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:14,965 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:14,965 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:14,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:14,966 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727648745] [2020-09-14 12:54:14,966 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:14,966 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:14,966 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:14,966 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:14,966 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-14 12:54:15,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:15,987 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-14 12:54:15,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:54:15,988 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:15,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:15,989 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:54:15,989 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:54:15,990 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:54:15,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:54:15,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-14 12:54:15,992 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:54:15,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-14 12:54:15,992 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-14 12:54:15,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:15,992 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-14 12:54:15,992 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:15,992 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-14 12:54:15,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:15,993 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:15,993 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:16,193 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-14 12:54:16,194 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:16,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:16,194 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-14 12:54:16,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:16,195 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752584610] [2020-09-14 12:54:16,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:16,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:16,534 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:16,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752584610] [2020-09-14 12:54:16,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [693365290] [2020-09-14 12:54:16,535 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:16,602 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:16,603 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:16,604 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:16,605 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:16,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:16,624 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:16,624 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:16,624 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [938433288] [2020-09-14 12:54:16,624 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:16,624 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:16,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:16,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:16,625 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-14 12:54:17,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:17,544 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-14 12:54:17,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:54:17,544 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:17,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:17,545 INFO L225 Difference]: With dead ends: 125 [2020-09-14 12:54:17,545 INFO L226 Difference]: Without dead ends: 119 [2020-09-14 12:54:17,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:54:17,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-14 12:54:17,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-14 12:54:17,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-14 12:54:17,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-14 12:54:17,548 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-14 12:54:17,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:17,548 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-14 12:54:17,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:17,548 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-14 12:54:17,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:17,549 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:17,549 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:17,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-14 12:54:17,749 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:17,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:17,750 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-14 12:54:17,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:17,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265434819] [2020-09-14 12:54:17,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:17,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:18,090 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:18,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265434819] [2020-09-14 12:54:18,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1125219304] [2020-09-14 12:54:18,092 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:18,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:18,192 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:18,210 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:18,211 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:18,211 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:18,211 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1532933214] [2020-09-14 12:54:18,211 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:18,211 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:18,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:18,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:18,212 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-14 12:54:19,332 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:19,333 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-14 12:54:19,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:54:19,334 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:19,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:19,335 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:54:19,335 INFO L226 Difference]: Without dead ends: 116 [2020-09-14 12:54:19,335 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:54:19,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-14 12:54:19,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-14 12:54:19,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:54:19,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-14 12:54:19,338 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-14 12:54:19,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:19,338 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-14 12:54:19,338 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:19,338 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-14 12:54:19,338 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:19,338 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:19,338 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:19,539 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-14 12:54:19,539 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:19,540 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:19,540 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-14 12:54:19,540 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:19,541 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967043344] [2020-09-14 12:54:19,541 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:19,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:19,839 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:19,839 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967043344] [2020-09-14 12:54:19,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [834404238] [2020-09-14 12:54:19,840 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:19,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:19,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:19,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:19,931 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:19,932 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:19,932 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:19,932 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129991763] [2020-09-14 12:54:19,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:19,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:19,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:19,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:19,933 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-14 12:54:20,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:20,965 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-14 12:54:20,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:54:20,966 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:20,966 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:20,967 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:54:20,967 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:54:20,967 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:54:20,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:54:20,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-14 12:54:20,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-14 12:54:20,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-14 12:54:20,972 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-14 12:54:20,972 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:20,972 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-14 12:54:20,972 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:20,972 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-14 12:54:20,972 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:20,973 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:20,973 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:21,173 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:21,174 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:21,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:21,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-14 12:54:21,174 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:21,175 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946446524] [2020-09-14 12:54:21,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:21,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:21,500 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:21,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946446524] [2020-09-14 12:54:21,501 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1248320468] [2020-09-14 12:54:21,501 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:21,563 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:21,563 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:21,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:21,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:21,595 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:21,614 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:21,614 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:21,615 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:21,615 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005613370] [2020-09-14 12:54:21,615 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:21,615 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:21,615 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:21,615 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:21,615 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-14 12:54:22,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:22,850 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-14 12:54:22,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:54:22,851 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:22,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:22,852 INFO L225 Difference]: With dead ends: 120 [2020-09-14 12:54:22,852 INFO L226 Difference]: Without dead ends: 114 [2020-09-14 12:54:22,852 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:54:22,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-14 12:54:22,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-14 12:54:22,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-14 12:54:22,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-14 12:54:22,855 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-14 12:54:22,855 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:22,855 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-14 12:54:22,855 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:22,856 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-14 12:54:22,856 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:22,856 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:22,856 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:23,057 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:23,057 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:23,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:23,058 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-14 12:54:23,058 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:23,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536073435] [2020-09-14 12:54:23,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:23,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:23,372 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:23,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536073435] [2020-09-14 12:54:23,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217043451] [2020-09-14 12:54:23,373 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:23,445 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:23,446 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:23,471 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:23,471 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:23,471 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:23,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [571107972] [2020-09-14 12:54:23,472 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:23,472 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:23,472 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:23,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:23,472 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-14 12:54:24,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:24,584 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-14 12:54:24,585 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:54:24,585 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:24,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:24,586 INFO L225 Difference]: With dead ends: 121 [2020-09-14 12:54:24,586 INFO L226 Difference]: Without dead ends: 115 [2020-09-14 12:54:24,586 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:54:24,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-14 12:54:24,588 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-14 12:54:24,588 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:54:24,588 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-14 12:54:24,588 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-14 12:54:24,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:24,589 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-14 12:54:24,589 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:24,589 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-14 12:54:24,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:24,589 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:24,589 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:24,790 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-14 12:54:24,790 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:24,790 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:24,791 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-14 12:54:24,791 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:24,791 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574010131] [2020-09-14 12:54:24,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:24,802 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:25,102 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:25,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574010131] [2020-09-14 12:54:25,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [609718163] [2020-09-14 12:54:25,103 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:25,165 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:25,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:25,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:25,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:25,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:25,225 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:25,226 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:25,226 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:25,226 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [910104290] [2020-09-14 12:54:25,226 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:25,227 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:25,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:25,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:25,227 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-14 12:54:26,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:26,566 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-14 12:54:26,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:54:26,567 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:26,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:26,567 INFO L225 Difference]: With dead ends: 118 [2020-09-14 12:54:26,567 INFO L226 Difference]: Without dead ends: 112 [2020-09-14 12:54:26,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-09-14 12:54:26,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-14 12:54:26,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-14 12:54:26,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:54:26,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-14 12:54:26,569 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-14 12:54:26,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:26,569 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-14 12:54:26,569 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:26,570 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-14 12:54:26,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:26,570 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:26,570 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:26,770 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:26,771 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:26,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:26,771 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-14 12:54:26,772 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:26,772 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502338761] [2020-09-14 12:54:26,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:26,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:27,087 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:27,087 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502338761] [2020-09-14 12:54:27,088 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1933984578] [2020-09-14 12:54:27,088 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:27,154 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:27,155 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:27,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:27,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:27,182 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:27,182 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:27,182 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:27,183 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348438148] [2020-09-14 12:54:27,183 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:27,183 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:27,183 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:27,183 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:27,183 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-14 12:54:28,324 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:28,325 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-14 12:54:28,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-14 12:54:28,325 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:28,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:28,326 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:54:28,326 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:54:28,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:54:28,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:54:28,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-14 12:54:28,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-14 12:54:28,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-14 12:54:28,330 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-14 12:54:28,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:28,330 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-14 12:54:28,330 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:28,330 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-14 12:54:28,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:28,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:28,331 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:28,538 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:28,538 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:28,539 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:28,539 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-14 12:54:28,539 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:28,539 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135921495] [2020-09-14 12:54:28,540 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:28,550 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:28,854 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:28,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135921495] [2020-09-14 12:54:28,855 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689890275] [2020-09-14 12:54:28,855 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:28,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:28,920 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:28,922 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:28,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:28,953 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:28,971 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:28,972 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:28,972 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:28,972 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117215099] [2020-09-14 12:54:28,973 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:28,973 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:28,973 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:28,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:28,974 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-14 12:54:30,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:30,420 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-14 12:54:30,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:54:30,421 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:30,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:30,421 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:54:30,421 INFO L226 Difference]: Without dead ends: 110 [2020-09-14 12:54:30,422 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:54:30,422 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-14 12:54:30,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-14 12:54:30,424 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:54:30,424 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-14 12:54:30,425 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-14 12:54:30,425 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:30,425 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-14 12:54:30,425 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:30,425 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-14 12:54:30,425 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:30,425 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:30,425 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:30,626 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:30,626 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:30,626 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:30,627 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-14 12:54:30,627 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:30,627 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158938939] [2020-09-14 12:54:30,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:30,638 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:30,947 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:30,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158938939] [2020-09-14 12:54:30,948 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [522156465] [2020-09-14 12:54:30,948 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:31,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:31,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:31,011 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:31,036 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:31,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:31,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-14 12:54:31,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63590490] [2020-09-14 12:54:31,038 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-14 12:54:31,038 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:31,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-14 12:54:31,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-14 12:54:31,039 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-14 12:54:32,293 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:32,294 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-14 12:54:32,294 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:54:32,295 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-14 12:54:32,295 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:32,295 INFO L225 Difference]: With dead ends: 136 [2020-09-14 12:54:32,296 INFO L226 Difference]: Without dead ends: 130 [2020-09-14 12:54:32,296 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-09-14 12:54:32,297 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-14 12:54:32,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-14 12:54:32,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-14 12:54:32,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-14 12:54:32,299 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-14 12:54:32,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:32,299 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-14 12:54:32,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-14 12:54:32,299 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-14 12:54:32,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-14 12:54:32,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:32,300 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:32,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:32,510 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:32,510 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:32,511 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-14 12:54:32,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:32,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205460468] [2020-09-14 12:54:32,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:32,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:32,823 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:32,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205460468] [2020-09-14 12:54:32,823 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1544604788] [2020-09-14 12:54:32,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:32,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:32,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:32,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-14 12:54:32,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:32,923 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:32,945 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:32,945 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:32,945 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-14 12:54:32,946 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9206652] [2020-09-14 12:54:32,946 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:32,946 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:32,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:32,946 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:32,946 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-14 12:54:34,449 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:34,449 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-14 12:54:34,450 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-14 12:54:34,450 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-14 12:54:34,450 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:34,451 INFO L225 Difference]: With dead ends: 117 [2020-09-14 12:54:34,451 INFO L226 Difference]: Without dead ends: 109 [2020-09-14 12:54:34,452 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-09-14 12:54:34,452 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-14 12:54:34,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-14 12:54:34,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-14 12:54:34,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-14 12:54:34,454 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-14 12:54:34,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:34,454 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-14 12:54:34,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:34,454 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-14 12:54:34,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:34,455 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:34,455 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:34,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:34,656 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:34,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:34,656 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-14 12:54:34,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:34,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117843463] [2020-09-14 12:54:34,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:34,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:35,095 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:35,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117843463] [2020-09-14 12:54:35,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058737016] [2020-09-14 12:54:35,095 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:35,165 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:35,165 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:35,166 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:35,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:35,180 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:35,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:35,180 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:35,180 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [601304622] [2020-09-14 12:54:35,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:35,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:35,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:35,181 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:35,181 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-14 12:54:35,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:35,910 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-14 12:54:35,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:54:35,911 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:35,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:35,911 INFO L225 Difference]: With dead ends: 134 [2020-09-14 12:54:35,912 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:54:35,912 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-09-14 12:54:35,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:54:35,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-14 12:54:35,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:35,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:35,915 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:35,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:35,915 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:35,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:35,915 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:35,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:35,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:35,915 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:36,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-14 12:54:36,116 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:36,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:36,117 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-14 12:54:36,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:36,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [563342668] [2020-09-14 12:54:36,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:36,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:36,562 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:36,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [563342668] [2020-09-14 12:54:36,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1107576741] [2020-09-14 12:54:36,563 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:36,625 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:36,625 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:36,626 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:36,627 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:36,657 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:36,679 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:36,680 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:36,680 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990542706] [2020-09-14 12:54:36,680 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:36,680 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:36,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:36,680 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:36,680 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:37,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:37,520 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-14 12:54:37,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:54:37,521 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:37,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:37,522 INFO L225 Difference]: With dead ends: 131 [2020-09-14 12:54:37,522 INFO L226 Difference]: Without dead ends: 125 [2020-09-14 12:54:37,523 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:54:37,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-14 12:54:37,524 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-14 12:54:37,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:37,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:37,530 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:37,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:37,530 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:37,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:37,530 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:37,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:37,530 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:37,531 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:37,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-14 12:54:37,732 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:37,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:37,732 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-14 12:54:37,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:37,733 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787302909] [2020-09-14 12:54:37,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:37,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:38,151 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:38,151 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787302909] [2020-09-14 12:54:38,152 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1499706698] [2020-09-14 12:54:38,152 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:38,220 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:38,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:38,222 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:38,222 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:38,238 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:38,238 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:38,238 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:38,238 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950933989] [2020-09-14 12:54:38,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:38,239 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:38,239 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:38,239 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:38,239 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:39,041 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:39,041 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-14 12:54:39,042 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:54:39,042 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:39,042 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:39,043 INFO L225 Difference]: With dead ends: 128 [2020-09-14 12:54:39,043 INFO L226 Difference]: Without dead ends: 122 [2020-09-14 12:54:39,044 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-09-14 12:54:39,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-14 12:54:39,045 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-14 12:54:39,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:39,046 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:39,046 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:39,046 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:39,046 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:39,046 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:39,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:39,046 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:39,047 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:39,247 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:39,247 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:39,248 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:39,248 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-14 12:54:39,248 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:39,248 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49274177] [2020-09-14 12:54:39,249 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:39,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:39,675 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:39,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49274177] [2020-09-14 12:54:39,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1003479264] [2020-09-14 12:54:39,676 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:39,744 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:39,744 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:39,745 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:39,746 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:39,779 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:39,795 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:39,795 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:39,795 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:39,796 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2031176573] [2020-09-14 12:54:39,796 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:39,796 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:39,796 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:40,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:40,755 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-14 12:54:40,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:54:40,756 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:40,756 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:40,756 INFO L225 Difference]: With dead ends: 127 [2020-09-14 12:54:40,757 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:54:40,757 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-14 12:54:40,757 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:54:40,759 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-14 12:54:40,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:40,759 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:40,760 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:40,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:40,760 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:40,760 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:40,760 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:40,760 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:40,760 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:40,760 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:40,961 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-14 12:54:40,961 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:40,962 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:40,962 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-14 12:54:40,962 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:40,962 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757104809] [2020-09-14 12:54:40,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:40,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:41,356 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:41,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757104809] [2020-09-14 12:54:41,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981008719] [2020-09-14 12:54:41,357 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:41,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:41,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:41,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:41,436 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:41,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:41,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:41,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597036118] [2020-09-14 12:54:41,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:41,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:41,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:41,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:41,438 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:42,312 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:42,312 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-14 12:54:42,313 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:54:42,313 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:42,313 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:42,314 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:54:42,314 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:54:42,314 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:54:42,315 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:54:42,316 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-14 12:54:42,316 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:42,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:42,317 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:42,317 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:42,317 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:42,317 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:42,317 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:42,318 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:42,318 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:42,318 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:42,518 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:42,519 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:42,519 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:42,519 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-14 12:54:42,519 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:42,520 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601899617] [2020-09-14 12:54:42,520 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:42,530 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:42,919 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:42,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601899617] [2020-09-14 12:54:42,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951803042] [2020-09-14 12:54:42,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:42,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:42,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:42,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:42,983 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:43,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:43,029 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:43,029 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:43,029 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:43,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937027372] [2020-09-14 12:54:43,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:43,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:43,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:43,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:43,030 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:44,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:44,057 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-14 12:54:44,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:54:44,058 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:44,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:44,059 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:54:44,059 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:54:44,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:54:44,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:54:44,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-14 12:54:44,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:44,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:44,062 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:44,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:44,062 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:44,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:44,062 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:44,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:44,062 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:44,062 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:44,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:44,263 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:44,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:44,264 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-14 12:54:44,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:44,264 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498242549] [2020-09-14 12:54:44,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:44,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:44,643 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:44,643 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498242549] [2020-09-14 12:54:44,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1164088078] [2020-09-14 12:54:44,644 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:44,710 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:44,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:44,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:44,735 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:44,735 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:44,735 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:44,736 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1337232630] [2020-09-14 12:54:44,736 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:44,736 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:44,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:44,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:44,736 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:45,681 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:45,682 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-14 12:54:45,683 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:54:45,683 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:45,683 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:45,684 INFO L225 Difference]: With dead ends: 120 [2020-09-14 12:54:45,684 INFO L226 Difference]: Without dead ends: 114 [2020-09-14 12:54:45,684 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:54:45,685 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-14 12:54:45,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-14 12:54:45,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:45,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:45,686 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:45,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:45,686 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:45,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:45,686 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:45,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:45,686 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:45,687 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:45,887 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:45,888 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:45,888 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:45,888 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-14 12:54:45,888 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:45,889 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [171764763] [2020-09-14 12:54:45,889 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:45,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:46,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [171764763] [2020-09-14 12:54:46,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2111496556] [2020-09-14 12:54:46,268 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:46,325 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:46,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:46,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:46,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:46,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:46,380 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:46,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:46,380 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:46,380 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2105401658] [2020-09-14 12:54:46,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:46,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:46,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:46,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:46,381 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:47,594 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:47,594 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-14 12:54:47,595 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:54:47,596 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:47,596 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:47,596 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:54:47,597 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:54:47,597 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:54:47,598 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:54:47,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-14 12:54:47,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:47,600 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:47,600 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:47,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:47,600 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:47,600 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:47,600 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:47,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:47,601 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:47,601 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:47,810 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:47,810 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:47,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:47,811 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-14 12:54:47,811 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:47,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345788841] [2020-09-14 12:54:47,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:47,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:48,189 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:48,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345788841] [2020-09-14 12:54:48,189 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1316471104] [2020-09-14 12:54:48,190 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:48,256 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:54:48,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:48,257 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:48,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:48,278 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:48,279 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:48,279 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:48,279 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507039688] [2020-09-14 12:54:48,280 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:48,280 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:48,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:48,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:48,280 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:49,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:49,346 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-14 12:54:49,347 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:54:49,347 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:49,347 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:49,348 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:54:49,348 INFO L226 Difference]: Without dead ends: 110 [2020-09-14 12:54:49,348 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:54:49,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-14 12:54:49,350 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-14 12:54:49,350 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:49,350 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:49,351 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:49,351 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:49,351 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:49,351 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:49,351 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:49,351 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:49,351 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:49,351 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:49,552 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-14 12:54:49,552 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:49,553 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:49,553 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-14 12:54:49,553 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:49,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1279450428] [2020-09-14 12:54:49,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:49,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:49,936 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:49,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1279450428] [2020-09-14 12:54:49,937 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2049016979] [2020-09-14 12:54:49,937 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:50,003 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:54:50,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:50,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:50,005 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:50,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:50,053 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:50,054 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:50,054 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:50,054 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645150945] [2020-09-14 12:54:50,054 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:50,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:50,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:50,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:50,055 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:51,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:51,427 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-14 12:54:51,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:54:51,428 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:51,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:51,430 INFO L225 Difference]: With dead ends: 115 [2020-09-14 12:54:51,430 INFO L226 Difference]: Without dead ends: 109 [2020-09-14 12:54:51,430 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:54:51,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-14 12:54:51,433 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-14 12:54:51,433 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:51,433 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:51,433 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:51,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:51,434 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:51,434 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:51,434 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:51,434 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:51,434 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:51,434 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:51,644 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:51,644 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:51,644 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:51,645 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-14 12:54:51,645 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:51,645 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [993827779] [2020-09-14 12:54:51,645 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:51,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:52,014 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:52,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [993827779] [2020-09-14 12:54:52,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [117891322] [2020-09-14 12:54:52,015 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:52,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:52,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:52,080 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:52,103 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:52,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:52,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:52,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130646679] [2020-09-14 12:54:52,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:52,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:52,105 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:52,105 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:52,105 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:53,267 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:53,268 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-14 12:54:53,268 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:54:53,269 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:53,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:53,270 INFO L225 Difference]: With dead ends: 112 [2020-09-14 12:54:53,270 INFO L226 Difference]: Without dead ends: 106 [2020-09-14 12:54:53,270 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:54:53,271 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-14 12:54:53,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-14 12:54:53,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:53,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:53,272 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:53,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:53,273 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:53,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:53,273 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:53,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:53,273 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:53,273 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:53,473 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-14 12:54:53,474 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:53,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:53,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-14 12:54:53,475 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:53,475 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148049551] [2020-09-14 12:54:53,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:53,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:53,840 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:53,840 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148049551] [2020-09-14 12:54:53,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [421423263] [2020-09-14 12:54:53,841 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:53,907 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:54:53,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:53,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:53,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:53,940 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:53,960 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:53,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:53,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:53,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [465673557] [2020-09-14 12:54:53,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:53,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:53,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:53,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:53,962 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:55,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:55,389 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-14 12:54:55,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:54:55,390 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:55,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:55,391 INFO L225 Difference]: With dead ends: 111 [2020-09-14 12:54:55,391 INFO L226 Difference]: Without dead ends: 105 [2020-09-14 12:54:55,391 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:54:55,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-14 12:54:55,393 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-14 12:54:55,393 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:55,393 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:55,393 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:55,393 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:55,394 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:55,394 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:55,394 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:55,394 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:55,394 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:55,394 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:55,597 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-14 12:54:55,597 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:55,598 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-14 12:54:55,598 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:55,598 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408977434] [2020-09-14 12:54:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:55,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:55,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:55,942 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408977434] [2020-09-14 12:54:55,943 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1097014050] [2020-09-14 12:54:55,943 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:56,012 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:54:56,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:56,013 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:56,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:56,040 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:56,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:56,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:54:56,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [330086110] [2020-09-14 12:54:56,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:54:56,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:56,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:54:56,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:54:56,041 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:54:57,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:57,273 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-14 12:54:57,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:54:57,274 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:54:57,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:57,275 INFO L225 Difference]: With dead ends: 108 [2020-09-14 12:54:57,275 INFO L226 Difference]: Without dead ends: 102 [2020-09-14 12:54:57,275 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-09-14 12:54:57,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-14 12:54:57,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-14 12:54:57,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:54:57,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:54:57,277 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:54:57,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:57,277 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:54:57,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:54:57,278 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:54:57,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:57,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:57,278 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:57,482 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:57,482 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:57,483 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:57,483 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-14 12:54:57,483 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:57,484 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1072419736] [2020-09-14 12:54:57,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:57,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:54:57,843 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:57,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1072419736] [2020-09-14 12:54:57,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1047618598] [2020-09-14 12:54:57,844 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:57,905 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:54:57,905 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:54:57,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:54:57,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:54:57,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:54:57,960 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:54:57,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:54:57,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:54:57,961 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [861097571] [2020-09-14 12:54:57,961 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:54:57,961 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:54:57,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:54:57,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:54:57,962 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:54:59,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:54:59,556 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-14 12:54:59,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:54:59,557 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:54:59,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:54:59,558 INFO L225 Difference]: With dead ends: 107 [2020-09-14 12:54:59,558 INFO L226 Difference]: Without dead ends: 101 [2020-09-14 12:54:59,559 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-09-14 12:54:59,560 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-14 12:54:59,561 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-14 12:54:59,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:54:59,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:54:59,561 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:54:59,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:54:59,562 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:54:59,562 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:54:59,562 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:54:59,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:54:59,562 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:54:59,562 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:54:59,765 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:54:59,765 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:54:59,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:54:59,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-14 12:54:59,766 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:54:59,767 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612325427] [2020-09-14 12:54:59,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:54:59,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:00,121 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:00,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612325427] [2020-09-14 12:55:00,121 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537547696] [2020-09-14 12:55:00,121 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:00,189 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-14 12:55:00,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:00,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:00,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:00,218 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:00,219 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:00,219 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:55:00,219 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1503111546] [2020-09-14 12:55:00,219 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:55:00,219 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:00,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:55:00,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:55:00,220 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:55:01,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:01,543 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-14 12:55:01,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-14 12:55:01,544 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:55:01,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:01,545 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:55:01,545 INFO L226 Difference]: Without dead ends: 98 [2020-09-14 12:55:01,545 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:55:01,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-14 12:55:01,547 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-14 12:55:01,547 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:55:01,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:55:01,547 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-14 12:55:01,548 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:01,548 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:55:01,548 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:55:01,548 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:55:01,548 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:01,548 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:01,548 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:01,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:01,749 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:01,749 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:01,750 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-14 12:55:01,750 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:01,750 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1128554838] [2020-09-14 12:55:01,750 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:01,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:02,108 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:02,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1128554838] [2020-09-14 12:55:02,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [344504519] [2020-09-14 12:55:02,109 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:02,193 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-14 12:55:02,193 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:02,194 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:02,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:02,229 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:02,251 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:02,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:02,252 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:55:02,252 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [468736279] [2020-09-14 12:55:02,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:02,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:02,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:02,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:02,252 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-14 12:55:04,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:04,002 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-14 12:55:04,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-14 12:55:04,004 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:55:04,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:04,004 INFO L225 Difference]: With dead ends: 103 [2020-09-14 12:55:04,004 INFO L226 Difference]: Without dead ends: 97 [2020-09-14 12:55:04,005 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-09-14 12:55:04,005 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-14 12:55:04,006 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-14 12:55:04,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:55:04,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:55:04,007 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-14 12:55:04,007 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:04,007 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:55:04,007 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:04,007 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:55:04,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:04,007 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:04,008 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:04,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-14 12:55:04,215 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:04,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:04,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-14 12:55:04,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:04,216 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2142274347] [2020-09-14 12:55:04,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:04,231 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:04,581 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:04,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2142274347] [2020-09-14 12:55:04,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864322854] [2020-09-14 12:55:04,583 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:04,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:04,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:04,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:04,685 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:04,686 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:04,686 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-14 12:55:04,686 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1184709704] [2020-09-14 12:55:04,687 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-14 12:55:04,687 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:04,687 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-14 12:55:04,687 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-14 12:55:04,688 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-14 12:55:06,103 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:06,103 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-14 12:55:06,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:55:06,104 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-14 12:55:06,104 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:06,105 INFO L225 Difference]: With dead ends: 119 [2020-09-14 12:55:06,105 INFO L226 Difference]: Without dead ends: 113 [2020-09-14 12:55:06,105 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-09-14 12:55:06,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-14 12:55:06,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-14 12:55:06,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-14 12:55:06,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-14 12:55:06,107 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-14 12:55:06,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:06,107 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-14 12:55:06,107 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-14 12:55:06,107 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-14 12:55:06,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:06,108 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:06,108 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:06,308 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:06,309 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:06,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:06,309 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-14 12:55:06,309 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:06,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525846434] [2020-09-14 12:55:06,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:06,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:06,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525846434] [2020-09-14 12:55:06,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317056728] [2020-09-14 12:55:06,655 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:06,719 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:06,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:06,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:06,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:06,750 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:06,773 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:06,774 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:06,774 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:55:06,774 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [271694934] [2020-09-14 12:55:06,775 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:06,775 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:06,775 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:06,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:06,775 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-14 12:55:08,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:08,497 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-14 12:55:08,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-14 12:55:08,498 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:55:08,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:08,499 INFO L225 Difference]: With dead ends: 100 [2020-09-14 12:55:08,499 INFO L226 Difference]: Without dead ends: 92 [2020-09-14 12:55:08,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-09-14 12:55:08,500 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-14 12:55:08,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-14 12:55:08,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-14 12:55:08,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-14 12:55:08,502 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-14 12:55:08,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:08,502 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-14 12:55:08,502 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:08,502 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-14 12:55:08,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-14 12:55:08,502 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:08,503 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:08,703 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:08,703 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:08,704 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:08,704 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-14 12:55:08,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:08,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [959593198] [2020-09-14 12:55:08,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:08,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:09,056 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:09,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [959593198] [2020-09-14 12:55:09,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514398944] [2020-09-14 12:55:09,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:09,130 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-14 12:55:09,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:09,132 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-14 12:55:09,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:09,163 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:55:09,190 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:09,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:09,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-14 12:55:09,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [411975907] [2020-09-14 12:55:09,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:09,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:09,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:09,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:09,192 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-14 12:55:10,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:10,861 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-14 12:55:10,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:55:10,862 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-14 12:55:10,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:10,862 INFO L225 Difference]: With dead ends: 116 [2020-09-14 12:55:10,863 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:55:10,863 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-14 12:55:10,863 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:55:10,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-14 12:55:10,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-14 12:55:10,865 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-14 12:55:10,865 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-14 12:55:10,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:10,865 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-14 12:55:10,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:10,866 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-14 12:55:10,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:10,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:10,866 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:11,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:11,069 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:11,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:11,070 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-14 12:55:11,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:11,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956707244] [2020-09-14 12:55:11,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:11,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:11,453 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:11,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956707244] [2020-09-14 12:55:11,454 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068506538] [2020-09-14 12:55:11,454 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:11,519 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:11,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:11,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:11,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:11,557 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:55:11,590 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:11,590 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:11,590 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:11,590 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977871653] [2020-09-14 12:55:11,591 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:11,591 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:11,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:11,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:11,591 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-14 12:55:13,429 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:13,430 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-14 12:55:13,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:55:13,431 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:13,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:13,432 INFO L225 Difference]: With dead ends: 96 [2020-09-14 12:55:13,432 INFO L226 Difference]: Without dead ends: 91 [2020-09-14 12:55:13,433 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-09-14 12:55:13,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-14 12:55:13,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-14 12:55:13,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-14 12:55:13,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-14 12:55:13,436 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-14 12:55:13,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:13,436 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-14 12:55:13,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:13,437 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-14 12:55:13,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:13,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:13,437 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:13,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:13,646 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:13,646 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:13,646 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-14 12:55:13,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:13,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081811677] [2020-09-14 12:55:13,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:13,656 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:14,127 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:14,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081811677] [2020-09-14 12:55:14,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322498060] [2020-09-14 12:55:14,128 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:14,192 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:55:14,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:14,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:14,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:14,205 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:14,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:14,206 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:14,206 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456580346] [2020-09-14 12:55:14,206 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:14,206 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:14,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:14,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:14,206 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-14 12:55:14,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:14,947 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-14 12:55:14,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-14 12:55:14,948 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:14,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:14,949 INFO L225 Difference]: With dead ends: 102 [2020-09-14 12:55:14,949 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:55:14,949 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-09-14 12:55:14,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:55:14,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-14 12:55:14,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:55:14,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-14 12:55:14,952 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-14 12:55:14,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:14,952 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-14 12:55:14,952 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:14,952 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-14 12:55:14,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:14,953 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:14,953 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:15,153 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-14 12:55:15,153 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:15,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:15,154 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-14 12:55:15,154 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:15,155 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [57776519] [2020-09-14 12:55:15,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:15,643 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:15,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [57776519] [2020-09-14 12:55:15,644 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2048975609] [2020-09-14 12:55:15,644 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:15,709 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:55:15,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:15,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:15,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:15,743 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:15,755 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:15,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:15,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:15,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [422222971] [2020-09-14 12:55:15,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:15,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:15,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:15,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:15,756 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-14 12:55:16,612 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:16,612 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-14 12:55:16,613 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-14 12:55:16,613 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:16,614 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:16,614 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:55:16,614 INFO L226 Difference]: Without dead ends: 116 [2020-09-14 12:55:16,615 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-09-14 12:55:16,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-14 12:55:16,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-14 12:55:16,616 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-14 12:55:16,616 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-14 12:55:16,616 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-14 12:55:16,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:16,617 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-14 12:55:16,617 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:16,617 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-14 12:55:16,617 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:16,617 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:16,617 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:16,818 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-14 12:55:16,818 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:16,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:16,819 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-14 12:55:16,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:16,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [780774708] [2020-09-14 12:55:16,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:16,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:17,302 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:17,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [780774708] [2020-09-14 12:55:17,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [504329287] [2020-09-14 12:55:17,303 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:17,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:17,365 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:17,366 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:17,380 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:17,380 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:17,381 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:17,381 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [243257922] [2020-09-14 12:55:17,381 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:17,381 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:17,381 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:17,381 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:17,382 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-14 12:55:18,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:18,236 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-14 12:55:18,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:55:18,237 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:18,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:18,238 INFO L225 Difference]: With dead ends: 123 [2020-09-14 12:55:18,238 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:55:18,238 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:55:18,239 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:55:18,240 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-14 12:55:18,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-14 12:55:18,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-14 12:55:18,240 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-14 12:55:18,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:18,241 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-14 12:55:18,241 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:18,241 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-14 12:55:18,241 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:18,241 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:18,242 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:18,442 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-14 12:55:18,442 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:18,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:18,443 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-14 12:55:18,443 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:18,444 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134556383] [2020-09-14 12:55:18,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:18,454 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:18,920 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:18,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134556383] [2020-09-14 12:55:18,921 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1849117668] [2020-09-14 12:55:18,921 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:18,981 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:18,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:18,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:18,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:19,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:19,030 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:19,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:19,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:19,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156642458] [2020-09-14 12:55:19,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:19,031 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:19,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:19,031 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:19,031 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-14 12:55:19,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:19,988 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-14 12:55:19,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:55:19,989 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:19,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:19,990 INFO L225 Difference]: With dead ends: 139 [2020-09-14 12:55:19,990 INFO L226 Difference]: Without dead ends: 133 [2020-09-14 12:55:19,991 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:55:19,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-14 12:55:19,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-14 12:55:19,993 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-14 12:55:19,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-14 12:55:19,994 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-14 12:55:19,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:19,994 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-14 12:55:19,994 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:19,994 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-14 12:55:19,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:19,995 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:19,995 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:20,203 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-14 12:55:20,203 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:20,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:20,204 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-14 12:55:20,204 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:20,204 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340553643] [2020-09-14 12:55:20,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:20,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:20,667 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:20,667 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340553643] [2020-09-14 12:55:20,668 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [34728112] [2020-09-14 12:55:20,668 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:20,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:55:20,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:20,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:20,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:20,762 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:20,763 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:20,763 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:20,763 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [649264740] [2020-09-14 12:55:20,763 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:20,764 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:20,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:20,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:20,764 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-14 12:55:21,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:21,748 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-14 12:55:21,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:55:21,749 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:21,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:21,750 INFO L225 Difference]: With dead ends: 139 [2020-09-14 12:55:21,750 INFO L226 Difference]: Without dead ends: 133 [2020-09-14 12:55:21,750 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:55:21,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-14 12:55:21,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-14 12:55:21,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-14 12:55:21,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-14 12:55:21,753 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-14 12:55:21,753 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:21,753 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-14 12:55:21,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:21,753 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-14 12:55:21,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:21,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:21,754 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:21,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:21,955 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:21,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:21,955 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-14 12:55:21,956 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:21,956 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [607429661] [2020-09-14 12:55:21,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:21,967 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:22,412 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:22,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [607429661] [2020-09-14 12:55:22,412 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1395178327] [2020-09-14 12:55:22,412 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:22,472 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:22,472 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:22,473 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:22,474 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:22,507 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:22,523 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:22,523 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:22,523 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:22,523 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1839492492] [2020-09-14 12:55:22,524 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:22,524 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:22,524 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:22,524 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:22,524 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-09-14 12:55:23,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:23,622 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-09-14 12:55:23,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:55:23,623 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:23,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:23,624 INFO L225 Difference]: With dead ends: 136 [2020-09-14 12:55:23,624 INFO L226 Difference]: Without dead ends: 130 [2020-09-14 12:55:23,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:55:23,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-14 12:55:23,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-09-14 12:55:23,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-14 12:55:23,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-09-14 12:55:23,627 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-09-14 12:55:23,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:23,627 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-09-14 12:55:23,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:23,627 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-09-14 12:55:23,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:23,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:23,627 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:23,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-14 12:55:23,828 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:23,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:23,829 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-09-14 12:55:23,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:23,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952249821] [2020-09-14 12:55:23,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:23,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:24,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:24,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952249821] [2020-09-14 12:55:24,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [829278591] [2020-09-14 12:55:24,273 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:24,347 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:55:24,347 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:24,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:24,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:24,367 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:24,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:24,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:24,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [720809192] [2020-09-14 12:55:24,367 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:24,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:24,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:24,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:24,368 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-09-14 12:55:25,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:25,465 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-09-14 12:55:25,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:55:25,466 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:25,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:25,467 INFO L225 Difference]: With dead ends: 137 [2020-09-14 12:55:25,467 INFO L226 Difference]: Without dead ends: 131 [2020-09-14 12:55:25,468 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:55:25,468 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-14 12:55:25,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-09-14 12:55:25,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-14 12:55:25,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-09-14 12:55:25,471 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-09-14 12:55:25,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:25,471 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-09-14 12:55:25,471 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:25,471 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-09-14 12:55:25,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:25,471 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:25,471 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:25,672 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:25,672 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:25,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:25,673 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-09-14 12:55:25,673 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:25,673 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1425973861] [2020-09-14 12:55:25,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:26,109 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:26,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1425973861] [2020-09-14 12:55:26,110 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1527160502] [2020-09-14 12:55:26,110 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:26,186 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:55:26,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:26,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:26,189 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:26,232 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:26,250 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:26,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:26,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:26,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520560974] [2020-09-14 12:55:26,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:26,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:26,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:26,251 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:26,252 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-09-14 12:55:27,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:27,491 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-09-14 12:55:27,492 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:55:27,492 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:27,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:27,493 INFO L225 Difference]: With dead ends: 134 [2020-09-14 12:55:27,493 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:55:27,494 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:55:27,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:55:27,495 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-09-14 12:55:27,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-14 12:55:27,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-09-14 12:55:27,498 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-09-14 12:55:27,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:27,499 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-09-14 12:55:27,499 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:27,499 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-09-14 12:55:27,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:27,499 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:27,499 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:27,701 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-09-14 12:55:27,701 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:27,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:27,702 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-09-14 12:55:27,702 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:27,702 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332508168] [2020-09-14 12:55:27,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:27,714 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:28,128 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:28,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332508168] [2020-09-14 12:55:28,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251789994] [2020-09-14 12:55:28,129 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:28,191 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:28,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:28,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:28,213 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:28,213 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:28,213 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:28,213 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374661676] [2020-09-14 12:55:28,214 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:28,214 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:28,214 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:28,214 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:28,214 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-09-14 12:55:29,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:29,373 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-09-14 12:55:29,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:55:29,374 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:29,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:29,375 INFO L225 Difference]: With dead ends: 135 [2020-09-14 12:55:29,375 INFO L226 Difference]: Without dead ends: 129 [2020-09-14 12:55:29,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:55:29,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-09-14 12:55:29,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-09-14 12:55:29,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-14 12:55:29,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-09-14 12:55:29,378 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-09-14 12:55:29,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:29,378 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-09-14 12:55:29,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:29,378 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-09-14 12:55:29,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:29,378 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:29,378 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:29,579 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:29,579 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:29,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:29,580 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-09-14 12:55:29,580 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:29,580 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686125540] [2020-09-14 12:55:29,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:29,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:29,998 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:29,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686125540] [2020-09-14 12:55:29,999 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1026910867] [2020-09-14 12:55:29,999 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:30,071 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:30,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:30,073 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:30,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:30,106 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:30,126 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:30,126 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:30,126 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:30,126 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1603639185] [2020-09-14 12:55:30,126 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:30,127 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:30,127 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:30,127 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:30,127 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-09-14 12:55:31,478 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:31,478 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-09-14 12:55:31,479 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:55:31,480 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:31,480 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:31,480 INFO L225 Difference]: With dead ends: 132 [2020-09-14 12:55:31,480 INFO L226 Difference]: Without dead ends: 126 [2020-09-14 12:55:31,481 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-09-14 12:55:31,481 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-09-14 12:55:31,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-09-14 12:55:31,483 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-14 12:55:31,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-09-14 12:55:31,484 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-09-14 12:55:31,484 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:31,484 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-09-14 12:55:31,484 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:31,484 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-09-14 12:55:31,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:31,484 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:31,484 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:31,685 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:31,685 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:31,685 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:31,686 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-09-14 12:55:31,686 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:31,686 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625470753] [2020-09-14 12:55:31,686 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:31,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:32,098 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:32,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625470753] [2020-09-14 12:55:32,099 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1223197786] [2020-09-14 12:55:32,099 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:32,171 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:55:32,171 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:32,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:32,173 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:32,197 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:32,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:32,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:32,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1705933938] [2020-09-14 12:55:32,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:32,198 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:32,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:32,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:32,199 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-09-14 12:55:33,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:33,454 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-09-14 12:55:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:55:33,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:33,456 INFO L225 Difference]: With dead ends: 133 [2020-09-14 12:55:33,456 INFO L226 Difference]: Without dead ends: 127 [2020-09-14 12:55:33,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:55:33,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-14 12:55:33,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-09-14 12:55:33,467 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-14 12:55:33,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-09-14 12:55:33,467 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-09-14 12:55:33,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:33,467 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-09-14 12:55:33,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:33,467 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-09-14 12:55:33,468 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:33,468 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:33,468 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:33,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:33,669 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:33,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:33,669 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-09-14 12:55:33,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:33,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [438257932] [2020-09-14 12:55:33,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:33,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:34,079 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:34,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [438257932] [2020-09-14 12:55:34,080 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126912988] [2020-09-14 12:55:34,080 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:34,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:34,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:34,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:34,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:34,182 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:34,200 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:34,201 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:34,201 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:34,201 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1278295820] [2020-09-14 12:55:34,201 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:34,201 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:34,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:34,202 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:34,202 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-09-14 12:55:35,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:35,680 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-09-14 12:55:35,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:55:35,681 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:35,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:35,682 INFO L225 Difference]: With dead ends: 130 [2020-09-14 12:55:35,682 INFO L226 Difference]: Without dead ends: 124 [2020-09-14 12:55:35,683 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:55:35,683 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-14 12:55:35,685 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-09-14 12:55:35,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-14 12:55:35,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-09-14 12:55:35,686 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-09-14 12:55:35,686 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:35,686 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-09-14 12:55:35,686 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:35,686 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-09-14 12:55:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:35,687 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:35,687 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:35,895 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:35,895 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:35,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:35,896 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-09-14 12:55:35,896 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:35,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609413212] [2020-09-14 12:55:35,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:35,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:36,288 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:36,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609413212] [2020-09-14 12:55:36,289 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [460665151] [2020-09-14 12:55:36,289 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:36,356 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:55:36,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:36,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:36,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:36,389 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:36,389 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:36,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907328507] [2020-09-14 12:55:36,390 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:36,390 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:36,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:36,390 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-09-14 12:55:37,726 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:37,727 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-09-14 12:55:37,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-14 12:55:37,728 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:37,728 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:37,728 INFO L225 Difference]: With dead ends: 131 [2020-09-14 12:55:37,728 INFO L226 Difference]: Without dead ends: 125 [2020-09-14 12:55:37,728 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-09-14 12:55:37,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-14 12:55:37,730 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-09-14 12:55:37,730 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-14 12:55:37,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-09-14 12:55:37,731 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-09-14 12:55:37,731 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:37,731 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-09-14 12:55:37,731 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:37,731 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-09-14 12:55:37,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:37,731 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:37,732 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:37,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-09-14 12:55:37,936 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:37,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:37,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-09-14 12:55:37,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:37,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861791981] [2020-09-14 12:55:37,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:37,950 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:38,344 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:38,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861791981] [2020-09-14 12:55:38,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554480291] [2020-09-14 12:55:38,345 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:38,413 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:55:38,413 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:38,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:38,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:38,450 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:38,472 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:38,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:38,473 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:38,473 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [185318583] [2020-09-14 12:55:38,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:38,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:38,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:38,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:38,474 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-09-14 12:55:40,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:40,100 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-09-14 12:55:40,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:55:40,101 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:40,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:40,101 INFO L225 Difference]: With dead ends: 128 [2020-09-14 12:55:40,101 INFO L226 Difference]: Without dead ends: 122 [2020-09-14 12:55:40,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-09-14 12:55:40,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-14 12:55:40,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-09-14 12:55:40,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-14 12:55:40,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-09-14 12:55:40,104 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-09-14 12:55:40,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:40,104 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-09-14 12:55:40,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:40,105 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-09-14 12:55:40,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:40,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:40,105 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:40,305 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-09-14 12:55:40,306 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:40,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:40,306 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-09-14 12:55:40,306 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:40,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295259368] [2020-09-14 12:55:40,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:40,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:40,708 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:40,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295259368] [2020-09-14 12:55:40,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [719546802] [2020-09-14 12:55:40,708 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:40,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:40,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:40,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:40,800 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:40,800 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:40,801 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:40,801 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682908872] [2020-09-14 12:55:40,801 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:40,801 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:40,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:40,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:40,802 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-09-14 12:55:42,233 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:42,233 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-09-14 12:55:42,235 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:55:42,235 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:42,235 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:42,235 INFO L225 Difference]: With dead ends: 129 [2020-09-14 12:55:42,236 INFO L226 Difference]: Without dead ends: 123 [2020-09-14 12:55:42,236 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-09-14 12:55:42,236 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-14 12:55:42,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-09-14 12:55:42,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-14 12:55:42,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-14 12:55:42,238 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-09-14 12:55:42,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:42,239 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-14 12:55:42,239 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:42,239 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-14 12:55:42,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:42,239 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:42,239 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:42,439 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-09-14 12:55:42,440 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:42,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:42,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-09-14 12:55:42,441 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:42,441 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2041257730] [2020-09-14 12:55:42,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:42,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:42,843 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:42,843 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2041257730] [2020-09-14 12:55:42,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776638942] [2020-09-14 12:55:42,844 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:42,905 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:42,906 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:42,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:42,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:42,943 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:42,966 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:42,967 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:42,967 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:42,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1841934399] [2020-09-14 12:55:42,968 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:42,968 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:42,968 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:42,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:42,968 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-09-14 12:55:44,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:44,705 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-09-14 12:55:44,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-14 12:55:44,707 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:44,707 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:44,707 INFO L225 Difference]: With dead ends: 126 [2020-09-14 12:55:44,707 INFO L226 Difference]: Without dead ends: 120 [2020-09-14 12:55:44,708 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-09-14 12:55:44,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-14 12:55:44,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-09-14 12:55:44,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-14 12:55:44,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-14 12:55:44,710 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-09-14 12:55:44,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:44,710 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-14 12:55:44,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:44,710 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-14 12:55:44,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:44,710 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:44,710 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:44,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-09-14 12:55:44,911 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:44,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:44,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-09-14 12:55:44,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:44,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [286604619] [2020-09-14 12:55:44,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:44,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:45,307 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:45,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [286604619] [2020-09-14 12:55:45,307 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1597749022] [2020-09-14 12:55:45,316 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:45,383 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:55:45,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:45,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:45,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:45,416 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:45,416 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:45,416 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:45,416 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1691006494] [2020-09-14 12:55:45,417 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:45,417 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:45,417 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:45,417 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:45,417 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-09-14 12:55:46,952 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:46,952 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-09-14 12:55:46,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-14 12:55:46,954 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:46,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:46,954 INFO L225 Difference]: With dead ends: 127 [2020-09-14 12:55:46,954 INFO L226 Difference]: Without dead ends: 121 [2020-09-14 12:55:46,955 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-09-14 12:55:46,955 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-14 12:55:46,957 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-09-14 12:55:46,957 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-09-14 12:55:46,957 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-09-14 12:55:46,957 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-09-14 12:55:46,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:46,957 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-09-14 12:55:46,957 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:46,958 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-09-14 12:55:46,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:46,958 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:46,958 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:47,158 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:47,159 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:47,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:47,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-09-14 12:55:47,160 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:47,160 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [845462697] [2020-09-14 12:55:47,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:47,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:47,547 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:47,547 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [845462697] [2020-09-14 12:55:47,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1289933845] [2020-09-14 12:55:47,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:47,612 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:55:47,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:47,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:47,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:47,649 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:47,673 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:47,673 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:47,673 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:47,674 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076988001] [2020-09-14 12:55:47,674 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:47,674 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:47,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:47,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:47,675 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-09-14 12:55:49,581 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:49,581 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-09-14 12:55:49,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-14 12:55:49,583 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:49,583 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:49,583 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:55:49,583 INFO L226 Difference]: Without dead ends: 118 [2020-09-14 12:55:49,584 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-09-14 12:55:49,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-14 12:55:49,586 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-09-14 12:55:49,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-14 12:55:49,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-14 12:55:49,587 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-09-14 12:55:49,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:49,587 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-14 12:55:49,587 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:49,587 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-14 12:55:49,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:49,587 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:49,587 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:49,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-09-14 12:55:49,788 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:49,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:49,789 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-09-14 12:55:49,789 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:49,789 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377799690] [2020-09-14 12:55:49,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:49,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:50,180 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:50,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377799690] [2020-09-14 12:55:50,180 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972738483] [2020-09-14 12:55:50,181 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:50,261 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:55:50,262 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:50,263 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:50,264 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:50,294 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:50,295 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:50,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-14 12:55:50,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [983168402] [2020-09-14 12:55:50,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-14 12:55:50,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:50,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-14 12:55:50,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-09-14 12:55:50,296 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-09-14 12:55:51,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:51,914 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-09-14 12:55:51,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-14 12:55:51,915 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-14 12:55:51,916 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:51,916 INFO L225 Difference]: With dead ends: 144 [2020-09-14 12:55:51,916 INFO L226 Difference]: Without dead ends: 138 [2020-09-14 12:55:51,917 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-09-14 12:55:51,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-14 12:55:51,919 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-09-14 12:55:51,919 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-14 12:55:51,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-09-14 12:55:51,919 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-09-14 12:55:51,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:51,920 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-09-14 12:55:51,920 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-14 12:55:51,920 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-09-14 12:55:51,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-14 12:55:51,920 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:51,920 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:52,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:52,124 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:52,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:52,125 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-09-14 12:55:52,125 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:52,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1300126620] [2020-09-14 12:55:52,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:52,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:52,522 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:52,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1300126620] [2020-09-14 12:55:52,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [591052332] [2020-09-14 12:55:52,522 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:52,600 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:55:52,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:52,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-14 12:55:52,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:52,640 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:52,666 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:52,666 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:52,666 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-14 12:55:52,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1328217146] [2020-09-14 12:55:52,667 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:52,667 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:52,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:52,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:52,668 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-09-14 12:55:54,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:54,633 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-09-14 12:55:54,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-14 12:55:54,635 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-14 12:55:54,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:54,635 INFO L225 Difference]: With dead ends: 125 [2020-09-14 12:55:54,635 INFO L226 Difference]: Without dead ends: 117 [2020-09-14 12:55:54,636 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-09-14 12:55:54,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-14 12:55:54,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-09-14 12:55:54,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-09-14 12:55:54,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-09-14 12:55:54,638 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-09-14 12:55:54,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:54,639 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-09-14 12:55:54,639 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:54,639 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-09-14 12:55:54,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:55:54,639 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:54,639 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:54,839 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-09-14 12:55:54,840 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:54,840 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:54,840 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-09-14 12:55:54,841 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:54,841 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1167036590] [2020-09-14 12:55:54,841 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:54,852 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:55,391 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:55,391 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1167036590] [2020-09-14 12:55:55,392 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124196453] [2020-09-14 12:55:55,392 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:55,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:55,457 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:55:55,458 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:55,474 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:55,474 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:55,474 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:55:55,475 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1264331299] [2020-09-14 12:55:55,475 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:55,475 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:55,475 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:55,475 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:55,476 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand 24 states. [2020-09-14 12:55:56,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:56,365 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-09-14 12:55:56,366 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-14 12:55:56,366 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:55:56,366 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:56,367 INFO L225 Difference]: With dead ends: 144 [2020-09-14 12:55:56,367 INFO L226 Difference]: Without dead ends: 138 [2020-09-14 12:55:56,367 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-09-14 12:55:56,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-09-14 12:55:56,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-09-14 12:55:56,369 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:55:56,369 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:55:56,369 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:55:56,370 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:56,370 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:55:56,370 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:55:56,370 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:55:56,370 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:55:56,370 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:56,370 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:56,571 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:56,571 INFO L427 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:56,571 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:56,572 INFO L82 PathProgramCache]: Analyzing trace with hash 627867998, now seen corresponding path program 218 times [2020-09-14 12:55:56,572 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:56,572 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076441954] [2020-09-14 12:55:56,572 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:56,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:57,129 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:57,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076441954] [2020-09-14 12:55:57,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787706647] [2020-09-14 12:55:57,130 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:57,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:55:57,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:57,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:55:57,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:57,230 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:55:57,244 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:57,245 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:57,245 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:55:57,245 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852717247] [2020-09-14 12:55:57,245 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:55:57,246 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:57,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:55:57,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=131, Invalid=469, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:55:57,246 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:55:58,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:55:58,255 INFO L93 Difference]: Finished difference Result 141 states and 333 transitions. [2020-09-14 12:55:58,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-14 12:55:58,256 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:55:58,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:55:58,257 INFO L225 Difference]: With dead ends: 141 [2020-09-14 12:55:58,257 INFO L226 Difference]: Without dead ends: 135 [2020-09-14 12:55:58,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 421 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=653, Invalid=1603, Unknown=0, NotChecked=0, Total=2256 [2020-09-14 12:55:58,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-09-14 12:55:58,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 92. [2020-09-14 12:55:58,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:55:58,260 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:55:58,260 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:55:58,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:55:58,260 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:55:58,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:55:58,260 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:55:58,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:55:58,260 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:55:58,261 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:55:58,461 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable219 [2020-09-14 12:55:58,461 INFO L427 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:55:58,462 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:55:58,462 INFO L82 PathProgramCache]: Analyzing trace with hash -556056612, now seen corresponding path program 219 times [2020-09-14 12:55:58,462 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:55:58,462 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1010997370] [2020-09-14 12:55:58,463 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:55:58,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:55:58,994 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:58,994 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1010997370] [2020-09-14 12:55:58,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [488733003] [2020-09-14 12:55:58,995 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:55:59,063 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:55:59,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:55:59,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:55:59,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:55:59,082 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:55:59,083 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:55:59,083 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:55:59,083 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1848678331] [2020-09-14 12:55:59,083 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:55:59,083 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:55:59,083 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:55:59,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:55:59,084 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:00,044 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:00,045 INFO L93 Difference]: Finished difference Result 138 states and 327 transitions. [2020-09-14 12:56:00,046 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-14 12:56:00,046 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:00,046 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:00,046 INFO L225 Difference]: With dead ends: 138 [2020-09-14 12:56:00,046 INFO L226 Difference]: Without dead ends: 132 [2020-09-14 12:56:00,047 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 397 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=608, Invalid=1554, Unknown=0, NotChecked=0, Total=2162 [2020-09-14 12:56:00,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-09-14 12:56:00,049 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-09-14 12:56:00,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:56:00,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:56:00,049 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:56:00,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:00,050 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:56:00,050 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:00,050 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:56:00,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:00,050 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:00,050 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:00,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,217 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:00,251 INFO L427 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:00,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:00,252 INFO L82 PathProgramCache]: Analyzing trace with hash -2104215232, now seen corresponding path program 220 times [2020-09-14 12:56:00,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:00,252 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663100653] [2020-09-14 12:56:00,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:00,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:00,763 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:00,763 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663100653] [2020-09-14 12:56:00,764 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [459112203] [2020-09-14 12:56:00,764 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:00,828 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:56:00,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:00,829 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:00,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:00,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:56:00,883 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:00,884 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:00,884 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:00,884 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657201060] [2020-09-14 12:56:00,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:00,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:00,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:00,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=116, Invalid=484, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:00,885 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:56:02,049 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:02,049 INFO L93 Difference]: Finished difference Result 137 states and 325 transitions. [2020-09-14 12:56:02,050 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-14 12:56:02,051 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:02,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:02,051 INFO L225 Difference]: With dead ends: 137 [2020-09-14 12:56:02,051 INFO L226 Difference]: Without dead ends: 131 [2020-09-14 12:56:02,052 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 482 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=665, Invalid=1785, Unknown=0, NotChecked=0, Total=2450 [2020-09-14 12:56:02,052 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-09-14 12:56:02,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 92. [2020-09-14 12:56:02,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:56:02,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:56:02,054 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:56:02,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:02,055 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:56:02,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:02,055 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:56:02,055 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:02,055 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:02,055 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:02,255 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable221 [2020-09-14 12:56:02,256 INFO L427 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:02,256 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:02,256 INFO L82 PathProgramCache]: Analyzing trace with hash 888962878, now seen corresponding path program 221 times [2020-09-14 12:56:02,257 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:02,257 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [339276074] [2020-09-14 12:56:02,257 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:02,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:02,760 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:02,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [339276074] [2020-09-14 12:56:02,761 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1934818908] [2020-09-14 12:56:02,761 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:02,828 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:56:02,828 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:02,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:02,830 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:02,848 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:02,849 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:02,849 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:56:02,849 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893964654] [2020-09-14 12:56:02,849 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:56:02,849 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:02,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:56:02,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:56:02,850 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:03,930 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:03,930 INFO L93 Difference]: Finished difference Result 134 states and 319 transitions. [2020-09-14 12:56:03,931 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-14 12:56:03,931 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:03,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:03,932 INFO L225 Difference]: With dead ends: 134 [2020-09-14 12:56:03,932 INFO L226 Difference]: Without dead ends: 128 [2020-09-14 12:56:03,933 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 462 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=629, Invalid=1723, Unknown=0, NotChecked=0, Total=2352 [2020-09-14 12:56:03,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-14 12:56:03,934 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-09-14 12:56:03,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:56:03,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:56:03,935 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:56:03,935 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:03,935 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:56:03,935 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:03,936 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:56:03,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:03,936 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:03,936 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:04,144 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-09-14 12:56:04,144 INFO L427 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:04,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:04,145 INFO L82 PathProgramCache]: Analyzing trace with hash 78414242, now seen corresponding path program 222 times [2020-09-14 12:56:04,145 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:04,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1911368130] [2020-09-14 12:56:04,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:04,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:04,626 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:04,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1911368130] [2020-09-14 12:56:04,627 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [835417397] [2020-09-14 12:56:04,627 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:04,694 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:56:04,694 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:04,695 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:04,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:04,733 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:56:04,755 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:04,755 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:04,755 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:04,756 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1776870285] [2020-09-14 12:56:04,756 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:04,756 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:04,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:04,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=105, Invalid=495, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:04,756 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:56:06,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:06,069 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-09-14 12:56:06,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-14 12:56:06,070 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:06,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:06,071 INFO L225 Difference]: With dead ends: 133 [2020-09-14 12:56:06,071 INFO L226 Difference]: Without dead ends: 127 [2020-09-14 12:56:06,071 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 548 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=693, Invalid=1959, Unknown=0, NotChecked=0, Total=2652 [2020-09-14 12:56:06,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-09-14 12:56:06,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 92. [2020-09-14 12:56:06,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:56:06,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:56:06,074 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:56:06,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:06,074 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:56:06,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:06,074 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:56:06,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:06,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:06,075 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:06,275 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-09-14 12:56:06,275 INFO L427 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:06,276 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:06,276 INFO L82 PathProgramCache]: Analyzing trace with hash 130690848, now seen corresponding path program 223 times [2020-09-14 12:56:06,276 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:06,276 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [564152165] [2020-09-14 12:56:06,277 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:06,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:06,766 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:06,766 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [564152165] [2020-09-14 12:56:06,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993564984] [2020-09-14 12:56:06,767 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:06,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:06,832 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:06,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:06,851 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:06,852 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:06,852 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:56:06,852 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [226785505] [2020-09-14 12:56:06,852 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:56:06,852 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:06,853 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:56:06,853 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:56:06,853 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:08,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:08,038 INFO L93 Difference]: Finished difference Result 130 states and 311 transitions. [2020-09-14 12:56:08,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-14 12:56:08,040 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:08,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:08,040 INFO L225 Difference]: With dead ends: 130 [2020-09-14 12:56:08,040 INFO L226 Difference]: Without dead ends: 124 [2020-09-14 12:56:08,041 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=666, Invalid=1884, Unknown=0, NotChecked=0, Total=2550 [2020-09-14 12:56:08,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-09-14 12:56:08,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 93. [2020-09-14 12:56:08,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:56:08,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:56:08,044 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:56:08,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:08,044 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:56:08,045 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:08,045 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:56:08,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:08,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:08,045 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:08,250 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable224,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:08,250 INFO L427 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:08,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:08,251 INFO L82 PathProgramCache]: Analyzing trace with hash 2006940292, now seen corresponding path program 224 times [2020-09-14 12:56:08,251 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:08,251 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [849203881] [2020-09-14 12:56:08,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:08,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:08,728 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:08,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [849203881] [2020-09-14 12:56:08,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1081422706] [2020-09-14 12:56:08,729 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:08,792 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:56:08,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:08,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:08,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:08,827 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:56:08,846 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:08,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:08,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:08,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160298919] [2020-09-14 12:56:08,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:08,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:08,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:08,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=502, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:08,847 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:56:10,294 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:10,295 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-09-14 12:56:10,296 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-14 12:56:10,296 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:10,296 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:10,297 INFO L225 Difference]: With dead ends: 129 [2020-09-14 12:56:10,297 INFO L226 Difference]: Without dead ends: 123 [2020-09-14 12:56:10,297 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 618 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=737, Invalid=2125, Unknown=0, NotChecked=0, Total=2862 [2020-09-14 12:56:10,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-14 12:56:10,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 92. [2020-09-14 12:56:10,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:56:10,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:56:10,299 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:56:10,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:10,299 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:56:10,299 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:10,300 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:56:10,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:10,300 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:10,300 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:10,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-09-14 12:56:10,501 INFO L427 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:10,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:10,501 INFO L82 PathProgramCache]: Analyzing trace with hash -1599705214, now seen corresponding path program 225 times [2020-09-14 12:56:10,502 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:10,502 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [640350751] [2020-09-14 12:56:10,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:10,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:10,967 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:10,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [640350751] [2020-09-14 12:56:10,968 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [139175014] [2020-09-14 12:56:10,968 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:11,040 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:56:11,040 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:11,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:11,042 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:11,065 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:11,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:11,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:56:11,065 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [355856055] [2020-09-14 12:56:11,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:56:11,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:11,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:56:11,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:56:11,066 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:12,359 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:12,360 INFO L93 Difference]: Finished difference Result 126 states and 303 transitions. [2020-09-14 12:56:12,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-14 12:56:12,361 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:12,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:12,361 INFO L225 Difference]: With dead ends: 126 [2020-09-14 12:56:12,362 INFO L226 Difference]: Without dead ends: 120 [2020-09-14 12:56:12,362 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 604 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=719, Invalid=2037, Unknown=0, NotChecked=0, Total=2756 [2020-09-14 12:56:12,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-14 12:56:12,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 93. [2020-09-14 12:56:12,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:56:12,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:56:12,364 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:56:12,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:12,364 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:56:12,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:12,364 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:56:12,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:12,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:12,365 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:12,565 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable226,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:12,566 INFO L427 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:12,566 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:12,566 INFO L82 PathProgramCache]: Analyzing trace with hash -614513690, now seen corresponding path program 226 times [2020-09-14 12:56:12,567 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:12,567 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051236849] [2020-09-14 12:56:12,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:12,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:13,036 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:13,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051236849] [2020-09-14 12:56:13,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1348596139] [2020-09-14 12:56:13,037 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:13,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:56:13,101 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:13,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:13,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:13,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:56:13,162 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:13,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:13,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:13,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578861999] [2020-09-14 12:56:13,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:13,163 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:13,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:13,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=505, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:13,164 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:56:14,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:14,749 INFO L93 Difference]: Finished difference Result 125 states and 301 transitions. [2020-09-14 12:56:14,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-14 12:56:14,750 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:14,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:14,751 INFO L225 Difference]: With dead ends: 125 [2020-09-14 12:56:14,751 INFO L226 Difference]: Without dead ends: 119 [2020-09-14 12:56:14,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 692 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=797, Invalid=2283, Unknown=0, NotChecked=0, Total=3080 [2020-09-14 12:56:14,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-14 12:56:14,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 92. [2020-09-14 12:56:14,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:56:14,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:56:14,754 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:56:14,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:14,754 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:56:14,754 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:14,754 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:56:14,754 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:14,754 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:14,754 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:14,957 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 224 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable227 [2020-09-14 12:56:14,957 INFO L427 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:14,958 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:14,958 INFO L82 PathProgramCache]: Analyzing trace with hash 2063294564, now seen corresponding path program 227 times [2020-09-14 12:56:14,958 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:14,958 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513280192] [2020-09-14 12:56:14,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:14,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:15,414 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:15,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513280192] [2020-09-14 12:56:15,415 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [268763185] [2020-09-14 12:56:15,415 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:15,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:56:15,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:15,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:15,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:15,510 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:15,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:15,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:56:15,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1438068483] [2020-09-14 12:56:15,511 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:56:15,511 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:15,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:56:15,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=456, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:56:15,511 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:16,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:16,904 INFO L93 Difference]: Finished difference Result 122 states and 295 transitions. [2020-09-14 12:56:16,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-14 12:56:16,905 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:16,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:16,906 INFO L225 Difference]: With dead ends: 122 [2020-09-14 12:56:16,906 INFO L226 Difference]: Without dead ends: 116 [2020-09-14 12:56:16,909 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=788, Invalid=2182, Unknown=0, NotChecked=0, Total=2970 [2020-09-14 12:56:16,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-14 12:56:16,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 93. [2020-09-14 12:56:16,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:56:16,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:56:16,910 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:56:16,910 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:16,910 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:56:16,910 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:16,911 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:56:16,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:16,911 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:16,911 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:17,111 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable228,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:17,112 INFO L427 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:17,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:17,112 INFO L82 PathProgramCache]: Analyzing trace with hash -974783032, now seen corresponding path program 228 times [2020-09-14 12:56:17,113 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:17,113 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1628429671] [2020-09-14 12:56:17,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:17,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:17,559 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:17,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1628429671] [2020-09-14 12:56:17,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2080794198] [2020-09-14 12:56:17,559 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:17,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:56:17,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:17,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:17,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:17,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:56:17,688 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:17,688 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:17,689 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:17,689 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [937993878] [2020-09-14 12:56:17,689 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:17,689 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:17,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:17,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=96, Invalid=504, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:17,690 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:56:19,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:19,423 INFO L93 Difference]: Finished difference Result 121 states and 293 transitions. [2020-09-14 12:56:19,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-14 12:56:19,424 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:19,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:19,424 INFO L225 Difference]: With dead ends: 121 [2020-09-14 12:56:19,425 INFO L226 Difference]: Without dead ends: 115 [2020-09-14 12:56:19,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 770 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=873, Invalid=2433, Unknown=0, NotChecked=0, Total=3306 [2020-09-14 12:56:19,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-14 12:56:19,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 92. [2020-09-14 12:56:19,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:56:19,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:56:19,428 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:56:19,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:19,429 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:56:19,429 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:19,429 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:56:19,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:19,430 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:19,430 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:19,647 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable229 [2020-09-14 12:56:19,648 INFO L427 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:19,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:19,648 INFO L82 PathProgramCache]: Analyzing trace with hash 641409478, now seen corresponding path program 229 times [2020-09-14 12:56:19,649 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:19,649 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [444161568] [2020-09-14 12:56:19,649 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:19,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:20,091 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:20,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [444161568] [2020-09-14 12:56:20,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874701857] [2020-09-14 12:56:20,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:20,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:20,159 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:20,159 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:20,185 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:20,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:20,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:56:20,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917099786] [2020-09-14 12:56:20,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:56:20,185 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:20,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:56:20,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=452, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:56:20,186 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:21,659 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:21,660 INFO L93 Difference]: Finished difference Result 118 states and 287 transitions. [2020-09-14 12:56:21,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-14 12:56:21,661 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:21,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:21,662 INFO L225 Difference]: With dead ends: 118 [2020-09-14 12:56:21,662 INFO L226 Difference]: Without dead ends: 112 [2020-09-14 12:56:21,662 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 762 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=873, Invalid=2319, Unknown=0, NotChecked=0, Total=3192 [2020-09-14 12:56:21,663 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-14 12:56:21,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 93. [2020-09-14 12:56:21,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:56:21,665 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:56:21,665 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:56:21,665 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:21,665 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:56:21,665 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:21,665 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:56:21,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:21,665 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:21,665 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:21,866 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,227 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:21,866 INFO L427 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:21,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:21,867 INFO L82 PathProgramCache]: Analyzing trace with hash 1161152554, now seen corresponding path program 230 times [2020-09-14 12:56:21,867 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:21,867 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251762276] [2020-09-14 12:56:21,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:21,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:22,302 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:22,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251762276] [2020-09-14 12:56:22,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [859230035] [2020-09-14 12:56:22,303 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:22,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:56:22,379 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:22,380 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:22,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:22,415 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:56:22,436 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:22,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:22,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:22,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426378852] [2020-09-14 12:56:22,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:22,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:22,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:22,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=499, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:22,437 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:56:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:24,324 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-09-14 12:56:24,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-14 12:56:24,325 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:24,325 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:24,326 INFO L225 Difference]: With dead ends: 117 [2020-09-14 12:56:24,326 INFO L226 Difference]: Without dead ends: 111 [2020-09-14 12:56:24,326 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 852 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=965, Invalid=2575, Unknown=0, NotChecked=0, Total=3540 [2020-09-14 12:56:24,327 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-14 12:56:24,328 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 92. [2020-09-14 12:56:24,328 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:56:24,328 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:56:24,329 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:56:24,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:24,329 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:56:24,329 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:24,329 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:56:24,329 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:24,329 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:24,330 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:24,531 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,228 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:24,531 INFO L427 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:24,532 INFO L82 PathProgramCache]: Analyzing trace with hash -1478503512, now seen corresponding path program 231 times [2020-09-14 12:56:24,532 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:24,532 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1968413065] [2020-09-14 12:56:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:24,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:24,975 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:24,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1968413065] [2020-09-14 12:56:24,975 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [360847404] [2020-09-14 12:56:24,975 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:25,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:56:25,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:25,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:25,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:25,077 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:25,077 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:25,077 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:56:25,078 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731706912] [2020-09-14 12:56:25,078 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:56:25,078 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:25,078 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:56:25,078 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=444, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:56:25,078 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:26,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:26,660 INFO L93 Difference]: Finished difference Result 114 states and 279 transitions. [2020-09-14 12:56:26,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-14 12:56:26,662 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:26,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:26,662 INFO L225 Difference]: With dead ends: 114 [2020-09-14 12:56:26,663 INFO L226 Difference]: Without dead ends: 108 [2020-09-14 12:56:26,663 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 847 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=974, Invalid=2448, Unknown=0, NotChecked=0, Total=3422 [2020-09-14 12:56:26,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-14 12:56:26,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 93. [2020-09-14 12:56:26,673 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:56:26,673 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:56:26,673 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:56:26,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:26,674 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:56:26,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:26,674 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:56:26,674 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:26,674 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:26,674 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:26,874 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-09-14 12:56:26,875 INFO L427 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:26,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:26,875 INFO L82 PathProgramCache]: Analyzing trace with hash 1096336140, now seen corresponding path program 232 times [2020-09-14 12:56:26,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:26,876 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [334924077] [2020-09-14 12:56:26,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:26,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:27,310 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:27,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [334924077] [2020-09-14 12:56:27,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445211895] [2020-09-14 12:56:27,311 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:27,376 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:56:27,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:27,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:27,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:27,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:56:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:27,442 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:27,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:27,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1741139805] [2020-09-14 12:56:27,443 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:27,443 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:27,443 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:27,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=490, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:27,444 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:56:29,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:29,483 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-14 12:56:29,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-14 12:56:29,485 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:29,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:29,485 INFO L225 Difference]: With dead ends: 113 [2020-09-14 12:56:29,485 INFO L226 Difference]: Without dead ends: 107 [2020-09-14 12:56:29,486 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 938 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1073, Invalid=2709, Unknown=0, NotChecked=0, Total=3782 [2020-09-14 12:56:29,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-14 12:56:29,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 92. [2020-09-14 12:56:29,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:56:29,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:56:29,488 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:56:29,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:29,488 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:56:29,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:29,489 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:56:29,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:29,489 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:29,489 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:29,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-09-14 12:56:29,690 INFO L427 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:29,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:29,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1567331850, now seen corresponding path program 233 times [2020-09-14 12:56:29,691 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:29,691 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1758869631] [2020-09-14 12:56:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:29,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:30,117 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:30,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1758869631] [2020-09-14 12:56:30,117 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099264601] [2020-09-14 12:56:30,117 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:30,186 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-14 12:56:30,187 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:30,188 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:30,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:30,221 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:30,221 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:30,222 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:56:30,222 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1615274005] [2020-09-14 12:56:30,222 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:56:30,222 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:30,222 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:56:30,222 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=120, Invalid=432, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:56:30,222 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:31,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:31,923 INFO L93 Difference]: Finished difference Result 110 states and 271 transitions. [2020-09-14 12:56:31,924 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-09-14 12:56:31,924 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:31,924 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:31,924 INFO L225 Difference]: With dead ends: 110 [2020-09-14 12:56:31,925 INFO L226 Difference]: Without dead ends: 104 [2020-09-14 12:56:31,925 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 936 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1091, Invalid=2569, Unknown=0, NotChecked=0, Total=3660 [2020-09-14 12:56:31,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-14 12:56:31,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 93. [2020-09-14 12:56:31,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-09-14 12:56:31,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-09-14 12:56:31,927 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-09-14 12:56:31,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:31,927 INFO L479 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-09-14 12:56:31,927 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:31,928 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-09-14 12:56:31,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:31,928 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:31,928 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:32,128 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-09-14 12:56:32,129 INFO L427 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:32,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:32,129 INFO L82 PathProgramCache]: Analyzing trace with hash 1583418990, now seen corresponding path program 234 times [2020-09-14 12:56:32,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:32,130 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [487568285] [2020-09-14 12:56:32,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:32,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:32,555 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:32,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [487568285] [2020-09-14 12:56:32,556 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474286794] [2020-09-14 12:56:32,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:32,627 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-14 12:56:32,627 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:32,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:32,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:32,667 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-14 12:56:32,694 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:32,695 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:32,695 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:32,695 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008818274] [2020-09-14 12:56:32,695 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:32,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:32,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:32,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=123, Invalid=477, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:32,696 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand 25 states. [2020-09-14 12:56:34,907 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:34,907 INFO L93 Difference]: Finished difference Result 109 states and 269 transitions. [2020-09-14 12:56:34,908 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-14 12:56:34,909 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:34,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:34,909 INFO L225 Difference]: With dead ends: 109 [2020-09-14 12:56:34,909 INFO L226 Difference]: Without dead ends: 103 [2020-09-14 12:56:34,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1028 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1197, Invalid=2835, Unknown=0, NotChecked=0, Total=4032 [2020-09-14 12:56:34,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-14 12:56:34,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 92. [2020-09-14 12:56:34,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-09-14 12:56:34,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 235 transitions. [2020-09-14 12:56:34,912 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 235 transitions. Word has length 28 [2020-09-14 12:56:34,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:34,913 INFO L479 AbstractCegarLoop]: Abstraction has 92 states and 235 transitions. [2020-09-14 12:56:34,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:34,913 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 235 transitions. [2020-09-14 12:56:34,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:34,913 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:34,913 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:35,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-09-14 12:56:35,114 INFO L427 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:35,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:35,115 INFO L82 PathProgramCache]: Analyzing trace with hash 1583909100, now seen corresponding path program 235 times [2020-09-14 12:56:35,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:35,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907071819] [2020-09-14 12:56:35,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:35,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:35,551 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:35,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907071819] [2020-09-14 12:56:35,552 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [838514047] [2020-09-14 12:56:35,552 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:35,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:35,624 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:35,625 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:35,660 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:35,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:35,660 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-09-14 12:56:35,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1266849664] [2020-09-14 12:56:35,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-14 12:56:35,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:35,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-14 12:56:35,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-09-14 12:56:35,662 INFO L87 Difference]: Start difference. First operand 92 states and 235 transitions. Second operand 24 states. [2020-09-14 12:56:37,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:37,477 INFO L93 Difference]: Finished difference Result 125 states and 309 transitions. [2020-09-14 12:56:37,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-14 12:56:37,479 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 28 [2020-09-14 12:56:37,479 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:37,479 INFO L225 Difference]: With dead ends: 125 [2020-09-14 12:56:37,479 INFO L226 Difference]: Without dead ends: 119 [2020-09-14 12:56:37,480 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1029 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=1224, Invalid=2682, Unknown=0, NotChecked=0, Total=3906 [2020-09-14 12:56:37,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-14 12:56:37,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 96. [2020-09-14 12:56:37,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-09-14 12:56:37,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 249 transitions. [2020-09-14 12:56:37,482 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 249 transitions. Word has length 28 [2020-09-14 12:56:37,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:37,483 INFO L479 AbstractCegarLoop]: Abstraction has 96 states and 249 transitions. [2020-09-14 12:56:37,483 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-14 12:56:37,483 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 249 transitions. [2020-09-14 12:56:37,483 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:37,483 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:37,483 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:37,684 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-09-14 12:56:37,684 INFO L427 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:37,684 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:37,685 INFO L82 PathProgramCache]: Analyzing trace with hash 1583925840, now seen corresponding path program 236 times [2020-09-14 12:56:37,685 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:37,685 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [647010245] [2020-09-14 12:56:37,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:37,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:38,127 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:38,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [647010245] [2020-09-14 12:56:38,128 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131522867] [2020-09-14 12:56:38,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:38,193 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-14 12:56:38,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:38,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 25 conjunts are in the unsatisfiable core [2020-09-14 12:56:38,195 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:38,265 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:38,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:38,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:38,265 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1224191230] [2020-09-14 12:56:38,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:38,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:38,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:38,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:38,266 INFO L87 Difference]: Start difference. First operand 96 states and 249 transitions. Second operand 25 states. [2020-09-14 12:56:40,310 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:40,311 INFO L93 Difference]: Finished difference Result 104 states and 261 transitions. [2020-09-14 12:56:40,311 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-09-14 12:56:40,312 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:40,312 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:40,312 INFO L225 Difference]: With dead ends: 104 [2020-09-14 12:56:40,312 INFO L226 Difference]: Without dead ends: 96 [2020-09-14 12:56:40,312 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 88 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 62 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1004 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=1121, Invalid=2911, Unknown=0, NotChecked=0, Total=4032 [2020-09-14 12:56:40,313 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-14 12:56:40,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 69. [2020-09-14 12:56:40,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-14 12:56:40,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-09-14 12:56:40,314 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-09-14 12:56:40,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:40,314 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-09-14 12:56:40,314 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:40,315 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-09-14 12:56:40,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-09-14 12:56:40,315 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:40,315 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:40,520 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable237,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:40,520 INFO L427 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:40,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:40,521 INFO L82 PathProgramCache]: Analyzing trace with hash 234390510, now seen corresponding path program 237 times [2020-09-14 12:56:40,521 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:40,521 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003322279] [2020-09-14 12:56:40,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:40,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:40,957 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:40,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003322279] [2020-09-14 12:56:40,957 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [650519178] [2020-09-14 12:56:40,957 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:41,034 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-14 12:56:41,035 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:41,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 164 conjuncts, 24 conjunts are in the unsatisfiable core [2020-09-14 12:56:41,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:41,073 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-14 12:56:41,104 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:41,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-14 12:56:41,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-09-14 12:56:41,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017162294] [2020-09-14 12:56:41,105 INFO L459 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-09-14 12:56:41,105 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:41,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-09-14 12:56:41,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-09-14 12:56:41,106 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand 25 states. [2020-09-14 12:56:43,214 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:43,214 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-09-14 12:56:43,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-09-14 12:56:43,216 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 28 [2020-09-14 12:56:43,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:43,217 INFO L225 Difference]: With dead ends: 124 [2020-09-14 12:56:43,217 INFO L226 Difference]: Without dead ends: 119 [2020-09-14 12:56:43,217 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-09-14 12:56:43,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-14 12:56:43,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-09-14 12:56:43,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-09-14 12:56:43,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-09-14 12:56:43,219 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-09-14 12:56:43,220 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:43,220 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-09-14 12:56:43,220 INFO L480 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-09-14 12:56:43,220 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-09-14 12:56:43,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-14 12:56:43,220 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:43,220 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:43,421 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 235 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-09-14 12:56:43,421 INFO L427 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:43,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:43,422 INFO L82 PathProgramCache]: Analyzing trace with hash 1857077091, now seen corresponding path program 238 times [2020-09-14 12:56:43,422 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:43,422 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [352047429] [2020-09-14 12:56:43,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:43,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:43,675 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:43,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [352047429] [2020-09-14 12:56:43,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1028487878] [2020-09-14 12:56:43,676 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:43,739 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-14 12:56:43,739 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:43,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 166 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:56:43,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:43,782 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:43,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-14 12:56:43,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-09-14 12:56:43,783 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410378238] [2020-09-14 12:56:43,783 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:56:43,783 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:43,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:56:43,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:56:43,784 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand 13 states. [2020-09-14 12:56:43,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:43,824 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-09-14 12:56:43,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:56:43,825 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-09-14 12:56:43,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:43,826 INFO L225 Difference]: With dead ends: 421 [2020-09-14 12:56:43,826 INFO L226 Difference]: Without dead ends: 70 [2020-09-14 12:56:43,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-09-14 12:56:43,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-14 12:56:43,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-09-14 12:56:43,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-14 12:56:43,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-09-14 12:56:43,828 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-09-14 12:56:43,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:43,828 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-09-14 12:56:43,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:56:43,828 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-09-14 12:56:43,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-09-14 12:56:43,829 INFO L414 BasicCegarLoop]: Found error trace [2020-09-14 12:56:43,829 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-14 12:56:44,035 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable239,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:44,035 INFO L427 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-14 12:56:44,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-14 12:56:44,035 INFO L82 PathProgramCache]: Analyzing trace with hash 65865102, now seen corresponding path program 239 times [2020-09-14 12:56:44,036 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-14 12:56:44,036 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1436074419] [2020-09-14 12:56:44,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-14 12:56:44,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-14 12:56:44,659 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:44,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1436074419] [2020-09-14 12:56:44,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2106196853] [2020-09-14 12:56:44,660 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:44,729 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-09-14 12:56:44,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-14 12:56:44,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 169 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-14 12:56:44,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-14 12:56:45,229 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-14 12:56:45,230 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-09-14 12:56:45,230 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-09-14 12:56:45,230 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354166581] [2020-09-14 12:56:45,231 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-14 12:56:45,231 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-14 12:56:45,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-14 12:56:45,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:56:45,231 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand 13 states. [2020-09-14 12:56:45,295 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-14 12:56:45,295 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-09-14 12:56:45,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-14 12:56:45,297 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-09-14 12:56:45,297 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-14 12:56:45,297 INFO L225 Difference]: With dead ends: 256 [2020-09-14 12:56:45,298 INFO L226 Difference]: Without dead ends: 0 [2020-09-14 12:56:45,298 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-09-14 12:56:45,298 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-09-14 12:56:45,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-09-14 12:56:45,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-09-14 12:56:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-09-14 12:56:45,299 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-09-14 12:56:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-14 12:56:45,300 INFO L479 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-09-14 12:56:45,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-14 12:56:45,300 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-09-14 12:56:45,300 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-09-14 12:56:45,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,237 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-14 12:56:45,512 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 14.09 12:56:45 BasicIcfg [2020-09-14 12:56:45,512 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-14 12:56:45,518 INFO L168 Benchmark]: Toolchain (without parser) took 332909.48 ms. Allocated memory was 141.0 MB in the beginning and 199.8 MB in the end (delta: 58.7 MB). Free memory was 102.8 MB in the beginning and 101.9 MB in the end (delta: 832.8 kB). Peak memory consumption was 59.6 MB. Max. memory is 7.1 GB. [2020-09-14 12:56:45,519 INFO L168 Benchmark]: CDTParser took 0.58 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-14 12:56:45,519 INFO L168 Benchmark]: CACSL2BoogieTranslator took 818.81 ms. Allocated memory was 141.0 MB in the beginning and 207.1 MB in the end (delta: 66.1 MB). Free memory was 102.1 MB in the beginning and 167.4 MB in the end (delta: -65.3 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. [2020-09-14 12:56:45,521 INFO L168 Benchmark]: Boogie Procedure Inliner took 65.31 ms. Allocated memory is still 207.1 MB. Free memory was 167.4 MB in the beginning and 164.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. [2020-09-14 12:56:45,521 INFO L168 Benchmark]: Boogie Preprocessor took 35.58 ms. Allocated memory is still 207.1 MB. Free memory was 164.9 MB in the beginning and 163.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-14 12:56:45,522 INFO L168 Benchmark]: RCFGBuilder took 425.70 ms. Allocated memory is still 207.1 MB. Free memory was 163.6 MB in the beginning and 143.5 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. [2020-09-14 12:56:45,522 INFO L168 Benchmark]: TraceAbstraction took 331551.26 ms. Allocated memory was 207.1 MB in the beginning and 199.8 MB in the end (delta: -7.3 MB). Free memory was 142.8 MB in the beginning and 101.9 MB in the end (delta: 40.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. [2020-09-14 12:56:45,527 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.58 ms. Allocated memory is still 141.0 MB. Free memory was 122.6 MB in the beginning and 122.4 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 818.81 ms. Allocated memory was 141.0 MB in the beginning and 207.1 MB in the end (delta: 66.1 MB). Free memory was 102.1 MB in the beginning and 167.4 MB in the end (delta: -65.3 MB). Peak memory consumption was 26.0 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 65.31 ms. Allocated memory is still 207.1 MB. Free memory was 167.4 MB in the beginning and 164.9 MB in the end (delta: 2.6 MB). Peak memory consumption was 2.6 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 35.58 ms. Allocated memory is still 207.1 MB. Free memory was 164.9 MB in the beginning and 163.6 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 425.70 ms. Allocated memory is still 207.1 MB. Free memory was 163.6 MB in the beginning and 143.5 MB in the end (delta: 20.1 MB). Peak memory consumption was 20.1 MB. Max. memory is 7.1 GB. * TraceAbstraction took 331551.26 ms. Allocated memory was 207.1 MB in the beginning and 199.8 MB in the end (delta: -7.3 MB). Free memory was 142.8 MB in the beginning and 101.9 MB in the end (delta: 40.9 MB). Peak memory consumption was 33.5 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.6s, 57 ProgramPointsBefore, 20 ProgramPointsAfterwards, 55 TransitionsBefore, 15 TransitionsAfterwards, 924 CoEnabledTransitionPairs, 6 FixpointIterations, 12 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 5 ConcurrentYvCompositions, 3 ChoiceCompositions, 486 VarBasedMoverChecksPositive, 13 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 16 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - PositiveResult [Line: 703]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 331.3s, OverallIterations: 241, TraceHistogramMax: 11, AutomataDifference: 192.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.6s, HoareTripleCheckerStatistics: 3935 SDtfs, 13973 SDslu, 25157 SDs, 0 SdLazy, 27289 SolverSat, 16264 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 35.1s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 13658 GetRequests, 4494 SyntacticMatches, 234 SemanticMatches, 8930 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91491 ImplicationChecksByTransitivity, 199.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=96occurred in iteration=237, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 241 MinimizatonAttempts, 6070 StatesRemovedByMinimization, 238 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 2.3s SsaConstructionTime, 7.2s SatisfiabilityAnalysisTime, 68.8s InterpolantComputationTime, 10246 NumberOfCodeBlocks, 10244 NumberOfCodeBlocksAsserted, 1270 NumberOfCheckSat, 9769 ConstructedInterpolants, 0 QuantifiedInterpolants, 956995 SizeOfPredicates, 3171 NumberOfNonLiveVariables, 31166 ConjunctsInSsa, 4133 ConjunctsInUnsatCore, 477 InterpolantComputations, 7 PerfectInterpolantSequences, 272/21430 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...