/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-507b705 [2020-09-11 12:06:36,017 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-09-11 12:06:36,022 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-09-11 12:06:36,068 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-09-11 12:06:36,068 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-09-11 12:06:36,081 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-09-11 12:06:36,082 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-09-11 12:06:36,087 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-09-11 12:06:36,090 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-09-11 12:06:36,092 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-09-11 12:06:36,093 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-09-11 12:06:36,096 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-09-11 12:06:36,096 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-09-11 12:06:36,102 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-09-11 12:06:36,105 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-09-11 12:06:36,107 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-09-11 12:06:36,109 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-09-11 12:06:36,112 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-09-11 12:06:36,114 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-09-11 12:06:36,124 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-09-11 12:06:36,125 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-09-11 12:06:36,128 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-09-11 12:06:36,129 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-09-11 12:06:36,130 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-09-11 12:06:36,134 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-09-11 12:06:36,135 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-09-11 12:06:36,135 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-09-11 12:06:36,139 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-09-11 12:06:36,139 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-09-11 12:06:36,142 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-09-11 12:06:36,142 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-09-11 12:06:36,143 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-09-11 12:06:36,144 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-09-11 12:06:36,145 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-09-11 12:06:36,147 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-09-11 12:06:36,147 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-09-11 12:06:36,148 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-09-11 12:06:36,149 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-09-11 12:06:36,149 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-09-11 12:06:36,150 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-09-11 12:06:36,152 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-09-11 12:06:36,153 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 [2020-09-11 12:06:36,205 INFO L113 SettingsManager]: Loading preferences was successful [2020-09-11 12:06:36,205 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-09-11 12:06:36,208 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-09-11 12:06:36,208 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-09-11 12:06:36,208 INFO L138 SettingsManager]: * Use SBE=true [2020-09-11 12:06:36,209 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-09-11 12:06:36,209 INFO L138 SettingsManager]: * sizeof long=4 [2020-09-11 12:06:36,209 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-09-11 12:06:36,210 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-09-11 12:06:36,210 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-09-11 12:06:36,211 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-09-11 12:06:36,211 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-09-11 12:06:36,212 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-09-11 12:06:36,212 INFO L138 SettingsManager]: * sizeof long double=12 [2020-09-11 12:06:36,212 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-09-11 12:06:36,212 INFO L138 SettingsManager]: * Use constant arrays=true [2020-09-11 12:06:36,213 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-09-11 12:06:36,213 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-09-11 12:06:36,213 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-09-11 12:06:36,213 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-09-11 12:06:36,214 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-09-11 12:06:36,214 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-09-11 12:06:36,214 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-09-11 12:06:36,214 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-09-11 12:06:36,214 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-09-11 12:06:36,215 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-09-11 12:06:36,215 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-09-11 12:06:36,215 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-09-11 12:06:36,215 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-09-11 12:06:36,216 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-09-11 12:06:36,654 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-09-11 12:06:36,680 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-09-11 12:06:36,684 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-09-11 12:06:36,686 INFO L271 PluginConnector]: Initializing CDTParser... [2020-09-11 12:06:36,686 INFO L275 PluginConnector]: CDTParser initialized [2020-09-11 12:06:36,687 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-09-11 12:06:36,754 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/620c51727/93ca7ec396684caea2f7c4595712eb1f/FLAG0fe86b78f [2020-09-11 12:06:37,375 INFO L306 CDTParser]: Found 1 translation units. [2020-09-11 12:06:37,376 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-09-11 12:06:37,392 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/620c51727/93ca7ec396684caea2f7c4595712eb1f/FLAG0fe86b78f [2020-09-11 12:06:37,633 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/620c51727/93ca7ec396684caea2f7c4595712eb1f [2020-09-11 12:06:37,646 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-09-11 12:06:37,654 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-09-11 12:06:37,655 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-09-11 12:06:37,655 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-09-11 12:06:37,659 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-09-11 12:06:37,661 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,666 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@56193757 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:37, skipping insertion in model container [2020-09-11 12:06:37,666 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.09 12:06:37" (1/1) ... [2020-09-11 12:06:37,675 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-09-11 12:06:37,753 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-09-11 12:06:38,248 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:06:38,270 INFO L203 MainTranslator]: Completed pre-run [2020-09-11 12:06:38,359 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-09-11 12:06:38,431 INFO L208 MainTranslator]: Completed translation [2020-09-11 12:06:38,432 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38 WrapperNode [2020-09-11 12:06:38,432 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-09-11 12:06:38,433 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-09-11 12:06:38,433 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-09-11 12:06:38,433 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-09-11 12:06:38,446 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,466 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,503 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-09-11 12:06:38,503 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-09-11 12:06:38,503 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-09-11 12:06:38,503 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-09-11 12:06:38,516 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,516 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,519 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,519 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,526 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,533 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,535 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (1/1) ... [2020-09-11 12:06:38,539 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-09-11 12:06:38,540 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-09-11 12:06:38,540 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-09-11 12:06:38,540 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-09-11 12:06:38,541 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (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 [2020-09-11 12:06:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-09-11 12:06:38,625 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-09-11 12:06:38,625 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-09-11 12:06:38,625 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-09-11 12:06:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-09-11 12:06:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-09-11 12:06:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-09-11 12:06:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-09-11 12:06:38,626 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-09-11 12:06:38,627 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-09-11 12:06:38,627 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-09-11 12:06:38,629 WARN L205 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-09-11 12:06:39,006 INFO L290 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-09-11 12:06:39,007 INFO L295 CfgBuilder]: Removed 6 assume(true) statements. [2020-09-11 12:06:39,012 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:06:39 BoogieIcfgContainer [2020-09-11 12:06:39,012 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-09-11 12:06:39,014 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-09-11 12:06:39,014 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-09-11 12:06:39,018 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-09-11 12:06:39,018 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.09 12:06:37" (1/3) ... [2020-09-11 12:06:39,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae7fcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:06:39, skipping insertion in model container [2020-09-11 12:06:39,020 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.09 12:06:38" (2/3) ... [2020-09-11 12:06:39,020 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@1ae7fcdb and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.09 12:06:39, skipping insertion in model container [2020-09-11 12:06:39,021 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.09 12:06:39" (3/3) ... [2020-09-11 12:06:39,023 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-09-11 12:06:39,033 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-09-11 12:06:39,033 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-09-11 12:06:39,043 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-09-11 12:06:39,044 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-09-11 12:06:39,071 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,072 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,072 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,072 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,073 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,074 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,074 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,074 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,075 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,075 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,075 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,075 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,076 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,076 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,076 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,077 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,077 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,077 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,078 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,078 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,078 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,079 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,079 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,079 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,080 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,085 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,085 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,085 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,086 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,086 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,096 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,096 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,097 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,097 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,097 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,097 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-09-11 12:06:39,122 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-09-11 12:06:39,148 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-09-11 12:06:39,148 INFO L376 AbstractCegarLoop]: Hoare is true [2020-09-11 12:06:39,148 INFO L377 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-09-11 12:06:39,148 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-09-11 12:06:39,149 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-09-11 12:06:39,149 INFO L380 AbstractCegarLoop]: Difference is false [2020-09-11 12:06:39,149 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-09-11 12:06:39,149 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-09-11 12:06:39,166 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:39,168 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:39,210 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 12:06:39,211 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:06:39,218 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. [2020-09-11 12:06:39,221 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-09-11 12:06:39,249 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-09-11 12:06:39,249 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-09-11 12:06:39,250 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. [2020-09-11 12:06:39,253 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-09-11 12:06:39,254 INFO L170 etLargeBlockEncoding]: Semantic Check. [2020-09-11 12:06:40,414 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-09-11 12:06:40,666 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-09-11 12:06:40,666 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-09-11 12:06:40,671 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-09-11 12:06:40,692 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-09-11 12:06:40,695 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-09-11 12:06:40,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-09-11 12:06:40,703 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:40,705 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-09-11 12:06:40,705 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:40,712 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:40,712 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-09-11 12:06:40,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:40,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [267630320] [2020-09-11 12:06:40,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,000 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [267630320] [2020-09-11 12:06:41,003 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:41,003 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-09-11 12:06:41,004 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586968306] [2020-09-11 12:06:41,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-09-11 12:06:41,012 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,031 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-09-11 12:06:41,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-09-11 12:06:41,035 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-09-11 12:06:41,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,123 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-09-11 12:06:41,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-09-11 12:06:41,125 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-09-11 12:06:41,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,141 INFO L225 Difference]: With dead ends: 75 [2020-09-11 12:06:41,141 INFO L226 Difference]: Without dead ends: 42 [2020-09-11 12:06:41,143 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 [2020-09-11 12:06:41,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-09-11 12:06:41,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-09-11 12:06:41,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:41,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-09-11 12:06:41,186 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-09-11 12:06:41,186 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,186 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-09-11 12:06:41,186 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-09-11 12:06:41,186 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-09-11 12:06:41,187 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-09-11 12:06:41,187 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,187 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-09-11 12:06:41,188 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,188 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,188 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-09-11 12:06:41,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,189 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277135697] [2020-09-11 12:06:41,189 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,297 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277135697] [2020-09-11 12:06:41,298 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:41,298 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-09-11 12:06:41,299 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96176055] [2020-09-11 12:06:41,300 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-09-11 12:06:41,301 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-09-11 12:06:41,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-09-11 12:06:41,302 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-09-11 12:06:41,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,351 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-09-11 12:06:41,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-09-11 12:06:41,352 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-09-11 12:06:41,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,353 INFO L225 Difference]: With dead ends: 56 [2020-09-11 12:06:41,354 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:06:41,354 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 [2020-09-11 12:06:41,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:06:41,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-09-11 12:06:41,361 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:41,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-09-11 12:06:41,363 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-09-11 12:06:41,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,364 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-09-11 12:06:41,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-09-11 12:06:41,364 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-09-11 12:06:41,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:41,365 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,365 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,366 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-09-11 12:06:41,366 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,366 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-09-11 12:06:41,367 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,367 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [284186404] [2020-09-11 12:06:41,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,452 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,453 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [284186404] [2020-09-11 12:06:41,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:41,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:41,453 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [241433307] [2020-09-11 12:06:41,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:41,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:41,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:41,455 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-09-11 12:06:41,542 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,542 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-09-11 12:06:41,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:41,543 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:41,543 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,545 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:41,545 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:41,545 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 [2020-09-11 12:06:41,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:41,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-09-11 12:06:41,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:41,555 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:41,555 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-09-11 12:06:41,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,555 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:41,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:41,556 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:41,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:41,557 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,557 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,557 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-09-11 12:06:41,557 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,557 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,558 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-09-11 12:06:41,558 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,558 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217116464] [2020-09-11 12:06:41,558 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,645 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217116464] [2020-09-11 12:06:41,645 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:41,645 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:41,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147446293] [2020-09-11 12:06:41,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:41,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,646 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:41,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:41,647 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-09-11 12:06:41,744 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,744 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 12:06:41,745 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:06:41,745 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:41,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,746 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:41,746 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 12:06:41,747 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 [2020-09-11 12:06:41,747 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 12:06:41,751 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 12:06:41,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 12:06:41,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-09-11 12:06:41,752 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-09-11 12:06:41,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,752 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-09-11 12:06:41,752 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:41,753 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-09-11 12:06:41,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-09-11 12:06:41,753 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,754 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-09-11 12:06:41,754 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,754 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,754 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-09-11 12:06:41,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,755 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23920710] [2020-09-11 12:06:41,755 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,772 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:41,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:41,827 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23920710] [2020-09-11 12:06:41,827 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-09-11 12:06:41,828 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-09-11 12:06:41,828 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1773377926] [2020-09-11 12:06:41,828 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-09-11 12:06:41,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:41,829 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-09-11 12:06:41,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-09-11 12:06:41,830 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-09-11 12:06:41,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:41,914 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-09-11 12:06:41,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-09-11 12:06:41,915 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-09-11 12:06:41,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:41,916 INFO L225 Difference]: With dead ends: 57 [2020-09-11 12:06:41,916 INFO L226 Difference]: Without dead ends: 51 [2020-09-11 12:06:41,917 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 [2020-09-11 12:06:41,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-09-11 12:06:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-09-11 12:06:41,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 12:06:41,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 12:06:41,922 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-09-11 12:06:41,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:41,923 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 12:06:41,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-09-11 12:06:41,923 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 12:06:41,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:41,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:41,924 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:41,924 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-09-11 12:06:41,925 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:41,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:41,925 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-09-11 12:06:41,925 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:41,926 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [351481729] [2020-09-11 12:06:41,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:41,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,029 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [351481729] [2020-09-11 12:06:42,030 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1693564437] [2020-09-11 12:06:42,030 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 [2020-09-11 12:06:42,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:42,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:42,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:42,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:42,148 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:42,162 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:42,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:42,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413535550] [2020-09-11 12:06:42,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:42,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:42,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:42,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:42,165 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-09-11 12:06:42,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:42,308 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-09-11 12:06:42,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:42,308 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:42,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:42,309 INFO L225 Difference]: With dead ends: 48 [2020-09-11 12:06:42,310 INFO L226 Difference]: Without dead ends: 43 [2020-09-11 12:06:42,310 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 [2020-09-11 12:06:42,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-09-11 12:06:42,315 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-09-11 12:06:42,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-09-11 12:06:42,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-09-11 12:06:42,316 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-09-11 12:06:42,316 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:42,316 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-09-11 12:06:42,316 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:42,316 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-09-11 12:06:42,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:42,317 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:42,317 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:42,522 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-09-11 12:06:42,522 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:42,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:42,523 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-09-11 12:06:42,524 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:42,524 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393615919] [2020-09-11 12:06:42,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:42,540 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:42,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,602 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393615919] [2020-09-11 12:06:42,603 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997469634] [2020-09-11 12:06:42,603 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 [2020-09-11 12:06:42,663 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:42,664 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:42,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:42,668 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:42,693 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:42,694 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:42,694 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 12:06:42,694 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [480685595] [2020-09-11 12:06:42,696 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 12:06:42,696 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:42,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 12:06:42,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:06:42,697 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-09-11 12:06:42,793 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:42,793 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-09-11 12:06:42,794 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-09-11 12:06:42,794 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 12:06:42,794 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:42,795 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:42,795 INFO L226 Difference]: Without dead ends: 48 [2020-09-11 12:06:42,795 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 [2020-09-11 12:06:42,796 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-09-11 12:06:42,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-09-11 12:06:42,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:42,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-09-11 12:06:42,800 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-09-11 12:06:42,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:42,801 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-09-11 12:06:42,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 12:06:42,801 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-09-11 12:06:42,802 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:42,802 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:42,802 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:43,013 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:43,014 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:43,014 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:43,015 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-09-11 12:06:43,015 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:43,016 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1285556194] [2020-09-11 12:06:43,016 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:43,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:43,102 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1285556194] [2020-09-11 12:06:43,102 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1554770913] [2020-09-11 12:06:43,103 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 [2020-09-11 12:06:43,153 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:06:43,153 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:43,154 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:43,155 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:43,180 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,197 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:43,198 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:43,198 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1586032881] [2020-09-11 12:06:43,198 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:43,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:43,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:43,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:43,199 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-09-11 12:06:43,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:43,331 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-09-11 12:06:43,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-09-11 12:06:43,332 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:43,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:43,332 INFO L225 Difference]: With dead ends: 58 [2020-09-11 12:06:43,333 INFO L226 Difference]: Without dead ends: 52 [2020-09-11 12:06:43,333 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 [2020-09-11 12:06:43,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-09-11 12:06:43,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-09-11 12:06:43,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-09-11 12:06:43,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-09-11 12:06:43,338 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-09-11 12:06:43,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:43,338 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-09-11 12:06:43,339 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:43,339 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-09-11 12:06:43,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:43,339 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:43,340 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:43,540 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:43,541 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:43,541 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:43,542 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-09-11 12:06:43,542 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:43,542 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [835705983] [2020-09-11 12:06:43,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:43,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:43,610 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [835705983] [2020-09-11 12:06:43,611 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609995460] [2020-09-11 12:06:43,611 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 [2020-09-11 12:06:43,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:43,662 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:43,663 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:43,683 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:43,683 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:43,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-09-11 12:06:43,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1207200907] [2020-09-11 12:06:43,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-09-11 12:06:43,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:43,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-09-11 12:06:43,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-09-11 12:06:43,685 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-09-11 12:06:43,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:43,838 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 12:06:43,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:43,839 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-09-11 12:06:43,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:43,840 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:06:43,841 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:06:43,841 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 [2020-09-11 12:06:43,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:06:43,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-09-11 12:06:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-09-11 12:06:43,850 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-09-11 12:06:43,850 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:43,850 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-09-11 12:06:43,850 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-09-11 12:06:43,850 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-09-11 12:06:43,851 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-09-11 12:06:43,851 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:43,851 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:44,051 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:44,052 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:44,053 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:44,053 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-09-11 12:06:44,053 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:44,054 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791235223] [2020-09-11 12:06:44,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:44,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791235223] [2020-09-11 12:06:44,169 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [86851874] [2020-09-11 12:06:44,170 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 [2020-09-11 12:06:44,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:44,246 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:44,247 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-09-11 12:06:44,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:44,292 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:44,307 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,308 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:44,308 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-09-11 12:06:44,308 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787680285] [2020-09-11 12:06:44,309 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:44,309 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:44,310 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:44,310 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:44,310 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-09-11 12:06:44,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:44,532 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-09-11 12:06:44,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:44,533 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-09-11 12:06:44,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:44,533 INFO L225 Difference]: With dead ends: 62 [2020-09-11 12:06:44,533 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:44,534 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 [2020-09-11 12:06:44,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:44,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-09-11 12:06:44,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-09-11 12:06:44,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-09-11 12:06:44,540 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-09-11 12:06:44,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:44,543 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-09-11 12:06:44,543 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:44,543 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-09-11 12:06:44,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:44,544 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:44,544 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:44,755 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-09-11 12:06:44,755 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:44,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:44,756 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-09-11 12:06:44,756 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:44,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759863701] [2020-09-11 12:06:44,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:44,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:44,834 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759863701] [2020-09-11 12:06:44,835 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545356037] [2020-09-11 12:06:44,835 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 [2020-09-11 12:06:44,889 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-09-11 12:06:44,889 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:44,890 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:44,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:44,906 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:44,906 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:44,906 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 12:06:44,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463330741] [2020-09-11 12:06:44,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:44,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:44,908 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:44,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:44,908 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-09-11 12:06:45,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:45,019 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-09-11 12:06:45,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:06:45,020 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 12:06:45,020 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:45,020 INFO L225 Difference]: With dead ends: 64 [2020-09-11 12:06:45,020 INFO L226 Difference]: Without dead ends: 58 [2020-09-11 12:06:45,021 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:06:45,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-09-11 12:06:45,024 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-09-11 12:06:45,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 12:06:45,025 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-09-11 12:06:45,025 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-09-11 12:06:45,025 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:45,026 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-09-11 12:06:45,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:45,026 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-09-11 12:06:45,026 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:45,027 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:45,027 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:45,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:45,228 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:45,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:45,229 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-09-11 12:06:45,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:45,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907104537] [2020-09-11 12:06:45,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:45,243 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:45,350 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:45,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907104537] [2020-09-11 12:06:45,351 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277760244] [2020-09-11 12:06:45,351 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 [2020-09-11 12:06:45,414 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:45,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:45,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:45,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:45,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:45,456 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:45,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:45,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:45,460 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456920496] [2020-09-11 12:06:45,460 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:45,460 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:45,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:45,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:45,461 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-09-11 12:06:45,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:45,666 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-09-11 12:06:45,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:45,667 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:45,668 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:45,669 INFO L225 Difference]: With dead ends: 61 [2020-09-11 12:06:45,669 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:45,670 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 [2020-09-11 12:06:45,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:45,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-09-11 12:06:45,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 12:06:45,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 12:06:45,682 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-09-11 12:06:45,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:45,682 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 12:06:45,682 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:45,682 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 12:06:45,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:45,685 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:45,685 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:45,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:45,897 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:45,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:45,898 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-09-11 12:06:45,898 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:45,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169522310] [2020-09-11 12:06:45,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:45,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:46,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169522310] [2020-09-11 12:06:46,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956656121] [2020-09-11 12:06:46,023 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 [2020-09-11 12:06:46,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:46,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:46,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:46,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:46,099 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,099 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:46,099 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-09-11 12:06:46,100 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [605714152] [2020-09-11 12:06:46,100 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-09-11 12:06:46,100 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:46,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-09-11 12:06:46,101 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-09-11 12:06:46,101 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-09-11 12:06:46,258 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:46,259 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 12:06:46,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:46,259 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-09-11 12:06:46,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:46,260 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:06:46,260 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:06:46,261 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 [2020-09-11 12:06:46,262 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:06:46,265 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-09-11 12:06:46,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 12:06:46,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-09-11 12:06:46,266 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-09-11 12:06:46,266 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:46,266 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-09-11 12:06:46,266 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-09-11 12:06:46,266 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-09-11 12:06:46,267 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:46,267 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:46,267 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:46,468 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-09-11 12:06:46,469 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:46,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:46,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-09-11 12:06:46,470 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:46,470 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [974099787] [2020-09-11 12:06:46,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:46,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:46,575 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [974099787] [2020-09-11 12:06:46,575 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836921728] [2020-09-11 12:06:46,576 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 [2020-09-11 12:06:46,643 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-09-11 12:06:46,643 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:46,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:46,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:46,710 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:46,719 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:46,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:46,720 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:46,720 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528493571] [2020-09-11 12:06:46,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:46,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:46,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:46,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:46,722 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-09-11 12:06:46,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:46,955 INFO L93 Difference]: Finished difference Result 58 states and 137 transitions. [2020-09-11 12:06:46,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:46,955 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:46,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:46,956 INFO L225 Difference]: With dead ends: 58 [2020-09-11 12:06:46,956 INFO L226 Difference]: Without dead ends: 50 [2020-09-11 12:06:46,957 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 [2020-09-11 12:06:46,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-09-11 12:06:46,959 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 37. [2020-09-11 12:06:46,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-09-11 12:06:46,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-09-11 12:06:46,960 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-09-11 12:06:46,960 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:46,963 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-09-11 12:06:46,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:46,964 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-09-11 12:06:46,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-09-11 12:06:46,964 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:46,965 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:47,165 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:47,166 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:47,166 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:47,167 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-09-11 12:06:47,167 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:47,167 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [692780843] [2020-09-11 12:06:47,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:47,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [692780843] [2020-09-11 12:06:47,236 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [634286888] [2020-09-11 12:06:47,237 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 [2020-09-11 12:06:47,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-09-11 12:06:47,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:47,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:47,345 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:47,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-09-11 12:06:47,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [700727074] [2020-09-11 12:06:47,346 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:47,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:47,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:47,347 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-09-11 12:06:47,572 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:47,572 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-09-11 12:06:47,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:47,573 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-09-11 12:06:47,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:47,574 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:47,574 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:47,575 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 [2020-09-11 12:06:47,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:47,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-09-11 12:06:47,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:47,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:47,579 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-09-11 12:06:47,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:47,579 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:47,579 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:47,580 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:47,580 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:47,580 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:47,580 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:47,791 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-09-11 12:06:47,792 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:47,792 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:47,792 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-09-11 12:06:47,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:47,793 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873431376] [2020-09-11 12:06:47,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:47,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:47,879 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,879 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873431376] [2020-09-11 12:06:47,880 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [855411236] [2020-09-11 12:06:47,880 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 [2020-09-11 12:06:47,931 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:47,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:47,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:47,933 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:47,955 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:47,966 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:47,966 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:47,966 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:47,967 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340939400] [2020-09-11 12:06:47,967 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:47,967 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:47,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:47,968 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:47,968 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-09-11 12:06:48,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:48,193 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-09-11 12:06:48,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:48,193 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:48,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:48,194 INFO L225 Difference]: With dead ends: 54 [2020-09-11 12:06:48,194 INFO L226 Difference]: Without dead ends: 49 [2020-09-11 12:06:48,195 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 [2020-09-11 12:06:48,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-09-11 12:06:48,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-09-11 12:06:48,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-09-11 12:06:48,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-09-11 12:06:48,199 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-09-11 12:06:48,200 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:48,200 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-09-11 12:06:48,200 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:48,200 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-09-11 12:06:48,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:48,201 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:48,201 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:48,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-09-11 12:06:48,410 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:48,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:48,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-09-11 12:06:48,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:48,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1521520763] [2020-09-11 12:06:48,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:48,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:48,511 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:48,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1521520763] [2020-09-11 12:06:48,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691392799] [2020-09-11 12:06:48,512 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 [2020-09-11 12:06:48,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:48,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:48,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:48,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:48,587 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:48,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:48,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:48,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2011032566] [2020-09-11 12:06:48,588 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:48,588 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:48,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:48,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:48,589 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-09-11 12:06:48,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:48,711 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-09-11 12:06:48,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-09-11 12:06:48,712 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:48,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:48,713 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:48,713 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:48,714 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 [2020-09-11 12:06:48,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:48,716 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-09-11 12:06:48,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:48,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-09-11 12:06:48,717 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-09-11 12:06:48,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:48,718 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-09-11 12:06:48,718 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:48,718 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-09-11 12:06:48,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:48,718 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:48,718 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:48,929 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-09-11 12:06:48,930 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:48,930 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:48,930 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-09-11 12:06:48,931 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:48,931 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [758716638] [2020-09-11 12:06:48,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:48,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,024 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [758716638] [2020-09-11 12:06:49,025 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1562832683] [2020-09-11 12:06:49,025 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 [2020-09-11 12:06:49,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:49,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:49,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:49,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:49,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:49,107 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,108 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:49,108 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:49,108 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [207989184] [2020-09-11 12:06:49,108 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:49,109 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:49,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:49,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:49,109 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-09-11 12:06:49,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:49,276 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-09-11 12:06:49,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-09-11 12:06:49,277 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:49,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:49,278 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:06:49,278 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:06:49,279 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 [2020-09-11 12:06:49,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:06:49,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-09-11 12:06:49,282 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-09-11 12:06:49,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-09-11 12:06:49,282 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-09-11 12:06:49,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:49,283 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-09-11 12:06:49,283 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:49,283 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-09-11 12:06:49,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:49,283 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:49,283 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:49,493 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-09-11 12:06:49,494 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:49,494 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:49,494 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-09-11 12:06:49,494 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:49,495 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [273206019] [2020-09-11 12:06:49,495 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:49,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:49,591 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [273206019] [2020-09-11 12:06:49,592 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139281376] [2020-09-11 12:06:49,593 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 [2020-09-11 12:06:49,656 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:49,656 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:49,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:49,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:49,680 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:49,681 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:49,681 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:49,681 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1745799621] [2020-09-11 12:06:49,681 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:49,681 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:49,684 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:49,684 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:49,684 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-09-11 12:06:49,884 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:49,885 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-09-11 12:06:49,885 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:49,885 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:49,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:49,886 INFO L225 Difference]: With dead ends: 67 [2020-09-11 12:06:49,887 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:49,887 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 [2020-09-11 12:06:49,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:49,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-09-11 12:06:49,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-09-11 12:06:49,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-09-11 12:06:49,891 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-09-11 12:06:49,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:49,892 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-09-11 12:06:49,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:49,892 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-09-11 12:06:49,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:49,892 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:49,893 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:50,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:50,095 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:50,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:50,095 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-09-11 12:06:50,095 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:50,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176420279] [2020-09-11 12:06:50,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:50,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:50,193 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,193 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176420279] [2020-09-11 12:06:50,194 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831595420] [2020-09-11 12:06:50,194 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 [2020-09-11 12:06:50,245 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:50,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:50,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:50,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:50,273 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:50,289 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,290 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:50,290 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:50,290 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [580971911] [2020-09-11 12:06:50,290 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:50,291 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:50,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:50,291 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:50,291 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-09-11 12:06:50,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:50,561 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-09-11 12:06:50,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:50,562 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:50,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:50,562 INFO L225 Difference]: With dead ends: 69 [2020-09-11 12:06:50,563 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 12:06:50,563 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 [2020-09-11 12:06:50,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 12:06:50,565 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-09-11 12:06:50,565 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:06:50,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-09-11 12:06:50,566 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-09-11 12:06:50,566 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:50,566 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-09-11 12:06:50,566 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:50,566 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-09-11 12:06:50,567 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:50,569 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:50,569 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:50,769 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:50,770 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:50,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:50,770 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-09-11 12:06:50,771 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:50,771 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797801908] [2020-09-11 12:06:50,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:50,782 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:50,846 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,846 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797801908] [2020-09-11 12:06:50,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039976570] [2020-09-11 12:06:50,847 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 [2020-09-11 12:06:50,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:50,900 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:50,901 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:50,915 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:50,915 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:50,915 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-09-11 12:06:50,916 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742321477] [2020-09-11 12:06:50,916 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-09-11 12:06:50,916 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:50,916 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-09-11 12:06:50,916 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-09-11 12:06:50,917 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-09-11 12:06:51,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:51,178 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 12:06:51,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:51,179 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-09-11 12:06:51,180 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:51,180 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:06:51,180 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 12:06:51,181 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:06:51,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 12:06:51,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-09-11 12:06:51,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:51,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-09-11 12:06:51,184 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-09-11 12:06:51,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:51,185 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-09-11 12:06:51,185 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-09-11 12:06:51,185 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-09-11 12:06:51,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-09-11 12:06:51,185 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:51,186 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:51,387 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:51,387 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:51,388 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:51,388 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-09-11 12:06:51,388 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:51,389 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906187061] [2020-09-11 12:06:51,389 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:51,407 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:51,480 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:51,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906187061] [2020-09-11 12:06:51,481 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [912941012] [2020-09-11 12:06:51,481 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 [2020-09-11 12:06:51,537 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:51,537 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:51,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-09-11 12:06:51,539 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:51,563 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:51,573 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:51,573 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:51,573 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-09-11 12:06:51,574 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163621608] [2020-09-11 12:06:51,574 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:51,574 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:51,574 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:51,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:51,575 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-09-11 12:06:51,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:51,875 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-09-11 12:06:51,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:51,875 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-09-11 12:06:51,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:51,876 INFO L225 Difference]: With dead ends: 69 [2020-09-11 12:06:51,876 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:51,877 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 [2020-09-11 12:06:51,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:51,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-09-11 12:06:51,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 12:06:51,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-09-11 12:06:51,883 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-09-11 12:06:51,883 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:51,883 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-09-11 12:06:51,883 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:51,883 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-09-11 12:06:51,884 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:51,884 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:51,884 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:52,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-09-11 12:06:52,085 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:52,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:52,085 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-09-11 12:06:52,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:52,086 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1349912204] [2020-09-11 12:06:52,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:52,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1349912204] [2020-09-11 12:06:52,192 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [435951564] [2020-09-11 12:06:52,193 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 [2020-09-11 12:06:52,245 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:52,245 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:52,246 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:52,248 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:52,262 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:52,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:52,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191165541] [2020-09-11 12:06:52,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:52,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:52,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:52,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:52,264 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-09-11 12:06:52,406 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:52,406 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-09-11 12:06:52,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:52,407 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:52,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:52,408 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:06:52,408 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:06:52,408 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 [2020-09-11 12:06:52,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:06:52,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-09-11 12:06:52,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:52,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:52,411 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 12:06:52,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:52,412 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:52,412 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:52,412 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:52,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:52,412 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:52,413 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:52,622 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-09-11 12:06:52,623 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:52,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:52,623 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-09-11 12:06:52,623 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:52,624 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068172580] [2020-09-11 12:06:52,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:52,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:52,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068172580] [2020-09-11 12:06:52,721 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1668293893] [2020-09-11 12:06:52,722 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 [2020-09-11 12:06:52,775 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:52,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:52,775 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:52,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:52,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:52,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:52,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:52,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:52,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1545179553] [2020-09-11 12:06:52,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:52,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:52,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:52,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:52,814 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 12:06:53,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:53,068 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-09-11 12:06:53,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:53,068 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:53,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:53,069 INFO L225 Difference]: With dead ends: 71 [2020-09-11 12:06:53,070 INFO L226 Difference]: Without dead ends: 65 [2020-09-11 12:06:53,070 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 [2020-09-11 12:06:53,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-09-11 12:06:53,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-09-11 12:06:53,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:53,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:53,074 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 12:06:53,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:53,074 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:53,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:53,074 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:53,074 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:53,074 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:53,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:53,283 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-09-11 12:06:53,283 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:53,284 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:53,284 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-09-11 12:06:53,284 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:53,285 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1522583905] [2020-09-11 12:06:53,285 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:53,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:53,372 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:53,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1522583905] [2020-09-11 12:06:53,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100592770] [2020-09-11 12:06:53,373 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 [2020-09-11 12:06:53,428 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-09-11 12:06:53,428 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:53,429 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:53,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:53,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:53,457 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:53,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:53,457 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631627054] [2020-09-11 12:06:53,457 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:53,458 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:53,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:53,458 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:53,458 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 12:06:53,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:53,690 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-09-11 12:06:53,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:06:53,691 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:53,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:53,693 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:06:53,693 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 12:06:53,693 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 [2020-09-11 12:06:53,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 12:06:53,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-09-11 12:06:53,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:53,696 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:53,696 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-09-11 12:06:53,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:53,697 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:53,697 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:53,697 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:53,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:53,697 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:53,698 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:53,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-09-11 12:06:53,906 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:53,907 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:53,907 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-09-11 12:06:53,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:53,908 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006082612] [2020-09-11 12:06:53,908 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:53,918 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:53,995 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:53,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006082612] [2020-09-11 12:06:53,996 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [142017755] [2020-09-11 12:06:53,996 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 [2020-09-11 12:06:54,053 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-09-11 12:06:54,053 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:54,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:54,064 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:54,086 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:54,096 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:54,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:54,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2142046887] [2020-09-11 12:06:54,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:54,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:54,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:54,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:54,097 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-09-11 12:06:54,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:54,435 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-09-11 12:06:54,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:54,436 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:54,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:54,437 INFO L225 Difference]: With dead ends: 67 [2020-09-11 12:06:54,437 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:06:54,437 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 [2020-09-11 12:06:54,438 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:06:54,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-09-11 12:06:54,440 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:54,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:06:54,441 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-09-11 12:06:54,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:54,441 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:06:54,441 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:54,441 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:06:54,441 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:54,441 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:54,442 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:54,642 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-09-11 12:06:54,642 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:54,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:54,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-09-11 12:06:54,643 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:54,644 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1330762147] [2020-09-11 12:06:54,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:54,740 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1330762147] [2020-09-11 12:06:54,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138211102] [2020-09-11 12:06:54,741 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 [2020-09-11 12:06:54,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:54,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:54,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:54,807 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:54,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:54,808 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-09-11 12:06:54,808 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864423531] [2020-09-11 12:06:54,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-09-11 12:06:54,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:54,809 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-09-11 12:06:54,809 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-09-11 12:06:54,809 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-09-11 12:06:55,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:55,067 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 12:06:55,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:55,068 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-09-11 12:06:55,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:55,069 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:06:55,070 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:06:55,070 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 [2020-09-11 12:06:55,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:06:55,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-09-11 12:06:55,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:06:55,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-09-11 12:06:55,074 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-09-11 12:06:55,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:55,074 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-09-11 12:06:55,074 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-09-11 12:06:55,074 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-09-11 12:06:55,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:55,075 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:55,075 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:55,284 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:55,285 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:55,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:55,285 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-09-11 12:06:55,285 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:55,286 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60854128] [2020-09-11 12:06:55,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:55,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:55,371 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:55,371 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60854128] [2020-09-11 12:06:55,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58643255] [2020-09-11 12:06:55,372 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 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 [2020-09-11 12:06:55,415 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:55,416 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:55,417 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:55,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:55,456 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:55,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:55,457 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:55,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283460826] [2020-09-11 12:06:55,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:55,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:55,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:55,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:55,460 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-09-11 12:06:55,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:55,842 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-09-11 12:06:55,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:06:55,843 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:55,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:55,844 INFO L225 Difference]: With dead ends: 62 [2020-09-11 12:06:55,844 INFO L226 Difference]: Without dead ends: 54 [2020-09-11 12:06:55,844 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:06:55,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-09-11 12:06:55,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-09-11 12:06:55,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-09-11 12:06:55,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-09-11 12:06:55,847 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-09-11 12:06:55,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:55,847 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-09-11 12:06:55,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:55,847 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-09-11 12:06:55,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-09-11 12:06:55,848 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:55,848 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:56,056 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-09-11 12:06:56,056 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:56,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:56,057 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-09-11 12:06:56,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:56,058 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [521657187] [2020-09-11 12:06:56,058 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:56,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:56,138 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:56,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [521657187] [2020-09-11 12:06:56,139 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1916889123] [2020-09-11 12:06:56,139 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 [2020-09-11 12:06:56,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-09-11 12:06:56,195 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:56,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-09-11 12:06:56,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:56,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:56,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:56,231 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:56,232 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-09-11 12:06:56,232 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1108383751] [2020-09-11 12:06:56,232 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:56,232 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:56,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:56,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:56,233 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-09-11 12:06:56,515 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:56,516 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-09-11 12:06:56,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:56,516 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-09-11 12:06:56,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:56,517 INFO L225 Difference]: With dead ends: 68 [2020-09-11 12:06:56,517 INFO L226 Difference]: Without dead ends: 63 [2020-09-11 12:06:56,517 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:06:56,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-09-11 12:06:56,519 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-09-11 12:06:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:06:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 12:06:56,520 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-09-11 12:06:56,520 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:56,520 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 12:06:56,521 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:56,521 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 12:06:56,521 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:56,521 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:56,521 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:56,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-09-11 12:06:56,730 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:56,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:56,731 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-09-11 12:06:56,731 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:56,731 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23988406] [2020-09-11 12:06:56,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:56,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:56,821 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:56,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23988406] [2020-09-11 12:06:56,822 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144315572] [2020-09-11 12:06:56,822 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 [2020-09-11 12:06:56,874 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:06:56,874 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:56,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:56,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:56,903 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:06:56,917 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:56,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:56,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:56,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417299751] [2020-09-11 12:06:56,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:56,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:56,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:56,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:56,919 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-09-11 12:06:57,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:57,286 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-09-11 12:06:57,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:57,286 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:57,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:57,287 INFO L225 Difference]: With dead ends: 60 [2020-09-11 12:06:57,288 INFO L226 Difference]: Without dead ends: 55 [2020-09-11 12:06:57,289 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 [2020-09-11 12:06:57,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-09-11 12:06:57,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-09-11 12:06:57,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-09-11 12:06:57,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-09-11 12:06:57,291 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-09-11 12:06:57,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:57,291 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-09-11 12:06:57,292 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:57,292 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-09-11 12:06:57,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:57,292 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:57,292 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:57,502 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:57,502 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:57,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:57,503 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-09-11 12:06:57,503 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:57,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1828106679] [2020-09-11 12:06:57,504 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:57,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:57,625 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:57,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1828106679] [2020-09-11 12:06:57,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1715070827] [2020-09-11 12:06:57,626 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 [2020-09-11 12:06:57,683 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:06:57,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:57,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:57,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:57,697 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:57,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:57,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:57,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1262625404] [2020-09-11 12:06:57,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:57,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:57,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:57,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:57,699 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-09-11 12:06:57,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:57,874 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-09-11 12:06:57,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-09-11 12:06:57,874 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:57,875 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:57,876 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:06:57,876 INFO L226 Difference]: Without dead ends: 60 [2020-09-11 12:06:57,877 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 [2020-09-11 12:06:57,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-09-11 12:06:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-09-11 12:06:57,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:06:57,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-09-11 12:06:57,880 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-09-11 12:06:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:57,880 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-09-11 12:06:57,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:57,880 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-09-11 12:06:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:57,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:57,881 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:58,090 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:58,090 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:58,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:58,091 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-09-11 12:06:58,091 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:58,092 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1771608625] [2020-09-11 12:06:58,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:58,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,287 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1771608625] [2020-09-11 12:06:58,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979337980] [2020-09-11 12:06:58,288 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 [2020-09-11 12:06:58,353 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:06:58,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:58,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:58,356 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:58,377 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:58,402 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,402 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:58,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:58,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [631853847] [2020-09-11 12:06:58,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:58,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:58,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:58,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:58,410 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-09-11 12:06:58,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:58,657 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-09-11 12:06:58,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-09-11 12:06:58,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:06:58,659 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:58,660 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:06:58,660 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:06:58,660 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 [2020-09-11 12:06:58,661 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:06:58,666 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-09-11 12:06:58,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-09-11 12:06:58,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-09-11 12:06:58,668 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-09-11 12:06:58,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:58,668 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-09-11 12:06:58,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:06:58,669 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-09-11 12:06:58,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:58,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:58,670 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:58,882 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-09-11 12:06:58,882 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:58,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:58,882 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-09-11 12:06:58,882 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:58,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575121211] [2020-09-11 12:06:58,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:58,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:58,982 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:58,982 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575121211] [2020-09-11 12:06:58,983 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1810340623] [2020-09-11 12:06:58,983 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 [2020-09-11 12:06:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:59,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:59,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:59,044 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:59,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:59,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:06:59,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041012443] [2020-09-11 12:06:59,046 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:06:59,046 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:59,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:06:59,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:06:59,046 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-09-11 12:06:59,303 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:06:59,303 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-09-11 12:06:59,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:06:59,304 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:06:59,304 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:06:59,304 INFO L225 Difference]: With dead ends: 75 [2020-09-11 12:06:59,305 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 12:06:59,305 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 [2020-09-11 12:06:59,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 12:06:59,308 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-09-11 12:06:59,308 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-09-11 12:06:59,309 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-09-11 12:06:59,310 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-09-11 12:06:59,310 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:06:59,310 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-09-11 12:06:59,310 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:06:59,311 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-09-11 12:06:59,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:06:59,311 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:06:59,311 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:06:59,512 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:06:59,512 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:06:59,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:06:59,513 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-09-11 12:06:59,513 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:06:59,514 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560460978] [2020-09-11 12:06:59,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:06:59,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:06:59,618 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:59,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560460978] [2020-09-11 12:06:59,618 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2099848138] [2020-09-11 12:06:59,618 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 [2020-09-11 12:06:59,671 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:06:59,671 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:06:59,672 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:06:59,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:06:59,689 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:06:59,701 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:06:59,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:06:59,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:06:59,702 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328634919] [2020-09-11 12:06:59,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:06:59,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:06:59,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:06:59,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:06:59,703 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-09-11 12:07:00,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:00,016 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-09-11 12:07:00,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:07:00,017 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:07:00,017 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:00,018 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:07:00,018 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:07:00,018 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 84 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:07:00,019 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:07:00,021 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-09-11 12:07:00,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:07:00,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-09-11 12:07:00,022 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-09-11 12:07:00,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:00,023 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-09-11 12:07:00,023 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:00,023 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-09-11 12:07:00,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:07:00,024 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:00,024 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:00,234 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-09-11 12:07:00,234 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:00,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:00,235 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-09-11 12:07:00,235 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:00,236 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493257315] [2020-09-11 12:07:00,236 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:00,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:00,356 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:00,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493257315] [2020-09-11 12:07:00,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1238834783] [2020-09-11 12:07:00,357 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 [2020-09-11 12:07:00,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:07:00,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:00,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:07:00,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:00,481 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:00,481 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:00,482 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:07:00,482 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [115750079] [2020-09-11 12:07:00,482 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:07:00,482 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:00,483 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:07:00,483 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:07:00,483 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-09-11 12:07:00,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:00,769 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-09-11 12:07:00,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:00,769 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:07:00,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:00,770 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:07:00,770 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:07:00,771 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 [2020-09-11 12:07:00,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:07:00,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-09-11 12:07:00,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 12:07:00,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-09-11 12:07:00,773 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-09-11 12:07:00,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:00,773 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-09-11 12:07:00,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:07:00,774 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-09-11 12:07:00,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:07:00,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:00,774 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:00,983 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:00,983 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:00,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:00,984 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-09-11 12:07:00,984 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:00,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545660371] [2020-09-11 12:07:00,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:00,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:01,079 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545660371] [2020-09-11 12:07:01,079 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1100784290] [2020-09-11 12:07:01,079 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 [2020-09-11 12:07:01,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:01,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:01,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:07:01,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:01,171 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:01,186 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,187 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:01,187 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:07:01,187 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1830224813] [2020-09-11 12:07:01,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:01,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:01,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:01,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:01,189 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-09-11 12:07:01,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:01,593 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-09-11 12:07:01,593 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:01,594 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:07:01,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:01,594 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:01,594 INFO L226 Difference]: Without dead ends: 70 [2020-09-11 12:07:01,595 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 [2020-09-11 12:07:01,595 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-09-11 12:07:01,597 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-09-11 12:07:01,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:07:01,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-09-11 12:07:01,598 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-09-11 12:07:01,598 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:01,598 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-09-11 12:07:01,598 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:01,598 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-09-11 12:07:01,599 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:07:01,599 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:01,599 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:01,799 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-09-11 12:07:01,800 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:01,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:01,800 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-09-11 12:07:01,800 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:01,800 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1390833538] [2020-09-11 12:07:01,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:01,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:01,908 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1390833538] [2020-09-11 12:07:01,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2144127388] [2020-09-11 12:07:01,909 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 [2020-09-11 12:07:01,964 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:07:01,964 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:01,966 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-09-11 12:07:01,966 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:01,989 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:01,990 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:01,990 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-09-11 12:07:01,990 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [514379590] [2020-09-11 12:07:01,990 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-09-11 12:07:01,991 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:01,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-09-11 12:07:01,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-09-11 12:07:01,991 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-09-11 12:07:02,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:02,300 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-09-11 12:07:02,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:02,300 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-09-11 12:07:02,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:02,301 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:07:02,301 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:07:02,302 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 [2020-09-11 12:07:02,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:07:02,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-09-11 12:07:02,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:02,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-09-11 12:07:02,305 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-09-11 12:07:02,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:02,305 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-09-11 12:07:02,305 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-09-11 12:07:02,306 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-09-11 12:07:02,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-09-11 12:07:02,306 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:02,306 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:02,507 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-09-11 12:07:02,507 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:02,508 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:02,508 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-09-11 12:07:02,508 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:02,509 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [921481544] [2020-09-11 12:07:02,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:02,518 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:02,604 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:02,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [921481544] [2020-09-11 12:07:02,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1737428648] [2020-09-11 12:07:02,605 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 [2020-09-11 12:07:02,659 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:07:02,659 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:02,659 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:02,660 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:02,700 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:02,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:02,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-09-11 12:07:02,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740821884] [2020-09-11 12:07:02,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:02,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:02,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:02,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:02,703 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-09-11 12:07:03,137 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:03,138 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-09-11 12:07:03,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:03,138 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-09-11 12:07:03,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:03,139 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:07:03,140 INFO L226 Difference]: Without dead ends: 69 [2020-09-11 12:07:03,140 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-09-11 12:07:03,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-09-11 12:07:03,142 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-09-11 12:07:03,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:07:03,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-09-11 12:07:03,143 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-09-11 12:07:03,143 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:03,143 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-09-11 12:07:03,143 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:03,143 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-09-11 12:07:03,144 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:03,144 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:03,144 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:03,352 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-09-11 12:07:03,352 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:03,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:03,353 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-09-11 12:07:03,353 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:03,353 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2062904179] [2020-09-11 12:07:03,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:03,365 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:03,483 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:03,484 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2062904179] [2020-09-11 12:07:03,485 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2074287789] [2020-09-11 12:07:03,485 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 [2020-09-11 12:07:03,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:03,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:03,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:03,556 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:03,556 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:03,556 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:03,557 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1518090991] [2020-09-11 12:07:03,557 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:03,557 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:03,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:03,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:03,558 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-09-11 12:07:03,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:03,767 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 12:07:03,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:07:03,768 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:03,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:03,769 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:03,769 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:03,769 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 [2020-09-11 12:07:03,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:03,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-09-11 12:07:03,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:03,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:03,772 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:03,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:03,773 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:03,773 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:03,773 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:03,773 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:03,774 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:03,774 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:03,984 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-09-11 12:07:03,984 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:03,984 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:03,985 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-09-11 12:07:03,985 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:03,985 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [20299925] [2020-09-11 12:07:03,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:03,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:04,131 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:04,131 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [20299925] [2020-09-11 12:07:04,132 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1646820067] [2020-09-11 12:07:04,132 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 [2020-09-11 12:07:04,186 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:04,186 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:04,187 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:04,188 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:04,203 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:04,228 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:04,228 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:04,229 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:04,229 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470810880] [2020-09-11 12:07:04,229 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:04,229 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:04,229 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:04,230 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:04,230 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:04,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:04,530 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-09-11 12:07:04,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:07:04,531 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:04,532 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:04,532 INFO L225 Difference]: With dead ends: 81 [2020-09-11 12:07:04,533 INFO L226 Difference]: Without dead ends: 75 [2020-09-11 12:07:04,533 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 [2020-09-11 12:07:04,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-09-11 12:07:04,534 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-09-11 12:07:04,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:04,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:04,535 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:04,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:04,536 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:04,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:04,536 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:04,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:04,536 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:04,536 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:04,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-09-11 12:07:04,745 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:04,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:04,746 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-09-11 12:07:04,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:04,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690895963] [2020-09-11 12:07:04,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:04,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:04,857 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:04,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690895963] [2020-09-11 12:07:04,859 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1468288076] [2020-09-11 12:07:04,859 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 [2020-09-11 12:07:04,915 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:07:04,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:04,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:04,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:04,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:04,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:04,934 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [131464664] [2020-09-11 12:07:04,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:04,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:04,935 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:05,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:05,212 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-09-11 12:07:05,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:07:05,213 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:05,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:05,214 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:07:05,214 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:07:05,215 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 [2020-09-11 12:07:05,215 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:07:05,216 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-09-11 12:07:05,217 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:05,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:05,217 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:05,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:05,217 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:05,218 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:05,218 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:05,218 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:05,218 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:05,218 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:05,422 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-09-11 12:07:05,422 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:05,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:05,423 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-09-11 12:07:05,423 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:05,424 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [889058059] [2020-09-11 12:07:05,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:05,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:05,561 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:05,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [889058059] [2020-09-11 12:07:05,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1435354326] [2020-09-11 12:07:05,562 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 [2020-09-11 12:07:05,621 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:05,621 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:05,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:05,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:05,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:05,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:05,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:05,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533202400] [2020-09-11 12:07:05,655 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:05,655 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:05,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:05,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:05,656 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:06,045 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:06,046 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-09-11 12:07:06,047 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:06,047 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:06,047 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:06,048 INFO L225 Difference]: With dead ends: 77 [2020-09-11 12:07:06,048 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:07:06,048 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 [2020-09-11 12:07:06,048 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:07:06,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-09-11 12:07:06,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:06,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:06,050 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:06,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:06,051 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:06,051 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:06,051 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:06,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:06,051 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:06,052 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:06,261 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-09-11 12:07:06,261 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:06,262 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:06,262 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-09-11 12:07:06,262 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:06,263 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839938444] [2020-09-11 12:07:06,263 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:06,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:06,375 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:06,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839938444] [2020-09-11 12:07:06,376 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192020630] [2020-09-11 12:07:06,376 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 [2020-09-11 12:07:06,431 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-09-11 12:07:06,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:06,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:06,432 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:06,453 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:06,453 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:06,453 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:06,454 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530623246] [2020-09-11 12:07:06,454 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:06,454 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:06,454 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:06,455 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:06,455 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:06,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:06,798 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-09-11 12:07:06,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:06,799 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:06,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:06,800 INFO L225 Difference]: With dead ends: 74 [2020-09-11 12:07:06,800 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:07:06,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:07:06,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:07:06,803 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-09-11 12:07:06,803 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:06,803 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:06,804 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-09-11 12:07:06,804 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:06,804 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:06,804 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:06,804 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:06,804 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:06,805 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:06,805 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:07,015 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:07,015 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:07,016 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:07,016 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-09-11 12:07:07,016 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:07,017 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145039498] [2020-09-11 12:07:07,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:07,026 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:07,125 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:07,125 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145039498] [2020-09-11 12:07:07,126 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8663165] [2020-09-11 12:07:07,126 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 [2020-09-11 12:07:07,183 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-09-11 12:07:07,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:07,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:07,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:07,214 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:07,226 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:07,227 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:07,227 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:07,227 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924400142] [2020-09-11 12:07:07,228 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:07,228 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:07,228 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:07,228 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:07,229 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-09-11 12:07:07,716 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:07,717 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-09-11 12:07:07,717 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:07,717 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:07,718 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:07,719 INFO L225 Difference]: With dead ends: 73 [2020-09-11 12:07:07,719 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 12:07:07,720 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 [2020-09-11 12:07:07,720 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 12:07:07,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-09-11 12:07:07,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:07,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:07,722 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-09-11 12:07:07,723 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:07,723 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:07,723 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:07,723 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:07,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:07,723 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:07,724 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:07,933 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-09-11 12:07:07,933 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:07,934 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:07,934 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-09-11 12:07:07,934 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:07,935 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1504139816] [2020-09-11 12:07:07,935 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:07,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:08,041 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:08,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1504139816] [2020-09-11 12:07:08,042 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [594020889] [2020-09-11 12:07:08,042 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 [2020-09-11 12:07:08,111 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:08,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:08,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:08,129 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:08,130 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:08,130 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-09-11 12:07:08,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428530723] [2020-09-11 12:07:08,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-09-11 12:07:08,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:08,131 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-09-11 12:07:08,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-09-11 12:07:08,131 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-09-11 12:07:08,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:08,480 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 12:07:08,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:08,480 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-09-11 12:07:08,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:08,481 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:08,482 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:08,484 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 [2020-09-11 12:07:08,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:08,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-09-11 12:07:08,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 12:07:08,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-09-11 12:07:08,487 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-09-11 12:07:08,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:08,487 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-09-11 12:07:08,487 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-09-11 12:07:08,487 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-09-11 12:07:08,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:08,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:08,488 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:08,692 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:08,692 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:08,693 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:08,693 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-09-11 12:07:08,693 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:08,694 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723653455] [2020-09-11 12:07:08,694 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:08,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:08,807 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:08,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723653455] [2020-09-11 12:07:08,808 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [954095892] [2020-09-11 12:07:08,808 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 [2020-09-11 12:07:08,861 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:08,861 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:08,862 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:08,863 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:08,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:08,906 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:08,907 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:08,907 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:08,907 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718599302] [2020-09-11 12:07:08,907 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:08,907 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:08,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:08,908 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:08,908 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-09-11 12:07:09,424 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:09,425 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-09-11 12:07:09,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:09,425 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:09,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:09,426 INFO L225 Difference]: With dead ends: 70 [2020-09-11 12:07:09,426 INFO L226 Difference]: Without dead ends: 62 [2020-09-11 12:07:09,427 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 [2020-09-11 12:07:09,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-09-11 12:07:09,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-09-11 12:07:09,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-09-11 12:07:09,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-09-11 12:07:09,430 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-09-11 12:07:09,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:09,430 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-09-11 12:07:09,430 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:09,430 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-09-11 12:07:09,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-09-11 12:07:09,431 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:09,431 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:09,640 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-09-11 12:07:09,640 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:09,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:09,641 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-09-11 12:07:09,641 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:09,641 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1862305909] [2020-09-11 12:07:09,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:09,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:09,750 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:09,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1862305909] [2020-09-11 12:07:09,751 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [991391518] [2020-09-11 12:07:09,751 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 [2020-09-11 12:07:09,821 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-09-11 12:07:09,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:09,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-09-11 12:07:09,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:09,851 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:09,868 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:09,869 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:09,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-09-11 12:07:09,870 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [701591828] [2020-09-11 12:07:09,870 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:09,870 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:09,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:09,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:09,871 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-09-11 12:07:10,327 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:10,327 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-09-11 12:07:10,328 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:10,328 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-09-11 12:07:10,328 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:10,329 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:10,329 INFO L226 Difference]: Without dead ends: 71 [2020-09-11 12:07:10,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-09-11 12:07:10,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-09-11 12:07:10,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-09-11 12:07:10,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:10,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 12:07:10,333 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-09-11 12:07:10,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:10,333 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 12:07:10,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:10,333 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 12:07:10,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:10,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:10,334 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:10,543 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:10,543 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:10,544 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:10,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-09-11 12:07:10,544 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:10,545 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [6408294] [2020-09-11 12:07:10,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:10,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:10,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [6408294] [2020-09-11 12:07:10,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1046165942] [2020-09-11 12:07:10,663 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 [2020-09-11 12:07:10,732 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:10,732 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:10,733 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:10,734 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:10,755 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:10,768 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:10,768 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:10,768 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:10,769 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690682904] [2020-09-11 12:07:10,769 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:10,769 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:10,769 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:10,770 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:10,770 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-09-11 12:07:11,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:11,250 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-09-11 12:07:11,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:11,251 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:11,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:11,252 INFO L225 Difference]: With dead ends: 66 [2020-09-11 12:07:11,252 INFO L226 Difference]: Without dead ends: 61 [2020-09-11 12:07:11,253 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 [2020-09-11 12:07:11,254 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-09-11 12:07:11,255 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-09-11 12:07:11,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-09-11 12:07:11,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-09-11 12:07:11,256 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-09-11 12:07:11,256 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:11,256 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-09-11 12:07:11,256 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:11,256 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-09-11 12:07:11,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:11,257 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:11,257 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:11,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-09-11 12:07:11,468 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:11,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:11,468 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-09-11 12:07:11,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:11,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1852925793] [2020-09-11 12:07:11,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:11,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:11,608 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:11,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1852925793] [2020-09-11 12:07:11,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [457383173] [2020-09-11 12:07:11,609 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 [2020-09-11 12:07:11,665 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:11,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:11,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:11,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:11,697 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:11,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:11,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:11,697 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [354553442] [2020-09-11 12:07:11,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:11,699 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:11,699 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:11,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:11,700 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-09-11 12:07:11,924 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:11,924 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-09-11 12:07:11,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-09-11 12:07:11,925 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:11,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:11,926 INFO L225 Difference]: With dead ends: 72 [2020-09-11 12:07:11,926 INFO L226 Difference]: Without dead ends: 66 [2020-09-11 12:07:11,926 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 [2020-09-11 12:07:11,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-09-11 12:07:11,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-09-11 12:07:11,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:11,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-09-11 12:07:11,928 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-09-11 12:07:11,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:11,929 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-09-11 12:07:11,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:11,929 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-09-11 12:07:11,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:11,929 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:11,930 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:12,138 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-09-11 12:07:12,138 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:12,139 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:12,139 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-09-11 12:07:12,139 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:12,139 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707378133] [2020-09-11 12:07:12,140 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:12,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:12,281 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:12,281 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707378133] [2020-09-11 12:07:12,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1202547924] [2020-09-11 12:07:12,282 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 [2020-09-11 12:07:12,351 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:12,352 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:12,353 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:12,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:12,382 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:12,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:12,398 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:12,398 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1708801264] [2020-09-11 12:07:12,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:12,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:12,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:12,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:12,399 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-09-11 12:07:12,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:12,622 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-09-11 12:07:12,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-09-11 12:07:12,623 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:12,623 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:12,623 INFO L225 Difference]: With dead ends: 82 [2020-09-11 12:07:12,624 INFO L226 Difference]: Without dead ends: 76 [2020-09-11 12:07:12,624 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=162, Invalid=390, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:07:12,624 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-09-11 12:07:12,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-09-11 12:07:12,626 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-09-11 12:07:12,626 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-09-11 12:07:12,626 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-09-11 12:07:12,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:12,626 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-09-11 12:07:12,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:12,627 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-09-11 12:07:12,627 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:12,627 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:12,627 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:12,836 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-09-11 12:07:12,837 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:12,837 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:12,837 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-09-11 12:07:12,838 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:12,838 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058967737] [2020-09-11 12:07:12,838 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:12,848 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:12,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:12,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058967737] [2020-09-11 12:07:12,991 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041819487] [2020-09-11 12:07:12,991 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 [2020-09-11 12:07:13,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:13,048 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:13,065 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:13,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:13,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:13,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [332461615] [2020-09-11 12:07:13,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:13,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:13,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:13,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:13,067 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-09-11 12:07:13,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:13,404 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-09-11 12:07:13,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:13,405 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:13,405 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:13,406 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:07:13,406 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:13,407 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-09-11 12:07:13,407 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:13,408 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-09-11 12:07:13,409 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-09-11 12:07:13,409 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-09-11 12:07:13,409 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-09-11 12:07:13,409 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:13,410 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-09-11 12:07:13,410 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:13,410 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-09-11 12:07:13,410 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:13,410 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:13,410 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:13,620 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-09-11 12:07:13,620 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:13,621 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:13,621 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-09-11 12:07:13,622 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:13,622 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711438703] [2020-09-11 12:07:13,622 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:13,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:13,767 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:13,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711438703] [2020-09-11 12:07:13,767 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623065643] [2020-09-11 12:07:13,768 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 [2020-09-11 12:07:13,824 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:13,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:13,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:13,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:13,853 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:13,867 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:13,867 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:13,867 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:13,867 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165193075] [2020-09-11 12:07:13,868 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:13,868 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:13,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:13,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:13,868 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-09-11 12:07:14,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:14,239 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-09-11 12:07:14,243 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:14,244 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:14,244 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:14,244 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:14,244 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:14,245 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 [2020-09-11 12:07:14,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:14,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-09-11 12:07:14,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:14,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-09-11 12:07:14,247 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-09-11 12:07:14,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:14,248 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-09-11 12:07:14,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:14,248 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-09-11 12:07:14,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:14,248 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:14,248 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:14,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:14,457 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:14,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:14,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-09-11 12:07:14,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:14,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059459843] [2020-09-11 12:07:14,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:14,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:14,585 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:14,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059459843] [2020-09-11 12:07:14,586 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277465754] [2020-09-11 12:07:14,586 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 [2020-09-11 12:07:14,643 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:14,644 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:14,644 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:14,645 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:14,662 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:14,662 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:14,662 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:14,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584040021] [2020-09-11 12:07:14,663 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:14,663 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:14,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:14,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:14,663 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-09-11 12:07:15,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:15,037 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-09-11 12:07:15,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:15,037 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:15,038 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:15,038 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:15,039 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:15,039 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 [2020-09-11 12:07:15,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:15,042 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-09-11 12:07:15,042 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:07:15,042 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-09-11 12:07:15,042 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-09-11 12:07:15,042 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:15,043 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-09-11 12:07:15,043 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:15,043 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-09-11 12:07:15,043 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:15,043 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:15,043 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:15,253 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:15,253 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:15,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:15,254 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-09-11 12:07:15,254 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:15,255 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1560798601] [2020-09-11 12:07:15,255 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:15,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:15,398 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:15,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1560798601] [2020-09-11 12:07:15,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130489775] [2020-09-11 12:07:15,399 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 [2020-09-11 12:07:15,456 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:15,456 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:15,456 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:15,457 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:15,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:15,495 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:15,495 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:15,495 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:15,495 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [564250382] [2020-09-11 12:07:15,497 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:15,497 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:15,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:15,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:15,498 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-09-11 12:07:15,974 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:15,974 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-09-11 12:07:15,975 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:15,975 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:15,975 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:15,976 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:07:15,976 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:07:15,977 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 [2020-09-11 12:07:15,978 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:07:15,979 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-09-11 12:07:15,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:15,980 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-09-11 12:07:15,980 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-09-11 12:07:15,980 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:15,980 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-09-11 12:07:15,980 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:15,980 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-09-11 12:07:15,981 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:15,981 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:15,981 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:16,191 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-09-11 12:07:16,191 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:16,192 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:16,192 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-09-11 12:07:16,192 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:16,193 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454240393] [2020-09-11 12:07:16,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:16,204 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:16,313 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:16,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454240393] [2020-09-11 12:07:16,314 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102404213] [2020-09-11 12:07:16,314 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 [2020-09-11 12:07:16,373 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:16,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:16,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:16,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:16,393 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:16,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:16,393 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:16,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [311665055] [2020-09-11 12:07:16,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:16,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:16,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:16,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:16,395 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-09-11 12:07:16,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:16,814 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-09-11 12:07:16,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:16,815 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:16,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:16,816 INFO L225 Difference]: With dead ends: 87 [2020-09-11 12:07:16,816 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:07:16,817 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 [2020-09-11 12:07:16,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:07:16,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-09-11 12:07:16,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 12:07:16,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-09-11 12:07:16,820 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-09-11 12:07:16,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:16,820 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-09-11 12:07:16,820 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:16,820 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-09-11 12:07:16,820 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:16,821 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:16,821 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:17,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:17,029 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:17,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:17,029 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-09-11 12:07:17,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:17,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [492408502] [2020-09-11 12:07:17,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:17,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:17,152 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:17,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [492408502] [2020-09-11 12:07:17,153 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2026899692] [2020-09-11 12:07:17,153 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 [2020-09-11 12:07:17,223 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:17,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:17,224 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:17,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:17,254 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:17,266 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:17,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:17,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:17,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [506758565] [2020-09-11 12:07:17,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:17,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:17,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:17,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:17,267 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-09-11 12:07:17,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:17,790 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-09-11 12:07:17,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:17,790 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:17,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:17,791 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:17,792 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:17,793 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-09-11 12:07:17,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:17,795 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-09-11 12:07:17,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:17,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-09-11 12:07:17,796 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-09-11 12:07:17,796 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:17,796 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-09-11 12:07:17,796 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:17,796 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-09-11 12:07:17,796 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:17,796 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:17,796 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:17,997 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-09-11 12:07:17,997 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:17,998 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:17,998 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-09-11 12:07:17,998 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:17,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [74105450] [2020-09-11 12:07:17,999 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:18,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:18,118 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:18,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [74105450] [2020-09-11 12:07:18,119 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [887250792] [2020-09-11 12:07:18,119 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 [2020-09-11 12:07:18,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:18,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:18,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:18,191 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:18,191 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:18,192 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-09-11 12:07:18,192 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125347488] [2020-09-11 12:07:18,192 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-09-11 12:07:18,192 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:18,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-09-11 12:07:18,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-09-11 12:07:18,193 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-09-11 12:07:18,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:18,665 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 12:07:18,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:18,666 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-09-11 12:07:18,666 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:18,667 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:07:18,667 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:07:18,667 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 [2020-09-11 12:07:18,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:07:18,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-09-11 12:07:18,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:18,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-09-11 12:07:18,669 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-09-11 12:07:18,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:18,669 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-09-11 12:07:18,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-09-11 12:07:18,670 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-09-11 12:07:18,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-09-11 12:07:18,670 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:18,670 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:18,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-09-11 12:07:18,872 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:18,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:18,873 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-09-11 12:07:18,873 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:18,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514175012] [2020-09-11 12:07:18,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:18,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:19,000 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:19,000 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514175012] [2020-09-11 12:07:19,001 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630946601] [2020-09-11 12:07:19,001 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 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 [2020-09-11 12:07:19,061 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:19,061 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:19,062 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-09-11 12:07:19,063 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:19,094 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:19,105 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:19,105 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:19,105 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-09-11 12:07:19,105 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [67290983] [2020-09-11 12:07:19,106 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:19,106 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:19,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:19,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:19,107 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-09-11 12:07:19,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:19,709 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-09-11 12:07:19,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:19,709 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-09-11 12:07:19,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:19,710 INFO L225 Difference]: With dead ends: 85 [2020-09-11 12:07:19,710 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:19,711 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 [2020-09-11 12:07:19,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:19,712 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-09-11 12:07:19,712 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 12:07:19,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-09-11 12:07:19,713 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-09-11 12:07:19,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:19,713 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-09-11 12:07:19,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:19,713 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-09-11 12:07:19,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:19,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:19,714 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:19,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-09-11 12:07:19,923 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:19,923 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:19,924 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-09-11 12:07:19,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:19,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1602335645] [2020-09-11 12:07:19,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:19,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:20,115 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:20,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1602335645] [2020-09-11 12:07:20,116 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1166537732] [2020-09-11 12:07:20,116 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 [2020-09-11 12:07:20,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:20,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:20,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:20,170 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:20,188 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:20,188 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:20,188 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [307377469] [2020-09-11 12:07:20,188 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:20,188 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:20,189 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:20,189 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:20,189 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-09-11 12:07:20,414 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:20,414 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 12:07:20,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:07:20,415 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:20,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:20,416 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:07:20,416 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 12:07:20,416 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 [2020-09-11 12:07:20,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 12:07:20,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-09-11 12:07:20,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:20,418 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:20,419 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:20,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:20,419 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:20,419 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:20,419 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:20,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:20,420 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:20,420 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:20,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-09-11 12:07:20,628 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:20,629 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-09-11 12:07:20,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:20,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1283314328] [2020-09-11 12:07:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:20,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:20,799 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1283314328] [2020-09-11 12:07:20,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1086898474] [2020-09-11 12:07:20,800 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 [2020-09-11 12:07:20,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:20,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:20,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:20,874 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:20,902 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:20,917 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:20,918 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:20,918 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:20,918 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907707112] [2020-09-11 12:07:20,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:20,919 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:20,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:20,919 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:20,920 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:21,350 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:21,350 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-09-11 12:07:21,351 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:21,351 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:21,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:21,352 INFO L225 Difference]: With dead ends: 91 [2020-09-11 12:07:21,352 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:07:21,353 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:21,353 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:07:21,355 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 12:07:21,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:21,356 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:21,356 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:21,356 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:21,357 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:21,357 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:21,357 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:21,357 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:21,358 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:21,358 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:21,558 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-09-11 12:07:21,558 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:21,559 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:21,559 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-09-11 12:07:21,559 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:21,559 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1519716315] [2020-09-11 12:07:21,560 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:21,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:21,718 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:21,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1519716315] [2020-09-11 12:07:21,719 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384891579] [2020-09-11 12:07:21,719 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 [2020-09-11 12:07:21,776 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:21,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:21,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:21,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:21,793 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:21,793 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:21,793 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:21,793 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1905617356] [2020-09-11 12:07:21,794 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:21,794 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:21,794 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:21,794 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:21,794 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:22,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:22,152 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-09-11 12:07:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:22,152 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:22,154 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:07:22,154 INFO L226 Difference]: Without dead ends: 82 [2020-09-11 12:07:22,154 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 [2020-09-11 12:07:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-09-11 12:07:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-09-11 12:07:22,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:22,157 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:22,157 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:22,158 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:22,158 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:22,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:22,158 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:22,158 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:22,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:22,367 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:22,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:22,368 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-09-11 12:07:22,368 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:22,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [206777090] [2020-09-11 12:07:22,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:22,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:22,554 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:22,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [206777090] [2020-09-11 12:07:22,554 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452353968] [2020-09-11 12:07:22,555 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 [2020-09-11 12:07:22,631 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:22,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:22,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:22,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:22,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:22,681 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:22,682 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:22,684 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:22,684 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1498414961] [2020-09-11 12:07:22,684 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:22,685 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:22,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:22,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:22,685 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:23,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:23,117 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-09-11 12:07:23,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:23,118 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:23,118 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:23,119 INFO L225 Difference]: With dead ends: 87 [2020-09-11 12:07:23,119 INFO L226 Difference]: Without dead ends: 81 [2020-09-11 12:07:23,119 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 [2020-09-11 12:07:23,119 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-09-11 12:07:23,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-09-11 12:07:23,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:23,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:23,123 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:23,123 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:23,123 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:23,124 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:23,124 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:23,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:23,124 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:23,124 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:23,331 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:23,331 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:23,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:23,332 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-09-11 12:07:23,332 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:23,332 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [774923547] [2020-09-11 12:07:23,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:23,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:23,489 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:23,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [774923547] [2020-09-11 12:07:23,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [62375814] [2020-09-11 12:07:23,489 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 [2020-09-11 12:07:23,544 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:23,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:23,546 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:23,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:23,576 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:23,576 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:23,576 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1259087305] [2020-09-11 12:07:23,576 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:23,577 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:23,577 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:23,577 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:23,577 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:23,943 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:23,943 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-09-11 12:07:23,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:23,944 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:23,944 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:23,944 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:23,945 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:23,945 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 [2020-09-11 12:07:23,945 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:23,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-09-11 12:07:23,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:23,947 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:23,947 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:23,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:23,947 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:23,947 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:23,948 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:23,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:23,948 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:23,948 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:24,149 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-09-11 12:07:24,150 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:24,150 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:24,151 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-09-11 12:07:24,151 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:24,151 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703524289] [2020-09-11 12:07:24,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:24,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:24,312 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:24,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703524289] [2020-09-11 12:07:24,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779699201] [2020-09-11 12:07:24,313 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 [2020-09-11 12:07:24,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:24,370 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:24,370 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:24,371 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:24,392 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:24,407 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:24,407 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:24,408 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:24,408 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866059226] [2020-09-11 12:07:24,408 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:24,409 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:24,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:24,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:24,410 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:24,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:24,961 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-09-11 12:07:24,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:24,962 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:24,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:24,963 INFO L225 Difference]: With dead ends: 83 [2020-09-11 12:07:24,963 INFO L226 Difference]: Without dead ends: 77 [2020-09-11 12:07:24,963 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 [2020-09-11 12:07:24,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-09-11 12:07:24,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-09-11 12:07:24,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:24,965 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:24,965 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:24,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:24,965 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:24,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:24,966 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:24,966 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:24,966 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:24,966 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:25,169 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:25,170 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:25,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:25,170 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-09-11 12:07:25,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:25,171 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322201096] [2020-09-11 12:07:25,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:25,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:25,304 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:25,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322201096] [2020-09-11 12:07:25,305 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216273984] [2020-09-11 12:07:25,305 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 [2020-09-11 12:07:25,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-09-11 12:07:25,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:25,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:25,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:25,382 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:25,383 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:25,383 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:25,383 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [716697434] [2020-09-11 12:07:25,383 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:25,383 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:25,384 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:25,384 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:25,384 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:25,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:25,852 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-09-11 12:07:25,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:25,853 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:25,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:25,853 INFO L225 Difference]: With dead ends: 80 [2020-09-11 12:07:25,854 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 12:07:25,854 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 [2020-09-11 12:07:25,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 12:07:25,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-09-11 12:07:25,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:25,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:25,856 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-09-11 12:07:25,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:25,857 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:25,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:25,857 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:25,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:25,857 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:25,857 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:26,058 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-09-11 12:07:26,058 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:26,059 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:26,059 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-09-11 12:07:26,059 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:26,059 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1896658951] [2020-09-11 12:07:26,060 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:26,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:26,195 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:26,195 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1896658951] [2020-09-11 12:07:26,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858052514] [2020-09-11 12:07:26,196 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 [2020-09-11 12:07:26,251 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:26,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:26,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:26,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:26,279 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:26,291 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:26,292 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:26,292 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:26,292 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410432961] [2020-09-11 12:07:26,292 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:26,293 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:26,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:26,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:26,293 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-09-11 12:07:26,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:26,911 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-09-11 12:07:26,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:26,912 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:26,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:26,912 INFO L225 Difference]: With dead ends: 79 [2020-09-11 12:07:26,912 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:07:26,913 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 [2020-09-11 12:07:26,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:07:26,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-09-11 12:07:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:26,915 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-09-11 12:07:26,915 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:26,915 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:26,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:26,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:26,915 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:27,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:27,116 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:27,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:27,117 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-09-11 12:07:27,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:27,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011328496] [2020-09-11 12:07:27,118 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:27,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:27,251 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:27,251 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011328496] [2020-09-11 12:07:27,252 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1907533307] [2020-09-11 12:07:27,252 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 [2020-09-11 12:07:27,310 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-09-11 12:07:27,310 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:27,311 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:27,312 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:27,332 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:27,332 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:27,332 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-09-11 12:07:27,332 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [44157708] [2020-09-11 12:07:27,333 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-09-11 12:07:27,333 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:27,333 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-09-11 12:07:27,333 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-09-11 12:07:27,333 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-09-11 12:07:27,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:27,820 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 12:07:27,830 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:27,830 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-09-11 12:07:27,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:27,831 INFO L225 Difference]: With dead ends: 95 [2020-09-11 12:07:27,831 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 12:07:27,831 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 [2020-09-11 12:07:27,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 12:07:27,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-09-11 12:07:27,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:07:27,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-09-11 12:07:27,833 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-09-11 12:07:27,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:27,833 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-09-11 12:07:27,833 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-09-11 12:07:27,833 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-09-11 12:07:27,833 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:27,833 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:27,834 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:28,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-09-11 12:07:28,036 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:28,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:28,037 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-09-11 12:07:28,037 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:28,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065108251] [2020-09-11 12:07:28,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:28,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:28,155 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:28,155 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065108251] [2020-09-11 12:07:28,156 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1032883169] [2020-09-11 12:07:28,156 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 [2020-09-11 12:07:28,217 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-09-11 12:07:28,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:28,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:28,218 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:28,240 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:28,255 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:28,256 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:28,256 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:28,257 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2103920958] [2020-09-11 12:07:28,257 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:28,257 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:28,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:28,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:28,258 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-09-11 12:07:28,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:28,938 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-09-11 12:07:28,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:07:28,939 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:28,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:28,940 INFO L225 Difference]: With dead ends: 76 [2020-09-11 12:07:28,940 INFO L226 Difference]: Without dead ends: 68 [2020-09-11 12:07:28,940 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 [2020-09-11 12:07:28,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-09-11 12:07:28,942 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-09-11 12:07:28,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-09-11 12:07:28,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-09-11 12:07:28,943 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-09-11 12:07:28,943 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:28,943 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-09-11 12:07:28,943 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:28,943 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-09-11 12:07:28,944 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-09-11 12:07:28,944 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:28,944 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:29,152 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:29,152 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:29,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:29,153 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-09-11 12:07:29,153 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:29,154 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873453832] [2020-09-11 12:07:29,154 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:29,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:29,293 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:29,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873453832] [2020-09-11 12:07:29,293 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2138031355] [2020-09-11 12:07:29,293 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 [2020-09-11 12:07:29,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:29,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-09-11 12:07:29,352 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:29,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:29,389 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:29,390 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:29,390 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-09-11 12:07:29,390 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481905137] [2020-09-11 12:07:29,391 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:29,391 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:29,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:29,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:29,391 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-09-11 12:07:30,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:30,033 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-09-11 12:07:30,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:30,034 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-09-11 12:07:30,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:30,035 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:30,035 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 12:07:30,036 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 [2020-09-11 12:07:30,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 12:07:30,038 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-09-11 12:07:30,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:30,038 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 12:07:30,038 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-09-11 12:07:30,038 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:30,038 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 12:07:30,038 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:30,039 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 12:07:30,039 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:30,039 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:30,039 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:30,241 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-09-11 12:07:30,241 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:30,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:30,242 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-09-11 12:07:30,242 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:30,242 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1879384841] [2020-09-11 12:07:30,243 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:30,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:30,372 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:30,372 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1879384841] [2020-09-11 12:07:30,373 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837152632] [2020-09-11 12:07:30,373 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 [2020-09-11 12:07:30,426 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:30,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:30,427 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:30,428 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:30,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:30,472 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:30,472 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:30,472 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:30,472 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165110179] [2020-09-11 12:07:30,473 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:30,473 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:30,473 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:30,474 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:30,474 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-09-11 12:07:31,163 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:31,164 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-09-11 12:07:31,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:31,164 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:31,165 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:31,165 INFO L225 Difference]: With dead ends: 72 [2020-09-11 12:07:31,165 INFO L226 Difference]: Without dead ends: 67 [2020-09-11 12:07:31,166 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 [2020-09-11 12:07:31,166 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-09-11 12:07:31,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-09-11 12:07:31,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-09-11 12:07:31,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-09-11 12:07:31,168 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-09-11 12:07:31,168 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:31,168 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-09-11 12:07:31,168 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:31,169 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-09-11 12:07:31,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:31,169 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:31,169 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:31,372 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-09-11 12:07:31,373 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:31,373 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:31,373 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-09-11 12:07:31,373 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:31,374 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161977084] [2020-09-11 12:07:31,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:31,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:31,576 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:31,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161977084] [2020-09-11 12:07:31,577 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661918401] [2020-09-11 12:07:31,577 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 [2020-09-11 12:07:31,635 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:31,635 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:31,636 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:31,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:31,646 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:31,647 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:31,647 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:31,647 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1473161930] [2020-09-11 12:07:31,647 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:31,648 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:31,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:31,648 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:31,648 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-09-11 12:07:31,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:31,950 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-09-11 12:07:31,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-09-11 12:07:31,951 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:31,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:31,951 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:07:31,951 INFO L226 Difference]: Without dead ends: 72 [2020-09-11 12:07:31,952 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 [2020-09-11 12:07:31,952 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-09-11 12:07:31,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-09-11 12:07:31,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:31,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-09-11 12:07:31,953 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-09-11 12:07:31,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:31,954 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-09-11 12:07:31,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:31,954 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-09-11 12:07:31,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:31,954 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:31,954 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:32,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:32,155 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:32,155 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:32,156 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-09-11 12:07:32,156 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:32,156 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2019790316] [2020-09-11 12:07:32,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:32,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:32,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:32,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2019790316] [2020-09-11 12:07:32,361 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22680081] [2020-09-11 12:07:32,361 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 [2020-09-11 12:07:32,412 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:32,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:32,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:32,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:32,434 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:32,444 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:32,444 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:32,444 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:32,445 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [366633855] [2020-09-11 12:07:32,446 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:32,446 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:32,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:32,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:32,446 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-09-11 12:07:32,798 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:32,798 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-09-11 12:07:32,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-09-11 12:07:32,799 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:32,799 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:32,800 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:07:32,800 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 12:07:32,800 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=222, Invalid=534, Unknown=0, NotChecked=0, Total=756 [2020-09-11 12:07:32,801 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 12:07:32,802 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-09-11 12:07:32,802 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-09-11 12:07:32,802 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-09-11 12:07:32,803 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-09-11 12:07:32,803 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:32,803 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-09-11 12:07:32,803 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:32,803 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-09-11 12:07:32,803 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:32,803 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:32,804 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:33,012 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:33,012 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:33,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:33,013 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-09-11 12:07:33,013 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:33,013 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [373954729] [2020-09-11 12:07:33,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:33,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:33,200 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:33,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [373954729] [2020-09-11 12:07:33,200 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [551578827] [2020-09-11 12:07:33,200 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 [2020-09-11 12:07:33,260 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 12:07:33,261 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:33,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:33,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:33,274 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:33,275 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:33,275 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:33,275 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709733958] [2020-09-11 12:07:33,275 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:33,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:33,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:33,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:33,276 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-09-11 12:07:33,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:33,663 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-09-11 12:07:33,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:33,664 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:33,664 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:33,665 INFO L225 Difference]: With dead ends: 91 [2020-09-11 12:07:33,665 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:07:33,666 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 [2020-09-11 12:07:33,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:07:33,668 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-09-11 12:07:33,668 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-09-11 12:07:33,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-09-11 12:07:33,669 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-09-11 12:07:33,669 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:33,669 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-09-11 12:07:33,669 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:33,669 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-09-11 12:07:33,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:33,669 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:33,670 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:33,870 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:33,870 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:33,871 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:33,871 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-09-11 12:07:33,871 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:33,871 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [35646689] [2020-09-11 12:07:33,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:34,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [35646689] [2020-09-11 12:07:34,055 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [645328753] [2020-09-11 12:07:34,056 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 [2020-09-11 12:07:34,114 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 12:07:34,114 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:34,115 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:34,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:34,138 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:34,148 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:34,149 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:34,149 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:34,149 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854166759] [2020-09-11 12:07:34,149 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:34,149 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:34,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:34,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:34,150 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-09-11 12:07:34,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:34,533 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-09-11 12:07:34,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:34,534 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:34,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:34,535 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:07:34,535 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:07:34,536 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 [2020-09-11 12:07:34,537 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:07:34,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-09-11 12:07:34,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:07:34,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-09-11 12:07:34,539 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-09-11 12:07:34,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:34,540 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-09-11 12:07:34,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:34,540 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-09-11 12:07:34,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:34,541 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:34,541 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:34,742 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:34,742 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:34,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:34,742 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-09-11 12:07:34,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:34,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [40965688] [2020-09-11 12:07:34,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:34,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:34,944 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:34,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [40965688] [2020-09-11 12:07:34,944 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [135066789] [2020-09-11 12:07:34,945 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 [2020-09-11 12:07:35,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:35,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:35,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:35,047 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:35,047 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:35,047 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:35,047 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1523294498] [2020-09-11 12:07:35,048 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:35,048 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:35,048 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:35,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:35,049 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-09-11 12:07:35,475 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:35,475 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 12:07:35,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:35,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:35,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:35,477 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:07:35,477 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:07:35,478 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 [2020-09-11 12:07:35,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:07:35,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-09-11 12:07:35,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 12:07:35,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-09-11 12:07:35,480 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-09-11 12:07:35,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:35,481 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-09-11 12:07:35,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:35,481 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-09-11 12:07:35,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:35,481 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:35,481 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:35,689 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-09-11 12:07:35,689 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:35,690 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:35,690 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-09-11 12:07:35,690 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:35,690 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1123758973] [2020-09-11 12:07:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:35,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:35,869 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:35,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1123758973] [2020-09-11 12:07:35,869 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38439378] [2020-09-11 12:07:35,870 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 [2020-09-11 12:07:35,924 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:35,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:35,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:35,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:35,948 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:35,961 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:35,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:35,962 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:35,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [690935511] [2020-09-11 12:07:35,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:35,962 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:35,962 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:35,962 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:35,962 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-09-11 12:07:36,512 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:36,512 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-09-11 12:07:36,513 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:36,513 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:36,514 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:36,514 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:07:36,515 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:07:36,515 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 [2020-09-11 12:07:36,515 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:07:36,517 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-09-11 12:07:36,517 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 12:07:36,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-09-11 12:07:36,518 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-09-11 12:07:36,518 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:36,518 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-09-11 12:07:36,518 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:36,518 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-09-11 12:07:36,518 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:36,518 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:36,518 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:36,719 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:36,719 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:36,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:36,720 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-09-11 12:07:36,720 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:36,720 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [225872899] [2020-09-11 12:07:36,721 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:36,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:36,895 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:36,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [225872899] [2020-09-11 12:07:36,896 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217537195] [2020-09-11 12:07:36,896 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 [2020-09-11 12:07:36,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:36,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:36,958 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:36,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:36,979 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:36,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:36,979 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:36,979 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1796017120] [2020-09-11 12:07:36,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:36,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:36,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:36,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:36,980 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-09-11 12:07:37,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:37,482 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-09-11 12:07:37,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:37,483 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:37,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:37,483 INFO L225 Difference]: With dead ends: 97 [2020-09-11 12:07:37,484 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 12:07:37,484 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 [2020-09-11 12:07:37,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 12:07:37,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-09-11 12:07:37,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:07:37,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-09-11 12:07:37,487 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-09-11 12:07:37,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:37,488 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-09-11 12:07:37,488 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:37,488 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-09-11 12:07:37,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:37,488 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:37,488 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:37,693 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-09-11 12:07:37,694 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-09-11 12:07:37,694 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:37,695 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127967753] [2020-09-11 12:07:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:37,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:37,844 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:37,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127967753] [2020-09-11 12:07:37,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403742646] [2020-09-11 12:07:37,845 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 [2020-09-11 12:07:37,904 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:37,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:37,906 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:37,907 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:37,937 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:37,955 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:37,955 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:37,956 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:37,956 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832281831] [2020-09-11 12:07:37,956 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:37,957 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:37,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:37,957 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:37,957 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-09-11 12:07:38,655 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:38,655 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-09-11 12:07:38,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:38,656 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:38,656 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:38,657 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:07:38,658 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 12:07:38,658 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 [2020-09-11 12:07:38,659 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 12:07:38,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-09-11 12:07:38,661 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:38,661 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-09-11 12:07:38,662 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-09-11 12:07:38,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:38,662 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-09-11 12:07:38,662 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:38,663 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-09-11 12:07:38,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:38,663 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:38,663 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:38,875 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:38,875 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:38,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:38,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-09-11 12:07:38,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:38,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827824069] [2020-09-11 12:07:38,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:38,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:39,070 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:39,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827824069] [2020-09-11 12:07:39,070 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563858379] [2020-09-11 12:07:39,071 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 [2020-09-11 12:07:39,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 12:07:39,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:39,143 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:39,144 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:39,168 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:39,169 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:39,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:39,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997663441] [2020-09-11 12:07:39,170 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:39,170 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:39,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:39,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:39,171 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-09-11 12:07:39,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:39,670 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-09-11 12:07:39,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:07:39,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:39,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:39,671 INFO L225 Difference]: With dead ends: 95 [2020-09-11 12:07:39,671 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 12:07:39,672 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 [2020-09-11 12:07:39,672 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 12:07:39,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-09-11 12:07:39,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 12:07:39,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-09-11 12:07:39,674 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-09-11 12:07:39,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:39,674 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-09-11 12:07:39,674 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:39,675 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-09-11 12:07:39,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:39,675 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:39,675 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:39,884 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-09-11 12:07:39,884 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:39,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:39,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-09-11 12:07:39,885 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:39,885 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265085766] [2020-09-11 12:07:39,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:39,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:40,044 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:40,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265085766] [2020-09-11 12:07:40,045 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [38310194] [2020-09-11 12:07:40,045 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 [2020-09-11 12:07:40,104 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 12:07:40,104 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:40,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:40,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:40,129 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:40,152 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:40,153 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:40,153 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:40,153 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447052472] [2020-09-11 12:07:40,153 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:40,154 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:40,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:40,154 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:40,154 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-09-11 12:07:40,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:40,861 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-09-11 12:07:40,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:07:40,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:40,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:40,863 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:07:40,863 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 12:07:40,864 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 [2020-09-11 12:07:40,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 12:07:40,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-09-11 12:07:40,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:07:40,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-09-11 12:07:40,866 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-09-11 12:07:40,867 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:40,867 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-09-11 12:07:40,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:40,867 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-09-11 12:07:40,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:40,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:40,868 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:41,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:41,077 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:41,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:41,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-09-11 12:07:41,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:41,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [136637964] [2020-09-11 12:07:41,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:41,087 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:41,215 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:41,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [136637964] [2020-09-11 12:07:41,216 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1506387714] [2020-09-11 12:07:41,216 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 [2020-09-11 12:07:41,271 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:41,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:41,272 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:41,300 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:41,301 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:41,301 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-09-11 12:07:41,301 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1541395458] [2020-09-11 12:07:41,301 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-09-11 12:07:41,302 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:41,302 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-09-11 12:07:41,302 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-09-11 12:07:41,302 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-09-11 12:07:41,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:41,906 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-09-11 12:07:41,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:07:41,906 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-09-11 12:07:41,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:41,908 INFO L225 Difference]: With dead ends: 112 [2020-09-11 12:07:41,908 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 12:07:41,908 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 [2020-09-11 12:07:41,909 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 12:07:41,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-09-11 12:07:41,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:07:41,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-09-11 12:07:41,911 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-09-11 12:07:41,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:41,911 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-09-11 12:07:41,911 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-09-11 12:07:41,912 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-09-11 12:07:41,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-09-11 12:07:41,912 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:41,912 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:42,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:42,115 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:42,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:42,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-09-11 12:07:42,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:42,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1788642005] [2020-09-11 12:07:42,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:42,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:42,254 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:42,254 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1788642005] [2020-09-11 12:07:42,255 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [450323946] [2020-09-11 12:07:42,255 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 [2020-09-11 12:07:42,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:42,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:42,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-09-11 12:07:42,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:42,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:42,367 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:42,367 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:42,367 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-09-11 12:07:42,367 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1004702826] [2020-09-11 12:07:42,368 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:42,368 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:42,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:42,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:42,368 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-09-11 12:07:43,036 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:43,036 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-09-11 12:07:43,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:07:43,037 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-09-11 12:07:43,037 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:43,038 INFO L225 Difference]: With dead ends: 93 [2020-09-11 12:07:43,038 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:07:43,038 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 [2020-09-11 12:07:43,039 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:07:43,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-09-11 12:07:43,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 12:07:43,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-09-11 12:07:43,041 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-09-11 12:07:43,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:43,042 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-09-11 12:07:43,042 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:43,042 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-09-11 12:07:43,042 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:43,042 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:43,042 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:43,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:43,251 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:43,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:43,252 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-09-11 12:07:43,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:43,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573685718] [2020-09-11 12:07:43,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:43,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:43,469 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573685718] [2020-09-11 12:07:43,470 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [114114258] [2020-09-11 12:07:43,470 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 [2020-09-11 12:07:43,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:43,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:43,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:43,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:43,544 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:43,545 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:43,545 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:43,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499911104] [2020-09-11 12:07:43,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:43,546 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:43,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:43,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:43,546 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-09-11 12:07:43,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:43,853 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-09-11 12:07:43,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:43,854 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:43,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:43,855 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:07:43,855 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:07:43,856 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-09-11 12:07:43,856 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:07:43,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-09-11 12:07:43,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:43,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:43,859 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:43,859 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:43,859 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:43,859 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:43,859 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:43,860 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:43,860 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:43,860 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:44,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:44,070 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:44,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:44,071 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-09-11 12:07:44,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:44,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723935354] [2020-09-11 12:07:44,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:44,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:44,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:44,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723935354] [2020-09-11 12:07:44,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1410859463] [2020-09-11 12:07:44,275 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 [2020-09-11 12:07:44,332 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:44,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:44,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:44,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:44,360 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:44,373 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:44,374 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:44,374 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:44,374 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [441074423] [2020-09-11 12:07:44,374 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:44,374 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:44,375 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:44,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:44,375 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:44,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:44,840 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-09-11 12:07:44,841 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:07:44,841 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:44,841 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:44,842 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:07:44,842 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 12:07:44,843 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 [2020-09-11 12:07:44,843 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 12:07:44,844 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-09-11 12:07:44,844 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:44,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:44,845 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:44,845 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:44,845 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:44,845 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:44,845 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:44,845 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:44,845 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:44,846 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:45,054 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:45,055 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:45,055 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:45,055 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-09-11 12:07:45,056 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:45,056 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908097233] [2020-09-11 12:07:45,056 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:45,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:45,266 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:45,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908097233] [2020-09-11 12:07:45,267 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1293163231] [2020-09-11 12:07:45,267 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 [2020-09-11 12:07:45,328 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 12:07:45,329 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:45,330 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:45,331 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:45,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:45,348 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:45,348 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:45,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [525401409] [2020-09-11 12:07:45,349 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:45,349 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:45,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:45,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:45,349 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:45,781 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:45,782 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-09-11 12:07:45,782 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:07:45,782 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:45,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:45,783 INFO L225 Difference]: With dead ends: 98 [2020-09-11 12:07:45,783 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 12:07:45,784 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 [2020-09-11 12:07:45,784 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 12:07:45,786 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-09-11 12:07:45,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:45,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:45,787 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:45,787 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:45,787 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:45,787 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:45,787 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:45,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:45,788 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:45,788 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:45,990 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:45,990 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:45,991 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:45,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-09-11 12:07:45,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:45,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [608671474] [2020-09-11 12:07:45,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:46,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:46,176 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:46,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [608671474] [2020-09-11 12:07:46,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2023359173] [2020-09-11 12:07:46,176 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 [2020-09-11 12:07:46,238 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 12:07:46,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:46,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:46,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:46,271 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:46,283 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:46,284 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:46,284 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:46,284 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115797271] [2020-09-11 12:07:46,284 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:46,284 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:46,285 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:46,285 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:46,285 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:46,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:46,855 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-09-11 12:07:46,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:07:46,856 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:46,856 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:46,857 INFO L225 Difference]: With dead ends: 97 [2020-09-11 12:07:46,857 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 12:07:46,858 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 [2020-09-11 12:07:46,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 12:07:46,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-09-11 12:07:46,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:46,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:46,862 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:46,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:46,862 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:46,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:46,862 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:46,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:46,864 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:46,864 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:47,068 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:47,068 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:47,069 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:47,069 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-09-11 12:07:47,069 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:47,070 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1134536593] [2020-09-11 12:07:47,070 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:47,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:47,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:47,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1134536593] [2020-09-11 12:07:47,277 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [300447925] [2020-09-11 12:07:47,277 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 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 [2020-09-11 12:07:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:47,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:47,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:47,351 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:47,351 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:47,351 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:47,351 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784825502] [2020-09-11 12:07:47,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:47,352 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:47,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:47,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:47,352 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:47,852 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:47,853 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-09-11 12:07:47,853 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:07:47,853 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:47,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:47,854 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:07:47,854 INFO L226 Difference]: Without dead ends: 88 [2020-09-11 12:07:47,855 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-09-11 12:07:47,855 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-09-11 12:07:47,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-09-11 12:07:47,857 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:47,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:47,857 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:47,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:47,857 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:47,858 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:47,858 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:47,858 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:47,858 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:47,858 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:48,065 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-09-11 12:07:48,066 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:48,066 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:48,066 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-09-11 12:07:48,067 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:48,067 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790337251] [2020-09-11 12:07:48,067 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:48,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:48,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:48,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790337251] [2020-09-11 12:07:48,243 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [845357740] [2020-09-11 12:07:48,243 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 [2020-09-11 12:07:48,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:48,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:48,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:48,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:48,330 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:48,343 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:48,343 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:48,343 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:48,343 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030248552] [2020-09-11 12:07:48,344 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:48,344 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:48,344 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:48,344 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:48,344 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:49,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:49,008 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-09-11 12:07:49,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:07:49,009 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:49,009 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:49,010 INFO L225 Difference]: With dead ends: 93 [2020-09-11 12:07:49,010 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 12:07:49,011 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 [2020-09-11 12:07:49,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 12:07:49,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-09-11 12:07:49,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:49,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:49,013 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:49,013 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:49,014 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:49,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:49,014 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:49,014 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:49,014 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:49,014 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:49,223 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:49,223 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:49,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:49,224 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-09-11 12:07:49,224 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:49,225 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215851244] [2020-09-11 12:07:49,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:49,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:49,416 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:49,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215851244] [2020-09-11 12:07:49,417 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350700523] [2020-09-11 12:07:49,417 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 [2020-09-11 12:07:49,474 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:49,474 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:49,475 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:49,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:49,503 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:49,503 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:49,503 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:49,503 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767412] [2020-09-11 12:07:49,504 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:49,504 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:49,504 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:49,504 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:49,504 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:50,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:50,060 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-09-11 12:07:50,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:07:50,061 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:50,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:50,062 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:07:50,062 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 12:07:50,063 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 [2020-09-11 12:07:50,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 12:07:50,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-09-11 12:07:50,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:50,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:50,067 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:50,067 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:50,067 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:50,067 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:50,067 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:50,067 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:50,067 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:50,067 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:50,268 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-09-11 12:07:50,268 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:50,269 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:50,269 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-09-11 12:07:50,269 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:50,270 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [907983551] [2020-09-11 12:07:50,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:50,279 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:50,459 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:50,459 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [907983551] [2020-09-11 12:07:50,460 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1862217455] [2020-09-11 12:07:50,460 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 [2020-09-11 12:07:50,518 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:50,518 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:50,519 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:50,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:50,542 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:50,558 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:50,558 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:50,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:50,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1380145785] [2020-09-11 12:07:50,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:50,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:50,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:50,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:50,560 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:51,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:51,297 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-09-11 12:07:51,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:07:51,298 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:51,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:51,300 INFO L225 Difference]: With dead ends: 89 [2020-09-11 12:07:51,300 INFO L226 Difference]: Without dead ends: 83 [2020-09-11 12:07:51,300 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 [2020-09-11 12:07:51,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-09-11 12:07:51,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-09-11 12:07:51,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:51,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:51,303 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:51,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:51,303 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:51,303 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:51,304 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:51,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:51,304 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:51,304 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:51,510 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:51,510 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:51,511 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:51,511 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-09-11 12:07:51,511 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:51,511 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467924041] [2020-09-11 12:07:51,512 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:51,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:51,694 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:51,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467924041] [2020-09-11 12:07:51,695 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [603278193] [2020-09-11 12:07:51,695 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 [2020-09-11 12:07:51,746 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-09-11 12:07:51,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:51,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:51,748 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:51,783 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:51,783 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:51,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713358221] [2020-09-11 12:07:51,784 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:51,784 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:51,785 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:52,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:52,372 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-09-11 12:07:52,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:07:52,372 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:52,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:52,374 INFO L225 Difference]: With dead ends: 86 [2020-09-11 12:07:52,374 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:07:52,374 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 [2020-09-11 12:07:52,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:07:52,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-09-11 12:07:52,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:07:52,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:07:52,379 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-09-11 12:07:52,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:52,379 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:07:52,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:52,379 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:07:52,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:52,380 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:52,380 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:52,588 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:52,589 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:52,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:52,589 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-09-11 12:07:52,589 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:52,590 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1269118467] [2020-09-11 12:07:52,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:52,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:52,786 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:52,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1269118467] [2020-09-11 12:07:52,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [611853422] [2020-09-11 12:07:52,787 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 [2020-09-11 12:07:52,847 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-09-11 12:07:52,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:52,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:52,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:52,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:52,889 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:52,889 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:52,890 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:52,890 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [696540351] [2020-09-11 12:07:52,890 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:52,890 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:52,890 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:52,890 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:52,891 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-09-11 12:07:53,729 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:53,729 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-09-11 12:07:53,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:07:53,730 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:53,730 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:53,731 INFO L225 Difference]: With dead ends: 85 [2020-09-11 12:07:53,731 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 12:07:53,731 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 [2020-09-11 12:07:53,732 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 12:07:53,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-09-11 12:07:53,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:07:53,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:07:53,733 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-09-11 12:07:53,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:53,734 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:07:53,734 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:53,734 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:07:53,734 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:53,734 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:53,734 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:53,935 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:53,935 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:53,936 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-09-11 12:07:53,936 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:53,936 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873690557] [2020-09-11 12:07:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:53,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:54,114 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:54,114 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873690557] [2020-09-11 12:07:54,115 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [615859612] [2020-09-11 12:07:54,115 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 [2020-09-11 12:07:54,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:54,173 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:54,174 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:54,198 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:54,198 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:54,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-09-11 12:07:54,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [353027611] [2020-09-11 12:07:54,199 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-09-11 12:07:54,199 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:54,199 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-09-11 12:07:54,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-09-11 12:07:54,200 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-09-11 12:07:54,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:54,862 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 12:07:54,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:07:54,862 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-09-11 12:07:54,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:54,863 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:07:54,864 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 12:07:54,864 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 [2020-09-11 12:07:54,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 12:07:54,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-09-11 12:07:54,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 12:07:54,867 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-09-11 12:07:54,867 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-09-11 12:07:54,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:54,868 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-09-11 12:07:54,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-09-11 12:07:54,868 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-09-11 12:07:54,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:54,868 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:54,868 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:55,069 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:55,069 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:55,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:55,070 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-09-11 12:07:55,070 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:55,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [823363789] [2020-09-11 12:07:55,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:55,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:55,242 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:55,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [823363789] [2020-09-11 12:07:55,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [508343219] [2020-09-11 12:07:55,243 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 [2020-09-11 12:07:55,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:07:55,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:55,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:55,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:55,333 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:07:55,348 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:55,349 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:55,349 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:55,349 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [56347993] [2020-09-11 12:07:55,350 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:55,350 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:55,350 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:55,350 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:55,350 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-09-11 12:07:56,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:56,246 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-09-11 12:07:56,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:07:56,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:56,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:56,248 INFO L225 Difference]: With dead ends: 82 [2020-09-11 12:07:56,248 INFO L226 Difference]: Without dead ends: 74 [2020-09-11 12:07:56,248 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 [2020-09-11 12:07:56,249 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-09-11 12:07:56,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-09-11 12:07:56,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-09-11 12:07:56,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-09-11 12:07:56,250 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-09-11 12:07:56,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:56,251 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-09-11 12:07:56,251 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:56,251 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-09-11 12:07:56,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-09-11 12:07:56,251 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:56,251 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:56,460 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:56,460 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:56,460 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:56,461 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-09-11 12:07:56,461 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:56,461 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1939596750] [2020-09-11 12:07:56,461 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:56,470 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:56,641 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:56,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1939596750] [2020-09-11 12:07:56,642 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1434546656] [2020-09-11 12:07:56,642 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 [2020-09-11 12:07:56,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-09-11 12:07:56,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:56,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-09-11 12:07:56,706 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:56,732 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:56,749 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:56,749 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:56,750 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-09-11 12:07:56,750 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647531148] [2020-09-11 12:07:56,750 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:56,750 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:56,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:56,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:56,751 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-09-11 12:07:57,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:57,535 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 12:07:57,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:07:57,536 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-09-11 12:07:57,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:57,537 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:07:57,537 INFO L226 Difference]: Without dead ends: 87 [2020-09-11 12:07:57,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:07:57,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-09-11 12:07:57,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-09-11 12:07:57,540 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:07:57,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 12:07:57,541 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-09-11 12:07:57,541 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:57,541 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 12:07:57,541 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:57,541 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 12:07:57,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:07:57,542 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:57,542 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:57,750 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:07:57,750 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:57,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:57,751 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-09-11 12:07:57,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:57,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2084032595] [2020-09-11 12:07:57,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:57,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:57,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2084032595] [2020-09-11 12:07:57,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2095153296] [2020-09-11 12:07:57,920 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 [2020-09-11 12:07:57,976 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:07:57,977 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:57,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:07:57,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:58,007 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:07:58,027 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:58,027 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:58,027 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:07:58,027 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276766551] [2020-09-11 12:07:58,028 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:07:58,028 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:58,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:07:58,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:07:58,029 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-09-11 12:07:58,909 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:58,910 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-09-11 12:07:58,910 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:07:58,911 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:07:58,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:58,912 INFO L225 Difference]: With dead ends: 78 [2020-09-11 12:07:58,912 INFO L226 Difference]: Without dead ends: 73 [2020-09-11 12:07:58,913 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 [2020-09-11 12:07:58,913 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-09-11 12:07:58,914 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-09-11 12:07:58,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-09-11 12:07:58,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-09-11 12:07:58,914 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-09-11 12:07:58,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:58,915 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-09-11 12:07:58,915 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:07:58,915 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-09-11 12:07:58,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:07:58,915 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:58,915 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:07:59,120 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-09-11 12:07:59,121 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:07:59,121 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:07:59,121 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-09-11 12:07:59,121 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:07:59,122 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763863786] [2020-09-11 12:07:59,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:07:59,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:07:59,381 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:59,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763863786] [2020-09-11 12:07:59,382 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33487861] [2020-09-11 12:07:59,382 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 [2020-09-11 12:07:59,442 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:07:59,442 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:07:59,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:07:59,444 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:07:59,455 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:07:59,456 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:07:59,456 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:07:59,456 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504895504] [2020-09-11 12:07:59,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:07:59,457 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:07:59,457 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:07:59,457 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:07:59,457 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-09-11 12:07:59,842 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:07:59,842 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-09-11 12:07:59,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-09-11 12:07:59,843 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:07:59,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:07:59,844 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:07:59,844 INFO L226 Difference]: Without dead ends: 78 [2020-09-11 12:07:59,844 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 [2020-09-11 12:07:59,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-09-11 12:07:59,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-09-11 12:07:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:07:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-09-11 12:07:59,846 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-09-11 12:07:59,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:07:59,847 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-09-11 12:07:59,847 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:07:59,847 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-09-11 12:07:59,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:07:59,847 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:07:59,847 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:00,048 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:00,048 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:00,049 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:00,049 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-09-11 12:08:00,049 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:00,049 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1484575546] [2020-09-11 12:08:00,050 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:00,058 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:00,310 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:00,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1484575546] [2020-09-11 12:08:00,311 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1792054091] [2020-09-11 12:08:00,311 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 [2020-09-11 12:08:00,371 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:00,371 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:00,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:00,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:00,395 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:00,410 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:00,411 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:00,411 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:00,411 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1926905373] [2020-09-11 12:08:00,411 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:00,411 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:00,412 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:00,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:00,412 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-09-11 12:08:00,795 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:00,796 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-09-11 12:08:00,796 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-09-11 12:08:00,796 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:00,797 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:00,797 INFO L225 Difference]: With dead ends: 98 [2020-09-11 12:08:00,797 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 12:08:00,798 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 [2020-09-11 12:08:00,798 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 12:08:00,799 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-09-11 12:08:00,800 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-09-11 12:08:00,800 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-09-11 12:08:00,800 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-09-11 12:08:00,800 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:00,801 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-09-11 12:08:00,801 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:00,801 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-09-11 12:08:00,801 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:00,801 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:00,801 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:01,002 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-09-11 12:08:01,002 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:01,003 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:01,003 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-09-11 12:08:01,003 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:01,004 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424350333] [2020-09-11 12:08:01,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:01,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:01,262 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:01,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424350333] [2020-09-11 12:08:01,262 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [249153221] [2020-09-11 12:08:01,263 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 [2020-09-11 12:08:01,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:01,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:01,322 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:01,336 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:01,336 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:01,336 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:01,337 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798303440] [2020-09-11 12:08:01,337 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:01,337 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:01,337 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:01,337 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:01,338 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-09-11 12:08:01,786 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:01,786 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-09-11 12:08:01,787 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:08:01,787 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:01,787 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:01,788 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:08:01,788 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:08:01,789 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 [2020-09-11 12:08:01,789 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:08:01,790 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-09-11 12:08:01,791 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-09-11 12:08:01,791 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-09-11 12:08:01,791 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-09-11 12:08:01,791 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:01,791 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-09-11 12:08:01,791 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:01,792 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-09-11 12:08:01,792 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:01,792 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:01,792 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:02,000 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:02,000 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:02,001 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:02,001 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-09-11 12:08:02,002 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:02,003 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1790463920] [2020-09-11 12:08:02,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:02,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:02,282 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:02,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1790463920] [2020-09-11 12:08:02,282 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [947598645] [2020-09-11 12:08:02,283 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 [2020-09-11 12:08:02,366 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:02,366 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:02,368 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:02,369 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:02,394 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:02,406 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:02,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:02,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:02,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1309975322] [2020-09-11 12:08:02,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:02,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:02,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:02,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:02,408 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-09-11 12:08:02,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:02,863 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-09-11 12:08:02,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:08:02,863 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:02,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:02,865 INFO L225 Difference]: With dead ends: 109 [2020-09-11 12:08:02,865 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 12:08:02,865 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-09-11 12:08:02,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 12:08:02,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-09-11 12:08:02,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:08:02,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-09-11 12:08:02,868 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-09-11 12:08:02,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:02,868 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-09-11 12:08:02,868 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:02,868 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-09-11 12:08:02,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:02,869 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:02,869 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:03,077 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:03,077 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:03,078 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:03,078 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-09-11 12:08:03,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:03,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1523970237] [2020-09-11 12:08:03,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:03,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:03,312 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:03,312 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1523970237] [2020-09-11 12:08:03,313 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789092089] [2020-09-11 12:08:03,313 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 [2020-09-11 12:08:03,377 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:03,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:03,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:03,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:03,393 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:03,393 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:03,394 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:03,394 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263307447] [2020-09-11 12:08:03,394 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:03,394 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:03,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:03,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:03,395 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-09-11 12:08:03,949 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:03,950 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-09-11 12:08:03,950 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:08:03,951 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:03,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:03,952 INFO L225 Difference]: With dead ends: 109 [2020-09-11 12:08:03,952 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 12:08:03,953 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 [2020-09-11 12:08:03,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 12:08:03,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-09-11 12:08:03,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 12:08:03,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-09-11 12:08:03,956 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-09-11 12:08:03,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:03,956 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-09-11 12:08:03,956 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:03,956 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-09-11 12:08:03,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:03,957 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:03,957 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:04,162 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-09-11 12:08:04,163 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:04,163 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:04,163 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-09-11 12:08:04,163 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:04,164 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36434386] [2020-09-11 12:08:04,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:04,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:04,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:04,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36434386] [2020-09-11 12:08:04,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [257882972] [2020-09-11 12:08:04,405 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 [2020-09-11 12:08:04,459 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:04,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:04,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:04,461 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:04,498 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:04,509 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:04,510 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:04,510 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:04,510 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [790310641] [2020-09-11 12:08:04,510 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:04,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:04,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:04,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:04,511 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-09-11 12:08:05,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:05,174 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-09-11 12:08:05,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:08:05,174 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:05,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:05,175 INFO L225 Difference]: With dead ends: 106 [2020-09-11 12:08:05,176 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:08:05,176 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 [2020-09-11 12:08:05,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:08:05,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 12:08:05,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:08:05,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-09-11 12:08:05,179 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-09-11 12:08:05,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:05,179 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-09-11 12:08:05,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:05,179 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-09-11 12:08:05,180 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:05,180 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:05,180 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:05,391 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-09-11 12:08:05,391 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:05,392 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:05,392 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-09-11 12:08:05,392 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:05,392 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047940843] [2020-09-11 12:08:05,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:05,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:05,623 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:05,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047940843] [2020-09-11 12:08:05,624 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1570903374] [2020-09-11 12:08:05,624 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 [2020-09-11 12:08:05,689 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:08:05,690 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:05,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:05,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:05,708 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:05,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:05,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:05,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1068669530] [2020-09-11 12:08:05,709 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:05,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:05,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:05,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:05,710 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-09-11 12:08:06,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:06,291 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-09-11 12:08:06,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:08:06,292 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:06,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:06,293 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:08:06,293 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:06,293 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 [2020-09-11 12:08:06,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:06,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 12:08:06,297 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 12:08:06,297 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-09-11 12:08:06,297 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-09-11 12:08:06,297 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:06,298 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-09-11 12:08:06,298 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:06,298 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-09-11 12:08:06,298 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:06,298 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:06,298 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:06,506 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:06,506 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:06,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:06,507 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-09-11 12:08:06,507 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:06,508 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953161089] [2020-09-11 12:08:06,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:06,519 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:06,732 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:06,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953161089] [2020-09-11 12:08:06,732 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1588763314] [2020-09-11 12:08:06,733 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 [2020-09-11 12:08:06,796 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:06,796 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:06,797 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:06,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:06,822 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:06,834 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:06,835 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:06,835 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:06,835 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [918238392] [2020-09-11 12:08:06,835 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:06,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:06,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:06,836 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:06,836 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-09-11 12:08:07,579 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:07,579 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-09-11 12:08:07,580 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:08:07,580 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:07,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:07,581 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:08:07,581 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:08:07,581 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 [2020-09-11 12:08:07,582 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:08:07,584 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-09-11 12:08:07,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:08:07,584 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-09-11 12:08:07,584 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-09-11 12:08:07,585 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:07,585 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-09-11 12:08:07,585 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:07,585 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-09-11 12:08:07,585 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:07,585 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:07,585 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:07,788 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-09-11 12:08:07,789 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:07,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:07,790 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-09-11 12:08:07,790 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:07,790 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246165254] [2020-09-11 12:08:07,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:07,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:08,001 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:08,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246165254] [2020-09-11 12:08:08,002 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161556495] [2020-09-11 12:08:08,002 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 [2020-09-11 12:08:08,060 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:08,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:08,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:08,085 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:08,085 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:08,085 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:08,085 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990850262] [2020-09-11 12:08:08,085 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:08,086 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:08,086 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:08,086 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:08,086 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-09-11 12:08:08,754 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:08,754 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-09-11 12:08:08,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:08:08,755 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:08,755 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:08,756 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:08:08,756 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 12:08:08,757 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 [2020-09-11 12:08:08,758 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 12:08:08,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-09-11 12:08:08,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:08:08,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-09-11 12:08:08,760 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-09-11 12:08:08,760 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:08,761 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-09-11 12:08:08,761 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:08,761 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-09-11 12:08:08,761 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:08,761 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:08,761 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:08,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:08,966 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:08,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:08,966 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-09-11 12:08:08,966 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:08,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [854231116] [2020-09-11 12:08:08,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:08,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:09,164 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:09,164 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [854231116] [2020-09-11 12:08:09,165 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [610764224] [2020-09-11 12:08:09,165 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 [2020-09-11 12:08:09,223 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:09,223 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:09,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:09,225 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:09,250 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:09,266 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:09,266 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:09,266 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:09,267 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1670516617] [2020-09-11 12:08:09,267 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:09,267 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:09,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:09,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:09,267 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-09-11 12:08:10,100 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:10,101 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-09-11 12:08:10,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:08:10,102 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:10,102 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:10,102 INFO L225 Difference]: With dead ends: 102 [2020-09-11 12:08:10,103 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:08:10,103 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 [2020-09-11 12:08:10,103 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:08:10,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-09-11 12:08:10,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:08:10,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-09-11 12:08:10,105 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-09-11 12:08:10,105 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:10,105 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-09-11 12:08:10,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:10,105 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-09-11 12:08:10,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:10,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:10,105 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:10,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-09-11 12:08:10,306 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:10,307 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:10,307 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-09-11 12:08:10,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:10,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297086369] [2020-09-11 12:08:10,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:10,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:10,515 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:10,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297086369] [2020-09-11 12:08:10,516 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [813995238] [2020-09-11 12:08:10,516 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 [2020-09-11 12:08:10,579 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:10,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:10,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:10,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:10,599 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:10,600 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:10,600 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:10,600 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602645432] [2020-09-11 12:08:10,601 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:10,601 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:10,601 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:10,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:10,601 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-09-11 12:08:11,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:11,328 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-09-11 12:08:11,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:08:11,329 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:11,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:11,330 INFO L225 Difference]: With dead ends: 103 [2020-09-11 12:08:11,330 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 12:08:11,331 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:08:11,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 12:08:11,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-09-11 12:08:11,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:08:11,333 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-09-11 12:08:11,333 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-09-11 12:08:11,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:11,333 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-09-11 12:08:11,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:11,333 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-09-11 12:08:11,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:11,334 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:11,334 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:11,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:11,536 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:11,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:11,536 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-09-11 12:08:11,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:11,537 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740972314] [2020-09-11 12:08:11,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:11,546 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:11,747 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:11,747 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740972314] [2020-09-11 12:08:11,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1414622624] [2020-09-11 12:08:11,748 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 [2020-09-11 12:08:11,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:11,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:11,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:11,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:11,833 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:11,849 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:11,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:11,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:11,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1089957514] [2020-09-11 12:08:11,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:11,850 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:11,850 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:11,850 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:11,851 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-09-11 12:08:12,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:12,777 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-09-11 12:08:12,778 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:08:12,778 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:12,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:12,778 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:08:12,779 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 12:08:12,779 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 [2020-09-11 12:08:12,780 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 12:08:12,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-09-11 12:08:12,782 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:08:12,782 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-09-11 12:08:12,782 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-09-11 12:08:12,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:12,782 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-09-11 12:08:12,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:12,782 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-09-11 12:08:12,783 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:12,783 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:12,783 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:12,993 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-09-11 12:08:12,993 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:12,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:12,994 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-09-11 12:08:12,994 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:12,995 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536116863] [2020-09-11 12:08:12,995 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:13,005 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:13,197 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:13,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536116863] [2020-09-11 12:08:13,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [217954485] [2020-09-11 12:08:13,197 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 [2020-09-11 12:08:13,259 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:08:13,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:13,260 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:13,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:13,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:13,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:13,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-09-11 12:08:13,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [456177365] [2020-09-11 12:08:13,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-09-11 12:08:13,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:13,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-09-11 12:08:13,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-09-11 12:08:13,289 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-09-11 12:08:14,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:14,072 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 12:08:14,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:14,073 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-09-11 12:08:14,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:14,074 INFO L225 Difference]: With dead ends: 120 [2020-09-11 12:08:14,074 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 12:08:14,075 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 [2020-09-11 12:08:14,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 12:08:14,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-09-11 12:08:14,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:08:14,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-09-11 12:08:14,078 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-09-11 12:08:14,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:14,078 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-09-11 12:08:14,078 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-09-11 12:08:14,078 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-09-11 12:08:14,079 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-09-11 12:08:14,079 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:14,079 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:14,289 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-09-11 12:08:14,289 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:14,289 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:14,290 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-09-11 12:08:14,290 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:14,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [723634665] [2020-09-11 12:08:14,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:14,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:14,465 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:14,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [723634665] [2020-09-11 12:08:14,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913513142] [2020-09-11 12:08:14,466 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 [2020-09-11 12:08:14,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:14,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:14,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-09-11 12:08:14,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:14,551 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:14,566 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:14,566 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:14,566 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-09-11 12:08:14,566 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835876171] [2020-09-11 12:08:14,567 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:14,567 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:14,567 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:14,567 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:14,567 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-09-11 12:08:15,533 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:15,534 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-09-11 12:08:15,534 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:08:15,535 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-09-11 12:08:15,535 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:15,535 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:08:15,535 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:08:15,536 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:08:15,536 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:08:15,537 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-09-11 12:08:15,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 12:08:15,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-09-11 12:08:15,538 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-09-11 12:08:15,538 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:15,539 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-09-11 12:08:15,539 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:15,539 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-09-11 12:08:15,539 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:15,539 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:15,539 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:15,740 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:15,740 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:15,740 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:15,741 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-09-11 12:08:15,741 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:15,741 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914011419] [2020-09-11 12:08:15,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:15,751 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:16,022 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:16,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914011419] [2020-09-11 12:08:16,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1981202994] [2020-09-11 12:08:16,023 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 [2020-09-11 12:08:16,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:16,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:16,083 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:16,095 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:16,095 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:16,095 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:16,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663843227] [2020-09-11 12:08:16,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:16,096 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:16,096 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:16,096 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:16,096 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-09-11 12:08:16,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:16,536 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-09-11 12:08:16,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:08:16,537 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:16,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:16,537 INFO L225 Difference]: With dead ends: 114 [2020-09-11 12:08:16,537 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 12:08:16,538 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 [2020-09-11 12:08:16,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 12:08:16,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-09-11 12:08:16,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:16,539 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:16,540 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:16,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:16,540 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:16,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:16,540 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:16,540 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:16,540 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:16,540 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:16,745 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:16,745 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:16,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:16,746 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-09-11 12:08:16,746 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:16,747 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [272223340] [2020-09-11 12:08:16,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:16,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:17,036 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:17,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [272223340] [2020-09-11 12:08:17,036 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1344472271] [2020-09-11 12:08:17,036 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 [2020-09-11 12:08:17,093 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:17,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:17,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:17,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:17,119 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:17,131 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:17,131 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:17,132 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:17,132 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296583061] [2020-09-11 12:08:17,132 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:17,132 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:17,132 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:17,132 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:17,132 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:17,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:17,709 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-09-11 12:08:17,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:08:17,710 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:17,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:17,711 INFO L225 Difference]: With dead ends: 111 [2020-09-11 12:08:17,711 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:08:17,711 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 [2020-09-11 12:08:17,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:08:17,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-09-11 12:08:17,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:17,713 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:17,713 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:17,713 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:17,713 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:17,713 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:17,714 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:17,714 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:17,714 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:17,714 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:17,914 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-09-11 12:08:17,915 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:17,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:17,915 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-09-11 12:08:17,916 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:17,916 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [771457064] [2020-09-11 12:08:17,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:17,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:18,172 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:18,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [771457064] [2020-09-11 12:08:18,172 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383964466] [2020-09-11 12:08:18,172 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 [2020-09-11 12:08:18,226 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:18,226 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:18,228 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:18,228 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:18,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:18,241 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:18,241 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:18,242 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1055722420] [2020-09-11 12:08:18,242 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:18,242 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:18,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:18,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:18,243 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:18,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:18,783 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-09-11 12:08:18,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:08:18,784 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:18,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:18,784 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:08:18,785 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 12:08:18,785 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 [2020-09-11 12:08:18,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 12:08:18,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-09-11 12:08:18,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:18,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:18,788 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:18,789 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:18,789 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:18,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:18,789 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:18,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:18,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:18,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:18,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:18,995 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:18,996 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-09-11 12:08:18,996 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:18,996 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2010417945] [2020-09-11 12:08:18,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:19,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:19,268 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:19,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2010417945] [2020-09-11 12:08:19,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1768584468] [2020-09-11 12:08:19,269 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 [2020-09-11 12:08:19,324 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:19,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:19,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:19,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:19,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:19,378 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:19,378 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:19,378 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:19,378 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604128635] [2020-09-11 12:08:19,379 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:19,379 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:19,379 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:19,379 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:19,379 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:19,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:19,984 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-09-11 12:08:19,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:08:19,985 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:19,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:19,986 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:08:19,986 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:19,986 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-09-11 12:08:19,986 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:19,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-09-11 12:08:19,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:19,988 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:19,989 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:19,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:19,991 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:19,991 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:19,991 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:19,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:19,992 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:19,992 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:20,199 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-09-11 12:08:20,199 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:20,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:20,200 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-09-11 12:08:20,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:20,201 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1257854188] [2020-09-11 12:08:20,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:20,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:20,456 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:20,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1257854188] [2020-09-11 12:08:20,456 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1093477707] [2020-09-11 12:08:20,457 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 [2020-09-11 12:08:20,519 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:08:20,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:20,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:20,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:20,538 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:20,538 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:20,538 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:20,538 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917867941] [2020-09-11 12:08:20,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:20,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:20,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:20,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:20,539 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:21,139 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:21,139 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-09-11 12:08:21,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:08:21,140 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:21,140 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:21,141 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:08:21,141 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:08:21,141 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 [2020-09-11 12:08:21,142 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:08:21,143 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-09-11 12:08:21,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:21,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:21,144 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:21,144 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:21,145 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:21,145 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:21,145 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:21,145 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:21,145 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:21,145 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:21,347 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-09-11 12:08:21,347 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:21,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:21,348 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-09-11 12:08:21,348 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:21,348 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1585346975] [2020-09-11 12:08:21,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:21,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:21,604 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:21,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1585346975] [2020-09-11 12:08:21,605 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941270254] [2020-09-11 12:08:21,605 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 [2020-09-11 12:08:21,668 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:21,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:21,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:21,669 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:21,696 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:21,711 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:21,711 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:21,711 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:21,711 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1849395714] [2020-09-11 12:08:21,712 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:21,712 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:21,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:21,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:21,712 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:22,485 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:22,486 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-09-11 12:08:22,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:08:22,487 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:22,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:22,488 INFO L225 Difference]: With dead ends: 103 [2020-09-11 12:08:22,488 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 12:08:22,488 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 [2020-09-11 12:08:22,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 12:08:22,490 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-09-11 12:08:22,490 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:22,490 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:22,490 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:22,491 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:22,491 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:22,491 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:22,491 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:22,491 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:22,491 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:22,491 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:22,698 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-09-11 12:08:22,698 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:22,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:22,699 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-09-11 12:08:22,699 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:22,699 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1748334700] [2020-09-11 12:08:22,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:22,711 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:22,929 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:22,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1748334700] [2020-09-11 12:08:22,930 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1788295284] [2020-09-11 12:08:22,930 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 [2020-09-11 12:08:22,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:22,990 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:22,991 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:23,010 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:23,010 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:23,010 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:23,011 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138749319] [2020-09-11 12:08:23,011 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:23,011 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:23,011 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:23,012 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:23,012 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:23,684 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:23,685 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-09-11 12:08:23,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:08:23,685 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:23,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:23,686 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:08:23,686 INFO L226 Difference]: Without dead ends: 94 [2020-09-11 12:08:23,686 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 [2020-09-11 12:08:23,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-09-11 12:08:23,687 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-09-11 12:08:23,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:23,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:23,688 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:23,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:23,688 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:23,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:23,688 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:23,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:23,689 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:23,689 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:23,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:23,889 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:23,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:23,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-09-11 12:08:23,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:23,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906424430] [2020-09-11 12:08:23,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:23,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:24,132 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:24,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906424430] [2020-09-11 12:08:24,133 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353137108] [2020-09-11 12:08:24,133 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 [2020-09-11 12:08:24,194 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:24,194 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:24,195 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:24,196 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:24,221 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:24,237 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:24,237 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:24,237 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:24,237 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890338669] [2020-09-11 12:08:24,238 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:24,238 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:24,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:24,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:24,238 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:25,111 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:25,111 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-09-11 12:08:25,112 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:08:25,112 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:25,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:25,113 INFO L225 Difference]: With dead ends: 99 [2020-09-11 12:08:25,113 INFO L226 Difference]: Without dead ends: 93 [2020-09-11 12:08:25,113 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 [2020-09-11 12:08:25,114 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-09-11 12:08:25,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-09-11 12:08:25,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:25,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:25,115 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:25,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:25,115 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:25,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:25,115 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:25,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:25,116 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:25,116 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:25,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-09-11 12:08:25,317 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:25,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:25,317 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-09-11 12:08:25,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:25,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018787425] [2020-09-11 12:08:25,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:25,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:25,544 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:25,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018787425] [2020-09-11 12:08:25,544 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2017605673] [2020-09-11 12:08:25,545 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 [2020-09-11 12:08:25,606 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:25,606 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:25,607 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:25,608 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:25,629 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:25,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:25,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:25,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997602004] [2020-09-11 12:08:25,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:25,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:25,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:25,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:25,631 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:26,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:26,360 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-09-11 12:08:26,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:08:26,361 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:26,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:26,362 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:08:26,362 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:08:26,363 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 [2020-09-11 12:08:26,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:08:26,364 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-09-11 12:08:26,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:26,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:26,365 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:26,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:26,365 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:26,365 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:26,366 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:26,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:26,366 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:26,366 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:26,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:26,568 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:26,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:26,569 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-09-11 12:08:26,569 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:26,569 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [602414227] [2020-09-11 12:08:26,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:26,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [602414227] [2020-09-11 12:08:26,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186188204] [2020-09-11 12:08:26,807 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 [2020-09-11 12:08:26,867 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:26,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:26,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:26,868 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:26,894 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:26,910 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:26,910 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:26,911 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:26,911 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1995991257] [2020-09-11 12:08:26,911 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:26,911 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:26,911 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:26,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:26,912 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:27,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:27,898 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-09-11 12:08:27,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:08:27,898 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:27,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:27,899 INFO L225 Difference]: With dead ends: 95 [2020-09-11 12:08:27,899 INFO L226 Difference]: Without dead ends: 89 [2020-09-11 12:08:27,900 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 [2020-09-11 12:08:27,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-09-11 12:08:27,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-09-11 12:08:27,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:27,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:27,902 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:27,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:27,902 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:27,902 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:27,902 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:27,902 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:27,903 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:27,903 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:28,103 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:28,104 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:28,104 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:28,104 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-09-11 12:08:28,105 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:28,105 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248869017] [2020-09-11 12:08:28,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:28,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:28,329 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:28,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248869017] [2020-09-11 12:08:28,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [733269493] [2020-09-11 12:08:28,329 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 [2020-09-11 12:08:28,396 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-09-11 12:08:28,397 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:28,398 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:28,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:28,418 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:28,418 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:28,418 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:28,419 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [669817032] [2020-09-11 12:08:28,419 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:28,419 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:28,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:28,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:28,420 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:29,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:29,231 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-09-11 12:08:29,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:08:29,232 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:29,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:29,233 INFO L225 Difference]: With dead ends: 92 [2020-09-11 12:08:29,233 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 12:08:29,233 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 [2020-09-11 12:08:29,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 12:08:29,235 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-09-11 12:08:29,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:29,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:29,236 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-09-11 12:08:29,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:29,237 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:29,237 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:29,237 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:29,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:29,237 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:29,237 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:29,444 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:29,445 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:29,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:29,445 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-09-11 12:08:29,445 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:29,446 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1175971224] [2020-09-11 12:08:29,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:29,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:29,658 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:29,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1175971224] [2020-09-11 12:08:29,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1911774289] [2020-09-11 12:08:29,659 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 [2020-09-11 12:08:29,724 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-09-11 12:08:29,725 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:29,726 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:29,733 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:29,764 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:29,784 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:29,785 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:29,785 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:29,785 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [834956751] [2020-09-11 12:08:29,786 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:29,786 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:29,786 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:29,787 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:29,787 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-09-11 12:08:30,820 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:30,820 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-09-11 12:08:30,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:08:30,822 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:30,822 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:30,822 INFO L225 Difference]: With dead ends: 91 [2020-09-11 12:08:30,823 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:08:30,823 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 [2020-09-11 12:08:30,824 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:08:30,825 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-09-11 12:08:30,825 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:30,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:30,826 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-09-11 12:08:30,826 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:30,827 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:30,827 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:30,827 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:30,827 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:30,828 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:30,828 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:31,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:31,029 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:31,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:31,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-09-11 12:08:31,029 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:31,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [567686353] [2020-09-11 12:08:31,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:31,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:31,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [567686353] [2020-09-11 12:08:31,260 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872818341] [2020-09-11 12:08:31,260 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 [2020-09-11 12:08:31,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:31,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:31,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:31,354 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:31,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:31,354 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-09-11 12:08:31,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530960920] [2020-09-11 12:08:31,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-09-11 12:08:31,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:31,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-09-11 12:08:31,355 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-09-11 12:08:31,355 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-09-11 12:08:32,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:32,193 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 12:08:32,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:32,194 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-09-11 12:08:32,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:32,195 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:08:32,195 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:32,196 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 [2020-09-11 12:08:32,196 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:32,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-09-11 12:08:32,198 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 12:08:32,198 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-09-11 12:08:32,198 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-09-11 12:08:32,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:32,199 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-09-11 12:08:32,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-09-11 12:08:32,199 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-09-11 12:08:32,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:32,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:32,200 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:32,409 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-09-11 12:08:32,409 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:32,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:32,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-09-11 12:08:32,411 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:32,411 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140377602] [2020-09-11 12:08:32,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:32,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:32,636 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:32,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140377602] [2020-09-11 12:08:32,636 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [236851050] [2020-09-11 12:08:32,636 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 [2020-09-11 12:08:32,698 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:32,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:32,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:32,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:32,726 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:32,752 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:32,752 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:32,752 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:32,753 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429160783] [2020-09-11 12:08:32,753 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:32,753 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:32,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:32,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:32,754 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-09-11 12:08:33,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:33,863 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-09-11 12:08:33,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:08:33,864 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:33,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:33,864 INFO L225 Difference]: With dead ends: 88 [2020-09-11 12:08:33,864 INFO L226 Difference]: Without dead ends: 80 [2020-09-11 12:08:33,864 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 [2020-09-11 12:08:33,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-09-11 12:08:33,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-09-11 12:08:33,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-09-11 12:08:33,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-09-11 12:08:33,866 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-09-11 12:08:33,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:33,866 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-09-11 12:08:33,866 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:33,866 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-09-11 12:08:33,866 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-09-11 12:08:33,866 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:33,867 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:34,067 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-09-11 12:08:34,067 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:34,068 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:34,068 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-09-11 12:08:34,068 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:34,069 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272848232] [2020-09-11 12:08:34,069 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:34,078 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:34,297 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:34,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272848232] [2020-09-11 12:08:34,298 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286118240] [2020-09-11 12:08:34,298 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 [2020-09-11 12:08:34,360 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-09-11 12:08:34,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:34,361 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-09-11 12:08:34,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:34,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:08:34,406 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:34,406 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:34,407 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-09-11 12:08:34,407 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [41516468] [2020-09-11 12:08:34,407 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:34,407 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:34,408 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:34,408 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:34,408 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-09-11 12:08:35,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:35,432 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-09-11 12:08:35,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:35,433 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-09-11 12:08:35,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:35,434 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:08:35,434 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 12:08:35,434 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 [2020-09-11 12:08:35,435 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 12:08:35,436 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-09-11 12:08:35,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:08:35,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 12:08:35,436 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-09-11 12:08:35,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:35,436 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 12:08:35,437 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:35,437 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 12:08:35,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:35,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:35,437 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:35,638 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-09-11 12:08:35,638 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:35,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:35,639 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-09-11 12:08:35,639 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:35,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1206795493] [2020-09-11 12:08:35,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:35,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:35,877 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:35,877 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1206795493] [2020-09-11 12:08:35,878 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1610229333] [2020-09-11 12:08:35,878 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 [2020-09-11 12:08:35,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:35,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:35,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:35,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:35,965 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:08:35,986 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:35,987 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:35,987 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:35,987 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811005957] [2020-09-11 12:08:35,987 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:35,987 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:35,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:35,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:35,988 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-09-11 12:08:37,107 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:37,107 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-09-11 12:08:37,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:37,108 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:37,108 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:37,109 INFO L225 Difference]: With dead ends: 84 [2020-09-11 12:08:37,109 INFO L226 Difference]: Without dead ends: 79 [2020-09-11 12:08:37,110 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 [2020-09-11 12:08:37,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-09-11 12:08:37,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-09-11 12:08:37,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-09-11 12:08:37,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-09-11 12:08:37,112 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-09-11 12:08:37,112 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:37,112 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-09-11 12:08:37,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:37,113 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-09-11 12:08:37,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:37,113 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:37,113 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:37,319 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-09-11 12:08:37,319 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:37,320 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:37,320 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-09-11 12:08:37,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:37,321 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035257561] [2020-09-11 12:08:37,321 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:37,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:37,630 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:37,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035257561] [2020-09-11 12:08:37,631 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [333863680] [2020-09-11 12:08:37,631 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 [2020-09-11 12:08:37,696 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:08:37,697 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:37,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:37,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:37,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:37,709 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:37,709 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:37,709 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1633740684] [2020-09-11 12:08:37,710 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:37,710 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:37,710 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:37,710 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:37,710 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-09-11 12:08:38,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:38,195 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-09-11 12:08:38,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-09-11 12:08:38,196 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:38,196 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:38,197 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:08:38,197 INFO L226 Difference]: Without dead ends: 84 [2020-09-11 12:08:38,197 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-09-11 12:08:38,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-09-11 12:08:38,198 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-09-11 12:08:38,199 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:08:38,199 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-09-11 12:08:38,199 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-09-11 12:08:38,199 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:38,199 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-09-11 12:08:38,199 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:38,200 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-09-11 12:08:38,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:38,200 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:38,200 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:38,403 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:38,403 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:38,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:38,404 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-09-11 12:08:38,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:38,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964687318] [2020-09-11 12:08:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:38,723 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:38,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964687318] [2020-09-11 12:08:38,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [405630539] [2020-09-11 12:08:38,724 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 [2020-09-11 12:08:38,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:08:38,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:38,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:38,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:38,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:38,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:38,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:38,831 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:38,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591271074] [2020-09-11 12:08:38,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:38,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:38,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:38,832 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:38,832 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-09-11 12:08:39,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:39,336 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-09-11 12:08:39,337 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-09-11 12:08:39,337 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:39,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:39,338 INFO L225 Difference]: With dead ends: 106 [2020-09-11 12:08:39,339 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:08:39,339 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 [2020-09-11 12:08:39,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:08:39,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-09-11 12:08:39,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-09-11 12:08:39,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-09-11 12:08:39,342 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-09-11 12:08:39,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:39,342 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-09-11 12:08:39,342 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:39,342 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-09-11 12:08:39,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:39,343 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:39,343 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:39,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-09-11 12:08:39,546 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:39,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:39,546 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-09-11 12:08:39,547 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:39,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1814497341] [2020-09-11 12:08:39,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:39,556 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:39,856 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:39,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1814497341] [2020-09-11 12:08:39,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617958191] [2020-09-11 12:08:39,857 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 [2020-09-11 12:08:39,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:39,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:39,918 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:39,929 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:39,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:39,930 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:39,930 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [82995962] [2020-09-11 12:08:39,930 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:39,930 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:39,931 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:39,931 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:39,931 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-09-11 12:08:40,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:40,502 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-09-11 12:08:40,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:08:40,503 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:40,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:40,504 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:08:40,504 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:40,504 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 [2020-09-11 12:08:40,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:40,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-09-11 12:08:40,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-09-11 12:08:40,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-09-11 12:08:40,507 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-09-11 12:08:40,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:40,508 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-09-11 12:08:40,508 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:40,508 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-09-11 12:08:40,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:40,508 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:40,508 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:40,716 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-09-11 12:08:40,716 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:40,717 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:40,717 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-09-11 12:08:40,717 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:40,717 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032280858] [2020-09-11 12:08:40,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:40,728 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:41,028 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:41,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032280858] [2020-09-11 12:08:41,029 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [798466518] [2020-09-11 12:08:41,029 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 [2020-09-11 12:08:41,091 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:41,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:41,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:41,093 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:41,120 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:41,133 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:41,133 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:41,133 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:41,134 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1621644126] [2020-09-11 12:08:41,134 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:41,134 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:41,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:41,134 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:41,134 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-09-11 12:08:41,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:41,783 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-09-11 12:08:41,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:08:41,784 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:41,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:41,785 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:08:41,785 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:08:41,785 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 [2020-09-11 12:08:41,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:08:41,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-09-11 12:08:41,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:08:41,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-09-11 12:08:41,788 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-09-11 12:08:41,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:41,788 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-09-11 12:08:41,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:41,788 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-09-11 12:08:41,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:41,789 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:41,789 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:41,996 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-09-11 12:08:41,996 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:41,997 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:41,997 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-09-11 12:08:41,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:41,998 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050929787] [2020-09-11 12:08:41,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:42,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:42,292 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:42,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050929787] [2020-09-11 12:08:42,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [648888914] [2020-09-11 12:08:42,293 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 [2020-09-11 12:08:42,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:08:42,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:42,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:42,359 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:42,376 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:42,376 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:42,376 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:42,376 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2134243519] [2020-09-11 12:08:42,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:42,377 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:42,377 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:42,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:42,377 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-09-11 12:08:43,019 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:43,020 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-09-11 12:08:43,020 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:08:43,021 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:43,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:43,021 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:08:43,021 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:08:43,022 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 [2020-09-11 12:08:43,022 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:08:43,023 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-09-11 12:08:43,024 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-09-11 12:08:43,024 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-09-11 12:08:43,024 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-09-11 12:08:43,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:43,024 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-09-11 12:08:43,024 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:43,024 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-09-11 12:08:43,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:43,025 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:43,025 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:43,226 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:43,226 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:43,226 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:43,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-09-11 12:08:43,227 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:43,227 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525373065] [2020-09-11 12:08:43,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:43,242 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:43,512 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:43,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525373065] [2020-09-11 12:08:43,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1260869229] [2020-09-11 12:08:43,513 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 [2020-09-11 12:08:43,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:43,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:43,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:43,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:43,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:43,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:43,620 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:43,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:43,621 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240305789] [2020-09-11 12:08:43,621 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:43,621 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:43,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:43,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:43,622 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-09-11 12:08:44,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:44,367 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-09-11 12:08:44,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:08:44,368 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:44,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:44,368 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:08:44,368 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 12:08:44,369 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 12:08:44,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 12:08:44,371 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-09-11 12:08:44,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:08:44,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-09-11 12:08:44,371 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-09-11 12:08:44,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:44,371 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-09-11 12:08:44,371 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:44,371 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-09-11 12:08:44,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:44,372 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:44,372 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:44,572 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:44,573 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:44,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:44,573 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-09-11 12:08:44,574 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:44,574 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [301316725] [2020-09-11 12:08:44,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:44,586 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:44,857 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [301316725] [2020-09-11 12:08:44,857 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1691104043] [2020-09-11 12:08:44,858 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 [2020-09-11 12:08:44,928 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:08:44,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:44,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:44,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:44,956 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:44,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:44,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:44,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1229050040] [2020-09-11 12:08:44,957 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:44,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:44,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:44,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:44,958 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-09-11 12:08:45,642 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:45,642 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-09-11 12:08:45,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:08:45,643 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:45,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:45,644 INFO L225 Difference]: With dead ends: 117 [2020-09-11 12:08:45,644 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:08:45,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-09-11 12:08:45,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:08:45,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-09-11 12:08:45,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:08:45,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-09-11 12:08:45,646 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-09-11 12:08:45,646 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:45,647 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-09-11 12:08:45,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:45,647 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-09-11 12:08:45,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:45,647 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:45,647 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:45,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:45,848 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:45,848 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:45,849 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-09-11 12:08:45,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:45,849 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729438] [2020-09-11 12:08:45,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:45,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:46,129 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:46,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729438] [2020-09-11 12:08:46,130 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1491475970] [2020-09-11 12:08:46,130 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 [2020-09-11 12:08:46,191 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:08:46,191 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:46,192 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:46,193 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:46,220 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:46,236 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:46,236 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:46,236 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [609587325] [2020-09-11 12:08:46,236 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:46,236 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:46,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:46,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:46,237 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-09-11 12:08:47,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:47,106 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-09-11 12:08:47,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:08:47,107 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:47,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:47,107 INFO L225 Difference]: With dead ends: 114 [2020-09-11 12:08:47,107 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 12:08:47,108 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 [2020-09-11 12:08:47,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 12:08:47,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-09-11 12:08:47,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:08:47,110 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-09-11 12:08:47,110 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-09-11 12:08:47,110 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:47,110 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-09-11 12:08:47,111 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:47,111 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-09-11 12:08:47,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:47,111 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:47,111 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:47,315 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-09-11 12:08:47,315 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:47,316 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:47,316 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-09-11 12:08:47,316 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:47,316 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571998090] [2020-09-11 12:08:47,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:47,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:47,581 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:47,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571998090] [2020-09-11 12:08:47,582 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135217998] [2020-09-11 12:08:47,582 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 [2020-09-11 12:08:47,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:47,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:47,643 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:47,661 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:47,661 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:47,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:47,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782535602] [2020-09-11 12:08:47,662 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:47,662 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:47,662 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:47,662 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:47,662 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-09-11 12:08:48,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:48,476 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-09-11 12:08:48,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:08:48,477 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:48,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:48,478 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:08:48,478 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 12:08:48,479 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 [2020-09-11 12:08:48,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 12:08:48,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-09-11 12:08:48,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 12:08:48,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-09-11 12:08:48,481 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-09-11 12:08:48,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:48,481 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-09-11 12:08:48,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:48,481 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-09-11 12:08:48,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:48,482 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:48,482 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:48,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:48,683 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:48,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:48,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-09-11 12:08:48,683 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:48,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [441071368] [2020-09-11 12:08:48,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:48,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:48,961 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:48,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [441071368] [2020-09-11 12:08:48,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [904840473] [2020-09-11 12:08:48,962 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 [2020-09-11 12:08:49,023 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:49,023 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:49,024 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:49,025 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:49,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:49,066 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:49,067 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:49,067 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:49,067 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1281636673] [2020-09-11 12:08:49,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:49,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:49,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:49,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:49,068 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-09-11 12:08:50,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:50,043 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-09-11 12:08:50,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:08:50,044 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:50,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:50,044 INFO L225 Difference]: With dead ends: 112 [2020-09-11 12:08:50,045 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 12:08:50,045 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 [2020-09-11 12:08:50,045 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 12:08:50,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-09-11 12:08:50,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 12:08:50,047 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-09-11 12:08:50,047 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-09-11 12:08:50,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:50,047 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-09-11 12:08:50,047 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:50,047 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-09-11 12:08:50,048 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:50,048 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:50,048 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:50,248 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-09-11 12:08:50,249 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:50,249 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:50,249 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-09-11 12:08:50,250 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:50,250 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368558493] [2020-09-11 12:08:50,250 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:50,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:50,508 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:50,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368558493] [2020-09-11 12:08:50,508 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [316560334] [2020-09-11 12:08:50,509 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 [2020-09-11 12:08:50,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:08:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:50,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:50,592 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:50,592 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:50,592 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:50,592 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704936742] [2020-09-11 12:08:50,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:50,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:50,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:50,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:50,593 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-09-11 12:08:51,462 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:51,462 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-09-11 12:08:51,463 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:08:51,463 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:51,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:51,464 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:08:51,464 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 12:08:51,465 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 [2020-09-11 12:08:51,465 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 12:08:51,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-09-11 12:08:51,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:08:51,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-09-11 12:08:51,467 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-09-11 12:08:51,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:51,467 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-09-11 12:08:51,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:51,467 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-09-11 12:08:51,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:51,467 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:51,467 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:51,668 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-09-11 12:08:51,668 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:51,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:51,669 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-09-11 12:08:51,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:51,670 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [570503135] [2020-09-11 12:08:51,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:51,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:51,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:51,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [570503135] [2020-09-11 12:08:51,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1326871483] [2020-09-11 12:08:51,934 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 [2020-09-11 12:08:51,996 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:08:51,996 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:51,997 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:51,997 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:52,024 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:52,041 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:52,042 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:52,042 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:52,042 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1854955399] [2020-09-11 12:08:52,042 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:52,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:52,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:52,043 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:52,043 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-09-11 12:08:53,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:53,089 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-09-11 12:08:53,090 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:08:53,090 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:53,090 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:53,090 INFO L225 Difference]: With dead ends: 110 [2020-09-11 12:08:53,091 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 12:08:53,091 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 [2020-09-11 12:08:53,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 12:08:53,093 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-09-11 12:08:53,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:08:53,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-09-11 12:08:53,093 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-09-11 12:08:53,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:53,094 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-09-11 12:08:53,094 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:53,094 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-09-11 12:08:53,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:53,094 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:53,094 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:53,295 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-09-11 12:08:53,295 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:53,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:53,296 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-09-11 12:08:53,296 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:53,296 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1054791952] [2020-09-11 12:08:53,296 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:53,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:53,549 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:53,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1054791952] [2020-09-11 12:08:53,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384087535] [2020-09-11 12:08:53,550 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 [2020-09-11 12:08:53,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:08:53,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:53,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:53,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:53,640 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:53,640 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:53,641 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:53,641 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [252658668] [2020-09-11 12:08:53,641 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:53,641 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:53,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:53,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:53,642 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-09-11 12:08:54,586 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:54,587 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-09-11 12:08:54,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 12:08:54,588 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:54,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:54,588 INFO L225 Difference]: With dead ends: 111 [2020-09-11 12:08:54,589 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:08:54,589 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-09-11 12:08:54,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:08:54,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-09-11 12:08:54,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 12:08:54,592 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-09-11 12:08:54,592 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-09-11 12:08:54,592 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:54,592 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-09-11 12:08:54,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:54,592 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-09-11 12:08:54,593 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:54,593 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:54,593 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:54,793 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:54,794 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:54,794 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:54,794 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-09-11 12:08:54,795 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:54,795 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805185171] [2020-09-11 12:08:54,795 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:54,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:55,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805185171] [2020-09-11 12:08:55,046 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1191414154] [2020-09-11 12:08:55,046 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 [2020-09-11 12:08:55,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:08:55,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:55,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:55,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:55,142 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:55,161 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:55,161 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:55,161 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:55,161 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1475312588] [2020-09-11 12:08:55,162 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:55,162 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:55,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:55,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:55,162 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-09-11 12:08:56,325 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:56,326 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-09-11 12:08:56,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:08:56,327 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:56,327 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:56,327 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:08:56,327 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 12:08:56,328 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 [2020-09-11 12:08:56,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 12:08:56,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-09-11 12:08:56,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:08:56,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-09-11 12:08:56,330 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-09-11 12:08:56,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:56,331 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-09-11 12:08:56,331 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:56,331 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-09-11 12:08:56,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:56,331 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:56,331 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:56,532 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-09-11 12:08:56,532 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:56,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:56,533 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-09-11 12:08:56,533 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:56,533 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524462905] [2020-09-11 12:08:56,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:56,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:56,789 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:56,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524462905] [2020-09-11 12:08:56,790 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [241615142] [2020-09-11 12:08:56,790 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 [2020-09-11 12:08:56,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:56,851 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:56,851 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:56,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:56,875 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:56,875 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-09-11 12:08:56,875 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301308072] [2020-09-11 12:08:56,876 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-09-11 12:08:56,876 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:56,876 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-09-11 12:08:56,876 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-09-11 12:08:56,876 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-09-11 12:08:57,875 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:57,875 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-09-11 12:08:57,876 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:08:57,876 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-09-11 12:08:57,877 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:57,877 INFO L225 Difference]: With dead ends: 128 [2020-09-11 12:08:57,877 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 12:08:57,877 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 [2020-09-11 12:08:57,878 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 12:08:57,879 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-09-11 12:08:57,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:08:57,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-09-11 12:08:57,880 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-09-11 12:08:57,880 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:57,880 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-09-11 12:08:57,880 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-09-11 12:08:57,881 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-09-11 12:08:57,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-09-11 12:08:57,881 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:57,881 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:58,088 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:58,089 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:58,089 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:58,089 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-09-11 12:08:58,089 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:58,090 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [642580026] [2020-09-11 12:08:58,090 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:58,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:08:58,344 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:58,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [642580026] [2020-09-11 12:08:58,345 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593129299] [2020-09-11 12:08:58,345 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 [2020-09-11 12:08:58,405 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:08:58,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:08:58,407 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-09-11 12:08:58,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:08:58,435 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:08:58,455 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:08:58,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:08:58,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-09-11 12:08:58,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663792479] [2020-09-11 12:08:58,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:08:58,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:08:58,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:08:58,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:08:58,457 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-09-11 12:08:59,667 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:08:59,667 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-09-11 12:08:59,668 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 12:08:59,668 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-09-11 12:08:59,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:08:59,669 INFO L225 Difference]: With dead ends: 109 [2020-09-11 12:08:59,669 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:08:59,670 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 12:08:59,670 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:08:59,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-09-11 12:08:59,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 12:08:59,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-09-11 12:08:59,671 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-09-11 12:08:59,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:08:59,671 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-09-11 12:08:59,671 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:08:59,672 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-09-11 12:08:59,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:08:59,672 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:08:59,672 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:08:59,872 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:08:59,873 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:08:59,873 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:08:59,873 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-09-11 12:08:59,874 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:08:59,874 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252559938] [2020-09-11 12:08:59,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:08:59,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:00,232 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:00,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252559938] [2020-09-11 12:09:00,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1992261797] [2020-09-11 12:09:00,233 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 [2020-09-11 12:09:00,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:09:00,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:00,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:00,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:00,315 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:00,315 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:00,315 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:00,315 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559097338] [2020-09-11 12:09:00,316 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:00,316 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:00,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:00,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:00,316 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-09-11 12:09:00,877 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:00,877 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-09-11 12:09:00,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:09:00,878 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:00,878 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:00,879 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:09:00,879 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:09:00,879 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 [2020-09-11 12:09:00,880 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:09:00,881 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-09-11 12:09:00,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:00,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:00,882 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:00,882 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:00,882 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:00,882 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:00,882 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:00,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:00,883 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:00,883 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:01,083 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:01,084 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:01,084 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:01,084 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-09-11 12:09:01,085 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:01,085 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1475132497] [2020-09-11 12:09:01,085 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:01,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:01,442 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:01,442 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1475132497] [2020-09-11 12:09:01,443 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1297927647] [2020-09-11 12:09:01,443 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 [2020-09-11 12:09:01,505 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:01,505 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:01,506 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:01,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:01,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:01,547 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:01,548 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:01,548 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:01,548 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036326704] [2020-09-11 12:09:01,548 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:01,548 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:01,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:01,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:01,549 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:02,241 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:02,242 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 12:09:02,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:09:02,243 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:02,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:02,243 INFO L225 Difference]: With dead ends: 121 [2020-09-11 12:09:02,244 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 12:09:02,244 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-09-11 12:09:02,244 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 12:09:02,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-09-11 12:09:02,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:02,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:02,246 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:02,246 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:02,246 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:02,246 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:02,246 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:02,247 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:02,247 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:02,247 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:02,447 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:02,448 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:02,448 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:02,448 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-09-11 12:09:02,448 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:02,449 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [429469213] [2020-09-11 12:09:02,449 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:02,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:02,782 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:02,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [429469213] [2020-09-11 12:09:02,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1477516674] [2020-09-11 12:09:02,783 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 [2020-09-11 12:09:02,854 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:09:02,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:02,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:02,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:02,870 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:02,871 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:02,871 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:02,871 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1033700830] [2020-09-11 12:09:02,871 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:02,871 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:02,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:02,872 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:02,872 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:03,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:03,526 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 12:09:03,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:09:03,527 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:03,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:03,528 INFO L225 Difference]: With dead ends: 118 [2020-09-11 12:09:03,528 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 12:09:03,528 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 [2020-09-11 12:09:03,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 12:09:03,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-09-11 12:09:03,531 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:03,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:03,532 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:03,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:03,532 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:03,532 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:03,532 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:03,532 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:03,533 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:03,533 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:03,736 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:03,736 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:03,737 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:03,737 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-09-11 12:09:03,737 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:03,738 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [579620241] [2020-09-11 12:09:03,738 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:03,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:04,082 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:04,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [579620241] [2020-09-11 12:09:04,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [51821626] [2020-09-11 12:09:04,083 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 [2020-09-11 12:09:04,148 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:09:04,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:04,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:04,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:04,176 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:04,190 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:04,190 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:04,191 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:04,191 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430818349] [2020-09-11 12:09:04,191 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:04,191 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:04,191 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:04,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:04,192 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:04,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:04,998 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-09-11 12:09:04,999 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:09:04,999 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:04,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:05,000 INFO L225 Difference]: With dead ends: 117 [2020-09-11 12:09:05,000 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:09:05,000 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 [2020-09-11 12:09:05,001 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:09:05,002 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-09-11 12:09:05,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:05,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:05,002 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:05,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:05,003 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:05,003 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:05,003 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:05,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:05,003 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:05,003 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:05,204 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-09-11 12:09:05,204 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:05,204 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:05,204 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-09-11 12:09:05,205 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:05,205 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2078080115] [2020-09-11 12:09:05,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:05,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:05,515 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:05,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2078080115] [2020-09-11 12:09:05,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [888710536] [2020-09-11 12:09:05,515 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 [2020-09-11 12:09:05,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:05,578 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:05,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:05,595 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:05,596 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:05,596 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:05,596 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940430430] [2020-09-11 12:09:05,596 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:05,596 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:05,596 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:05,596 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:05,597 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:06,308 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:06,309 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-09-11 12:09:06,309 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:09:06,310 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:06,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:06,310 INFO L225 Difference]: With dead ends: 114 [2020-09-11 12:09:06,310 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 12:09:06,311 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-09-11 12:09:06,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 12:09:06,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-09-11 12:09:06,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:06,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:06,312 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:06,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:06,313 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:06,313 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:06,313 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:06,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:06,313 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:06,313 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:06,515 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-09-11 12:09:06,516 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:06,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:06,517 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-09-11 12:09:06,517 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:06,517 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1514442123] [2020-09-11 12:09:06,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:06,527 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:06,841 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:06,841 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1514442123] [2020-09-11 12:09:06,842 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187275285] [2020-09-11 12:09:06,842 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 [2020-09-11 12:09:06,904 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:06,904 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:06,905 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:06,906 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:06,933 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:06,949 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:06,950 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:06,950 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:06,950 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [663492530] [2020-09-11 12:09:06,950 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:06,950 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:06,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:06,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:06,951 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:07,862 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:07,862 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-09-11 12:09:07,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:09:07,863 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:07,863 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:07,863 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:09:07,864 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 12:09:07,864 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 [2020-09-11 12:09:07,864 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 12:09:07,866 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-09-11 12:09:07,866 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:07,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:07,866 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:07,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:07,867 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:07,867 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:07,867 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:07,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:07,867 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:07,867 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:08,075 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-09-11 12:09:08,075 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:08,075 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:08,076 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-09-11 12:09:08,076 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:08,076 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252629808] [2020-09-11 12:09:08,076 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:08,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:08,385 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:08,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252629808] [2020-09-11 12:09:08,386 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [803525242] [2020-09-11 12:09:08,386 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 [2020-09-11 12:09:08,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:09:08,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:08,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:08,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:08,479 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:08,479 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:08,479 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:08,479 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [23647046] [2020-09-11 12:09:08,479 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:08,480 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:08,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:08,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:08,480 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:09,287 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:09,288 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-09-11 12:09:09,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:09:09,289 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:09,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:09,289 INFO L225 Difference]: With dead ends: 110 [2020-09-11 12:09:09,290 INFO L226 Difference]: Without dead ends: 104 [2020-09-11 12:09:09,290 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 [2020-09-11 12:09:09,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-09-11 12:09:09,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-09-11 12:09:09,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:09,294 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:09,294 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:09,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:09,294 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:09,294 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:09,294 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:09,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:09,294 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:09,295 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:09,495 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-09-11 12:09:09,496 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:09,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:09,496 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-09-11 12:09:09,496 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:09,497 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2043696133] [2020-09-11 12:09:09,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:09,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:09,805 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2043696133] [2020-09-11 12:09:09,806 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1262147005] [2020-09-11 12:09:09,806 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 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 [2020-09-11 12:09:09,868 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:09,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:09,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:09,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:09,896 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:09,917 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:09,917 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:09,917 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:09,917 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [221728656] [2020-09-11 12:09:09,918 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:09,918 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:09,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:09,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:09,919 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:10,946 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:10,946 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-09-11 12:09:10,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:09:10,947 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:10,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:10,948 INFO L225 Difference]: With dead ends: 109 [2020-09-11 12:09:10,948 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 12:09:10,948 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 [2020-09-11 12:09:10,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 12:09:10,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-09-11 12:09:10,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:10,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:10,950 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:10,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:10,950 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:10,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:10,950 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:10,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:10,951 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:10,951 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:11,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:11,152 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:11,152 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:11,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-09-11 12:09:11,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:11,153 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [363043482] [2020-09-11 12:09:11,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:11,162 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:11,451 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:11,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [363043482] [2020-09-11 12:09:11,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994888928] [2020-09-11 12:09:11,452 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 [2020-09-11 12:09:11,516 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:09:11,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:11,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:11,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:11,539 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:11,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:11,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:11,540 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189067600] [2020-09-11 12:09:11,540 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:11,540 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:11,540 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:11,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:11,540 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:12,431 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:12,431 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-09-11 12:09:12,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:09:12,432 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:12,432 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:12,433 INFO L225 Difference]: With dead ends: 106 [2020-09-11 12:09:12,433 INFO L226 Difference]: Without dead ends: 100 [2020-09-11 12:09:12,433 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 [2020-09-11 12:09:12,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-09-11 12:09:12,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-09-11 12:09:12,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:12,435 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:12,436 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:12,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:12,436 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:12,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:12,436 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:12,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:12,437 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:12,437 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:12,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-09-11 12:09:12,638 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:12,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:12,638 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-09-11 12:09:12,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:12,639 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830948315] [2020-09-11 12:09:12,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:12,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:12,939 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:12,939 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830948315] [2020-09-11 12:09:12,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870502276] [2020-09-11 12:09:12,940 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 [2020-09-11 12:09:13,006 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:09:13,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:13,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:13,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:13,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:13,053 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:13,053 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:13,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:13,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1126776580] [2020-09-11 12:09:13,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:13,054 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:13,054 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:13,054 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:13,054 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:14,192 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:14,192 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-09-11 12:09:14,193 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:09:14,193 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:14,194 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:14,194 INFO L225 Difference]: With dead ends: 105 [2020-09-11 12:09:14,194 INFO L226 Difference]: Without dead ends: 99 [2020-09-11 12:09:14,195 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 [2020-09-11 12:09:14,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-09-11 12:09:14,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-09-11 12:09:14,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:14,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:14,196 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:14,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:14,196 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:14,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:14,197 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:14,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:14,197 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:14,197 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:14,397 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:14,398 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:14,398 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:14,398 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-09-11 12:09:14,399 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:14,399 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992955787] [2020-09-11 12:09:14,399 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:14,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:14,692 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:14,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992955787] [2020-09-11 12:09:14,693 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1345348091] [2020-09-11 12:09:14,693 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 [2020-09-11 12:09:14,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:14,756 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:14,757 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:14,779 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:14,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:14,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:14,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116317828] [2020-09-11 12:09:14,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:14,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:14,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:14,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:14,781 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:15,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:15,740 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-09-11 12:09:15,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:09:15,740 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:15,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:15,741 INFO L225 Difference]: With dead ends: 102 [2020-09-11 12:09:15,741 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:09:15,742 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 [2020-09-11 12:09:15,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:09:15,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-09-11 12:09:15,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:15,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:15,744 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:15,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:15,744 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:15,745 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:15,745 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:15,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:15,745 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:15,745 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:15,946 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:15,946 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:15,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:15,947 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-09-11 12:09:15,947 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:15,947 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [104714329] [2020-09-11 12:09:15,947 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:15,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:16,239 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:16,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [104714329] [2020-09-11 12:09:16,240 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113393236] [2020-09-11 12:09:16,240 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 [2020-09-11 12:09:16,301 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:16,302 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:16,303 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:16,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:16,332 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:16,351 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:16,352 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:16,352 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:16,352 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [281844163] [2020-09-11 12:09:16,352 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:16,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:16,353 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:16,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:16,353 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:17,610 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:17,611 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-09-11 12:09:17,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:09:17,612 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:17,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:17,612 INFO L225 Difference]: With dead ends: 101 [2020-09-11 12:09:17,613 INFO L226 Difference]: Without dead ends: 95 [2020-09-11 12:09:17,613 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-09-11 12:09:17,613 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-09-11 12:09:17,614 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-09-11 12:09:17,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:17,615 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:17,615 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:17,615 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:17,615 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:17,615 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:17,615 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:17,616 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:17,616 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:17,616 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:17,817 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-09-11 12:09:17,818 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:17,818 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:17,818 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-09-11 12:09:17,819 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:17,819 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1992871610] [2020-09-11 12:09:17,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:17,831 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:18,074 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:18,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1992871610] [2020-09-11 12:09:18,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1953863686] [2020-09-11 12:09:18,075 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 [2020-09-11 12:09:18,140 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-09-11 12:09:18,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:18,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:18,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:18,165 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:18,166 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:18,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:18,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152183525] [2020-09-11 12:09:18,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:18,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:18,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:18,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:18,167 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:19,217 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:19,218 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-09-11 12:09:19,218 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 12:09:19,219 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:19,219 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:19,219 INFO L225 Difference]: With dead ends: 98 [2020-09-11 12:09:19,219 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 12:09:19,220 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 [2020-09-11 12:09:19,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 12:09:19,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-09-11 12:09:19,221 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:19,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:19,222 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-09-11 12:09:19,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:19,222 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:19,222 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:19,223 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:19,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:19,223 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:19,223 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:19,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:19,424 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:19,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:19,424 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-09-11 12:09:19,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:19,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707318013] [2020-09-11 12:09:19,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:19,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:19,707 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:19,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707318013] [2020-09-11 12:09:19,708 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [677668058] [2020-09-11 12:09:19,708 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 [2020-09-11 12:09:19,769 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:19,769 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:19,770 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:19,771 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:19,800 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:19,818 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:19,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:19,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:19,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [509999784] [2020-09-11 12:09:19,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:19,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:19,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:19,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:19,819 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-09-11 12:09:21,193 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:21,193 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-09-11 12:09:21,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 12:09:21,194 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:21,195 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:21,195 INFO L225 Difference]: With dead ends: 97 [2020-09-11 12:09:21,195 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 12:09:21,195 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 [2020-09-11 12:09:21,195 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 12:09:21,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-09-11 12:09:21,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:21,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:21,197 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-09-11 12:09:21,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:21,197 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:21,197 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:21,198 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:21,198 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:21,198 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:21,198 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:21,399 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-09-11 12:09:21,399 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:21,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:21,400 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-09-11 12:09:21,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:21,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [667416462] [2020-09-11 12:09:21,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:21,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:21,680 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:21,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [667416462] [2020-09-11 12:09:21,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1287215335] [2020-09-11 12:09:21,681 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 [2020-09-11 12:09:21,751 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-09-11 12:09:21,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:21,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:21,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:21,779 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:21,780 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:21,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-09-11 12:09:21,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [841817793] [2020-09-11 12:09:21,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-09-11 12:09:21,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:21,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-09-11 12:09:21,781 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-09-11 12:09:21,781 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-09-11 12:09:22,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:22,889 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-09-11 12:09:22,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:09:22,890 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-09-11 12:09:22,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:22,890 INFO L225 Difference]: With dead ends: 113 [2020-09-11 12:09:22,891 INFO L226 Difference]: Without dead ends: 107 [2020-09-11 12:09:22,891 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 12:09:22,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-09-11 12:09:22,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-09-11 12:09:22,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-09-11 12:09:22,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-09-11 12:09:22,893 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-09-11 12:09:22,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:22,893 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-09-11 12:09:22,893 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-09-11 12:09:22,894 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-09-11 12:09:22,894 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:22,894 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:22,894 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:23,094 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-09-11 12:09:23,095 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:23,095 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:23,095 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-09-11 12:09:23,096 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:23,096 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [202079015] [2020-09-11 12:09:23,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:23,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:23,378 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:23,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [202079015] [2020-09-11 12:09:23,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [990249616] [2020-09-11 12:09:23,379 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 [2020-09-11 12:09:23,445 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-09-11 12:09:23,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:23,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:23,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:23,487 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:23,505 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:23,506 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:23,506 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:23,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [923832043] [2020-09-11 12:09:23,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:23,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:23,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:23,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:23,508 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-09-11 12:09:24,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:24,912 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-09-11 12:09:24,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 12:09:24,914 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:24,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:24,914 INFO L225 Difference]: With dead ends: 94 [2020-09-11 12:09:24,914 INFO L226 Difference]: Without dead ends: 86 [2020-09-11 12:09:24,915 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 [2020-09-11 12:09:24,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-09-11 12:09:24,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-09-11 12:09:24,923 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-09-11 12:09:24,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-09-11 12:09:24,923 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-09-11 12:09:24,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:24,923 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-09-11 12:09:24,923 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:24,923 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-09-11 12:09:24,924 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-09-11 12:09:24,924 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:24,924 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:25,124 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-09-11 12:09:25,125 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:25,125 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:25,125 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-09-11 12:09:25,126 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:25,126 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [152157585] [2020-09-11 12:09:25,126 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:25,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:25,366 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:25,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [152157585] [2020-09-11 12:09:25,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1041932009] [2020-09-11 12:09:25,367 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 [2020-09-11 12:09:25,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:25,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-09-11 12:09:25,430 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:25,465 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:09:25,488 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:25,488 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:25,488 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-09-11 12:09:25,489 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1731105436] [2020-09-11 12:09:25,489 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:25,489 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:25,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:25,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:25,490 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-09-11 12:09:26,811 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:26,811 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 12:09:26,812 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:09:26,812 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-09-11 12:09:26,812 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:26,813 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:09:26,813 INFO L226 Difference]: Without dead ends: 103 [2020-09-11 12:09:26,813 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 [2020-09-11 12:09:26,814 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-09-11 12:09:26,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-09-11 12:09:26,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:09:26,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 12:09:26,815 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-09-11 12:09:26,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:26,816 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 12:09:26,816 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:26,816 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 12:09:26,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:26,816 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:26,816 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:27,017 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-09-11 12:09:27,017 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:27,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:27,018 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-09-11 12:09:27,018 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:27,018 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177315197] [2020-09-11 12:09:27,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:27,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:27,323 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:27,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [177315197] [2020-09-11 12:09:27,324 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131104398] [2020-09-11 12:09:27,324 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 [2020-09-11 12:09:27,386 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:27,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:27,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:27,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:27,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:09:27,442 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:27,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:27,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:27,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618400712] [2020-09-11 12:09:27,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:27,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:27,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:27,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:27,444 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-09-11 12:09:28,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:28,886 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-09-11 12:09:28,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:09:28,887 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:28,887 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:28,888 INFO L225 Difference]: With dead ends: 90 [2020-09-11 12:09:28,888 INFO L226 Difference]: Without dead ends: 85 [2020-09-11 12:09:28,888 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 [2020-09-11 12:09:28,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-09-11 12:09:28,890 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-09-11 12:09:28,890 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-09-11 12:09:28,890 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-09-11 12:09:28,890 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-09-11 12:09:28,890 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:28,890 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-09-11 12:09:28,890 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:28,890 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-09-11 12:09:28,891 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:28,891 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:28,891 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:29,091 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:29,092 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:29,092 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:29,092 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-09-11 12:09:29,093 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:29,093 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [947042797] [2020-09-11 12:09:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:29,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:29,478 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:29,478 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [947042797] [2020-09-11 12:09:29,479 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1998833921] [2020-09-11 12:09:29,479 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 [2020-09-11 12:09:29,545 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:09:29,545 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:29,546 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:29,547 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:29,559 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:29,559 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:29,559 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:29,559 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285037892] [2020-09-11 12:09:29,559 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:29,559 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:29,560 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:29,560 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:29,560 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-09-11 12:09:30,173 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:30,173 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-09-11 12:09:30,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-09-11 12:09:30,174 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:30,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:30,175 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:09:30,175 INFO L226 Difference]: Without dead ends: 90 [2020-09-11 12:09:30,176 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 [2020-09-11 12:09:30,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-09-11 12:09:30,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-09-11 12:09:30,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:09:30,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-09-11 12:09:30,178 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-09-11 12:09:30,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:30,178 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-09-11 12:09:30,178 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:30,178 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-09-11 12:09:30,178 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:30,178 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:30,179 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:30,379 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:30,379 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:30,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:30,380 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-09-11 12:09:30,380 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:30,380 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1534325228] [2020-09-11 12:09:30,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:30,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:30,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1534325228] [2020-09-11 12:09:30,782 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447801928] [2020-09-11 12:09:30,782 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 [2020-09-11 12:09:30,847 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:30,847 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:30,848 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:30,848 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:30,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:30,888 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:30,888 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:30,888 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [871878931] [2020-09-11 12:09:30,888 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:30,889 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:30,889 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:30,889 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:30,889 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-09-11 12:09:31,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:31,518 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-09-11 12:09:31,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:09:31,519 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:31,519 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:31,520 INFO L225 Difference]: With dead ends: 114 [2020-09-11 12:09:31,520 INFO L226 Difference]: Without dead ends: 108 [2020-09-11 12:09:31,520 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 [2020-09-11 12:09:31,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-09-11 12:09:31,522 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-09-11 12:09:31,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-09-11 12:09:31,522 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-09-11 12:09:31,522 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-09-11 12:09:31,522 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:31,522 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-09-11 12:09:31,522 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:31,523 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-09-11 12:09:31,523 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:31,523 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:31,523 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:31,723 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:31,724 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:31,724 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:31,724 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-09-11 12:09:31,725 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:31,725 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [120191051] [2020-09-11 12:09:31,725 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:31,735 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:32,111 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:32,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [120191051] [2020-09-11 12:09:32,111 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091729331] [2020-09-11 12:09:32,111 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 [2020-09-11 12:09:32,183 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:09:32,184 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:32,185 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:32,185 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:32,199 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:32,199 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:32,199 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:32,199 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358025547] [2020-09-11 12:09:32,200 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:32,200 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:32,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:32,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:32,200 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-09-11 12:09:32,910 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:32,910 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-09-11 12:09:32,911 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:09:32,911 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:32,911 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:32,912 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:09:32,912 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 12:09:32,912 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 [2020-09-11 12:09:32,912 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 12:09:32,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-09-11 12:09:32,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-09-11 12:09:32,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-09-11 12:09:32,914 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-09-11 12:09:32,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:32,914 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-09-11 12:09:32,914 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:32,914 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-09-11 12:09:32,914 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:32,914 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:32,914 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:33,115 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:33,115 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:33,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:33,116 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-09-11 12:09:33,116 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:33,116 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1236655300] [2020-09-11 12:09:33,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:33,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:33,512 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:33,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1236655300] [2020-09-11 12:09:33,513 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1729513815] [2020-09-11 12:09:33,513 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 [2020-09-11 12:09:33,579 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:09:33,580 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:33,581 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:33,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:33,610 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:33,625 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:33,625 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:33,625 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:33,625 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559904261] [2020-09-11 12:09:33,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:33,626 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:33,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:33,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:33,626 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-09-11 12:09:34,394 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:34,394 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-09-11 12:09:34,395 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:09:34,395 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:34,396 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:34,396 INFO L225 Difference]: With dead ends: 129 [2020-09-11 12:09:34,396 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 12:09:34,397 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 [2020-09-11 12:09:34,397 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 12:09:34,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-09-11 12:09:34,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-09-11 12:09:34,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-09-11 12:09:34,401 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-09-11 12:09:34,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:34,401 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-09-11 12:09:34,401 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:34,401 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-09-11 12:09:34,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:34,402 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:34,402 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:34,610 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:34,610 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:34,611 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:34,611 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-09-11 12:09:34,611 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:34,611 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487156622] [2020-09-11 12:09:34,612 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:34,621 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:34,961 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:34,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487156622] [2020-09-11 12:09:34,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007215388] [2020-09-11 12:09:34,961 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 [2020-09-11 12:09:35,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:35,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:35,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:35,040 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:35,040 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:35,040 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:35,040 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [814693626] [2020-09-11 12:09:35,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:35,041 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:35,041 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:35,041 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:35,041 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-09-11 12:09:35,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:35,850 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-09-11 12:09:35,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:09:35,851 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:35,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:35,852 INFO L225 Difference]: With dead ends: 129 [2020-09-11 12:09:35,852 INFO L226 Difference]: Without dead ends: 123 [2020-09-11 12:09:35,852 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 [2020-09-11 12:09:35,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-09-11 12:09:35,854 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-09-11 12:09:35,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-09-11 12:09:35,854 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-09-11 12:09:35,854 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-09-11 12:09:35,854 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:35,854 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-09-11 12:09:35,854 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:35,854 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-09-11 12:09:35,855 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:35,855 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:35,855 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:36,055 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:36,056 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:36,056 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:36,056 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-09-11 12:09:36,057 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:36,057 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [409661160] [2020-09-11 12:09:36,057 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:36,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:36,424 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:36,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [409661160] [2020-09-11 12:09:36,425 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1831870769] [2020-09-11 12:09:36,425 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 [2020-09-11 12:09:36,487 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:36,487 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:36,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:36,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:36,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:36,538 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:36,539 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:36,539 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:36,539 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484434412] [2020-09-11 12:09:36,539 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:36,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:36,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:36,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:36,540 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-09-11 12:09:37,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:37,467 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-09-11 12:09:37,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:09:37,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:37,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:37,469 INFO L225 Difference]: With dead ends: 126 [2020-09-11 12:09:37,469 INFO L226 Difference]: Without dead ends: 120 [2020-09-11 12:09:37,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:09:37,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-09-11 12:09:37,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-09-11 12:09:37,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 12:09:37,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-09-11 12:09:37,473 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-09-11 12:09:37,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:37,473 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-09-11 12:09:37,473 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:37,473 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-09-11 12:09:37,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:37,473 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:37,473 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:37,674 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:37,674 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:37,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:37,675 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-09-11 12:09:37,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:37,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830543488] [2020-09-11 12:09:37,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:37,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:38,015 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:38,015 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830543488] [2020-09-11 12:09:38,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [981225149] [2020-09-11 12:09:38,016 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 [2020-09-11 12:09:38,085 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:09:38,085 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:38,087 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:38,087 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:38,103 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:38,104 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:38,104 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:38,104 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131776876] [2020-09-11 12:09:38,104 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:38,104 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:38,104 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:38,104 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:38,105 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-09-11 12:09:38,962 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:38,963 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-09-11 12:09:38,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:09:38,964 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:38,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:38,964 INFO L225 Difference]: With dead ends: 127 [2020-09-11 12:09:38,965 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:09:38,965 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 [2020-09-11 12:09:38,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:09:38,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-09-11 12:09:38,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:09:38,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-09-11 12:09:38,967 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-09-11 12:09:38,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:38,967 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-09-11 12:09:38,967 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:38,967 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-09-11 12:09:38,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:38,968 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:38,968 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:39,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-09-11 12:09:39,169 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:39,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:39,169 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-09-11 12:09:39,169 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:39,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [505203504] [2020-09-11 12:09:39,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:39,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:39,521 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:39,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [505203504] [2020-09-11 12:09:39,522 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586527786] [2020-09-11 12:09:39,522 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 [2020-09-11 12:09:39,585 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:39,585 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:39,586 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:39,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:39,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:39,634 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:39,635 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:39,635 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:39,635 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346111634] [2020-09-11 12:09:39,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:39,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:39,636 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:39,636 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:39,636 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-09-11 12:09:40,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:40,639 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-09-11 12:09:40,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:09:40,645 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:40,645 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:40,645 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:09:40,645 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:09:40,646 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 [2020-09-11 12:09:40,646 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:09:40,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-09-11 12:09:40,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:09:40,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-09-11 12:09:40,647 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-09-11 12:09:40,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:40,647 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-09-11 12:09:40,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:40,647 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-09-11 12:09:40,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:40,648 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:40,648 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:40,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-09-11 12:09:40,849 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:40,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:40,849 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-09-11 12:09:40,849 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:40,850 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110773585] [2020-09-11 12:09:40,850 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:40,859 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:41,174 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:41,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110773585] [2020-09-11 12:09:41,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1187787676] [2020-09-11 12:09:41,175 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 [2020-09-11 12:09:41,242 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:09:41,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:41,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:41,244 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:41,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:41,262 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:41,262 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:41,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1909224525] [2020-09-11 12:09:41,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:41,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:41,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:41,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:41,264 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-09-11 12:09:42,149 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:42,150 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-09-11 12:09:42,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:09:42,151 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:42,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:42,152 INFO L225 Difference]: With dead ends: 125 [2020-09-11 12:09:42,152 INFO L226 Difference]: Without dead ends: 119 [2020-09-11 12:09:42,152 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 [2020-09-11 12:09:42,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-09-11 12:09:42,154 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-09-11 12:09:42,154 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 12:09:42,154 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-09-11 12:09:42,154 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-09-11 12:09:42,154 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:42,154 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-09-11 12:09:42,155 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:42,155 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-09-11 12:09:42,155 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:42,155 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:42,155 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:42,355 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-09-11 12:09:42,356 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:42,356 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:42,356 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-09-11 12:09:42,357 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:42,357 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158280173] [2020-09-11 12:09:42,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:42,368 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:42,704 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:42,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158280173] [2020-09-11 12:09:42,704 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665503296] [2020-09-11 12:09:42,705 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 [2020-09-11 12:09:42,772 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:09:42,772 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:42,773 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:42,774 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:42,804 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:42,823 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:42,824 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:42,824 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:42,824 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019807013] [2020-09-11 12:09:42,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:42,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:42,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:42,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:42,825 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-09-11 12:09:43,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:43,920 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-09-11 12:09:43,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:09:43,921 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:43,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:43,922 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:09:43,922 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 12:09:43,922 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 [2020-09-11 12:09:43,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 12:09:43,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-09-11 12:09:43,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-09-11 12:09:43,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-09-11 12:09:43,924 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-09-11 12:09:43,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:43,925 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-09-11 12:09:43,925 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:43,925 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-09-11 12:09:43,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:43,925 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:43,925 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:44,126 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-09-11 12:09:44,126 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:44,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:44,127 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-09-11 12:09:44,127 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:44,127 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843071613] [2020-09-11 12:09:44,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:44,141 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:44,421 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:44,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843071613] [2020-09-11 12:09:44,422 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1785442508] [2020-09-11 12:09:44,422 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 [2020-09-11 12:09:44,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:44,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:44,484 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:44,505 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:44,505 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:44,505 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:44,506 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846822414] [2020-09-11 12:09:44,507 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:44,507 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:44,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:44,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:44,507 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-09-11 12:09:45,567 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:45,568 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-09-11 12:09:45,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 12:09:45,569 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:45,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:45,569 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:09:45,569 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:09:45,569 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 [2020-09-11 12:09:45,570 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:09:45,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-09-11 12:09:45,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-09-11 12:09:45,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-09-11 12:09:45,571 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-09-11 12:09:45,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:45,572 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-09-11 12:09:45,572 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:45,572 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-09-11 12:09:45,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:45,572 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:45,572 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:45,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:45,773 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:45,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:45,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-09-11 12:09:45,774 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:45,774 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [340587853] [2020-09-11 12:09:45,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:45,785 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:46,095 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:46,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [340587853] [2020-09-11 12:09:46,095 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [875908861] [2020-09-11 12:09:46,096 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 [2020-09-11 12:09:46,156 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:46,157 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:46,157 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:46,158 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:46,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:46,206 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:46,207 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:46,207 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:46,207 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [442128848] [2020-09-11 12:09:46,207 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:46,207 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:46,207 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:46,208 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:46,208 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-09-11 12:09:47,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:47,441 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-09-11 12:09:47,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:09:47,442 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:47,442 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:47,442 INFO L225 Difference]: With dead ends: 120 [2020-09-11 12:09:47,443 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 12:09:47,443 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 [2020-09-11 12:09:47,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 12:09:47,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-09-11 12:09:47,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-09-11 12:09:47,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-09-11 12:09:47,445 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-09-11 12:09:47,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:47,445 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-09-11 12:09:47,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:47,446 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-09-11 12:09:47,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:47,446 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:47,446 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:47,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:47,647 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:47,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:47,647 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-09-11 12:09:47,648 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:47,648 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430278927] [2020-09-11 12:09:47,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:47,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:47,969 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:47,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430278927] [2020-09-11 12:09:47,969 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1462960463] [2020-09-11 12:09:47,970 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 [2020-09-11 12:09:48,038 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:09:48,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:48,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:48,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:48,065 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:48,065 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:48,065 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:48,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [37325536] [2020-09-11 12:09:48,066 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:48,066 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:48,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:48,066 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-09-11 12:09:49,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:49,198 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-09-11 12:09:49,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:09:49,199 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:49,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:49,200 INFO L225 Difference]: With dead ends: 121 [2020-09-11 12:09:49,200 INFO L226 Difference]: Without dead ends: 115 [2020-09-11 12:09:49,200 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 [2020-09-11 12:09:49,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-09-11 12:09:49,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-09-11 12:09:49,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-09-11 12:09:49,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-09-11 12:09:49,202 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-09-11 12:09:49,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:49,203 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-09-11 12:09:49,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:49,203 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-09-11 12:09:49,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:49,203 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:49,203 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:49,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-09-11 12:09:49,404 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:49,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:49,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-09-11 12:09:49,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:49,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1388263545] [2020-09-11 12:09:49,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:49,416 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:49,715 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:49,715 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1388263545] [2020-09-11 12:09:49,716 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [711403022] [2020-09-11 12:09:49,716 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 [2020-09-11 12:09:49,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:09:49,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:49,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:49,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:49,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:49,835 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:49,836 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:49,836 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:49,836 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [908476601] [2020-09-11 12:09:49,836 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:49,836 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:49,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:49,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:49,837 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-09-11 12:09:51,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:51,161 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-09-11 12:09:51,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 12:09:51,162 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:51,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:51,163 INFO L225 Difference]: With dead ends: 118 [2020-09-11 12:09:51,163 INFO L226 Difference]: Without dead ends: 112 [2020-09-11 12:09:51,163 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 [2020-09-11 12:09:51,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-09-11 12:09:51,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-09-11 12:09:51,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-09-11 12:09:51,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-09-11 12:09:51,166 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-09-11 12:09:51,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:51,166 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-09-11 12:09:51,166 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:51,166 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-09-11 12:09:51,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:51,166 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:51,166 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:51,367 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:51,367 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:51,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:51,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-09-11 12:09:51,369 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:51,369 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913873951] [2020-09-11 12:09:51,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:51,379 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:51,679 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:51,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913873951] [2020-09-11 12:09:51,680 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1577279392] [2020-09-11 12:09:51,680 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 [2020-09-11 12:09:51,745 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:09:51,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:51,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:51,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:51,771 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:51,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:51,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:51,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [4752127] [2020-09-11 12:09:51,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:51,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:51,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:51,773 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:51,773 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-09-11 12:09:52,968 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:52,968 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-09-11 12:09:52,969 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 12:09:52,969 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:52,969 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:52,970 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:09:52,971 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:09:52,971 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 [2020-09-11 12:09:52,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:09:52,973 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-09-11 12:09:52,973 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-09-11 12:09:52,973 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-09-11 12:09:52,973 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-09-11 12:09:52,973 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:52,974 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-09-11 12:09:52,974 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:52,974 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-09-11 12:09:52,974 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:52,974 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:52,974 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:53,183 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:53,183 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:53,183 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:53,184 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-09-11 12:09:53,184 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:53,184 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2110984199] [2020-09-11 12:09:53,184 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:53,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:53,491 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:53,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2110984199] [2020-09-11 12:09:53,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1184122925] [2020-09-11 12:09:53,492 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 [2020-09-11 12:09:53,559 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:09:53,559 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:53,560 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:53,561 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:53,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:53,630 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:53,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:53,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:53,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684246045] [2020-09-11 12:09:53,631 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:53,631 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:53,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:53,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:53,631 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-09-11 12:09:55,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:55,039 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-09-11 12:09:55,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 12:09:55,040 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:55,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:55,040 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:09:55,041 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 12:09:55,041 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 [2020-09-11 12:09:55,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 12:09:55,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-09-11 12:09:55,043 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-09-11 12:09:55,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-09-11 12:09:55,044 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-09-11 12:09:55,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:55,044 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-09-11 12:09:55,044 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:55,044 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-09-11 12:09:55,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:55,045 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:55,045 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:55,251 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:55,252 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:55,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:55,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-09-11 12:09:55,252 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:55,253 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729435580] [2020-09-11 12:09:55,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:55,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:55,566 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:55,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729435580] [2020-09-11 12:09:55,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1463203662] [2020-09-11 12:09:55,567 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 [2020-09-11 12:09:55,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:55,634 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:55,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:55,664 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:55,665 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:55,665 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-09-11 12:09:55,665 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069423401] [2020-09-11 12:09:55,665 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-09-11 12:09:55,666 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:55,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-09-11 12:09:55,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-09-11 12:09:55,666 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-09-11 12:09:56,900 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:56,901 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-09-11 12:09:56,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 12:09:56,902 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-09-11 12:09:56,902 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:56,902 INFO L225 Difference]: With dead ends: 136 [2020-09-11 12:09:56,903 INFO L226 Difference]: Without dead ends: 130 [2020-09-11 12:09:56,903 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 [2020-09-11 12:09:56,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-09-11 12:09:56,905 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-09-11 12:09:56,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 12:09:56,906 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-09-11 12:09:56,906 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-09-11 12:09:56,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:56,906 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-09-11 12:09:56,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-09-11 12:09:56,907 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-09-11 12:09:56,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-09-11 12:09:56,907 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:56,907 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:57,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:57,116 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:57,116 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:57,116 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-09-11 12:09:57,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:57,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [571278325] [2020-09-11 12:09:57,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:57,131 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:57,430 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:57,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [571278325] [2020-09-11 12:09:57,431 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [261419229] [2020-09-11 12:09:57,431 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 [2020-09-11 12:09:57,492 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:09:57,493 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:57,494 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-09-11 12:09:57,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:57,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:09:57,543 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:57,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:57,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-09-11 12:09:57,544 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320835473] [2020-09-11 12:09:57,544 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:57,544 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:57,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:57,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:57,545 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-09-11 12:09:59,031 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:09:59,031 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-09-11 12:09:59,032 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 12:09:59,032 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-09-11 12:09:59,032 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:09:59,033 INFO L225 Difference]: With dead ends: 117 [2020-09-11 12:09:59,033 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 12:09:59,033 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 [2020-09-11 12:09:59,034 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 12:09:59,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-09-11 12:09:59,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-09-11 12:09:59,035 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-09-11 12:09:59,036 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-09-11 12:09:59,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:09:59,036 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-09-11 12:09:59,036 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:09:59,036 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-09-11 12:09:59,036 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:09:59,036 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:09:59,036 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:09:59,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:09:59,237 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:09:59,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:09:59,238 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-09-11 12:09:59,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:09:59,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1993456208] [2020-09-11 12:09:59,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:09:59,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:09:59,665 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:59,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1993456208] [2020-09-11 12:09:59,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [270324118] [2020-09-11 12:09:59,670 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 [2020-09-11 12:09:59,736 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:09:59,736 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:09:59,737 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:09:59,738 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:09:59,751 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:09:59,751 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:09:59,751 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:09:59,752 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1351049971] [2020-09-11 12:09:59,752 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:09:59,752 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:09:59,752 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:09:59,752 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:09:59,752 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-09-11 12:10:00,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:00,456 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-09-11 12:10:00,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:10:00,457 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:00,458 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:00,458 INFO L225 Difference]: With dead ends: 134 [2020-09-11 12:10:00,458 INFO L226 Difference]: Without dead ends: 128 [2020-09-11 12:10:00,458 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 [2020-09-11 12:10:00,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-09-11 12:10:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-09-11 12:10:00,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:00,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:00,460 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:00,460 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:00,460 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:00,461 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:00,461 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:00,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:00,461 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:00,461 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:00,662 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-09-11 12:10:00,662 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:00,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:00,663 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-09-11 12:10:00,663 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:00,663 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [337936743] [2020-09-11 12:10:00,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:00,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:01,105 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:01,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [337936743] [2020-09-11 12:10:01,106 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227930412] [2020-09-11 12:10:01,106 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 [2020-09-11 12:10:01,168 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:01,168 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:01,169 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:01,169 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:01,198 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:01,212 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:01,212 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:01,212 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:01,212 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1762501172] [2020-09-11 12:10:01,212 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:01,213 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:01,213 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:01,213 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:01,213 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:02,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:02,076 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-09-11 12:10:02,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:10:02,078 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:02,078 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:02,078 INFO L225 Difference]: With dead ends: 131 [2020-09-11 12:10:02,078 INFO L226 Difference]: Without dead ends: 125 [2020-09-11 12:10:02,079 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 [2020-09-11 12:10:02,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-09-11 12:10:02,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-09-11 12:10:02,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:02,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:02,081 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:02,081 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:02,082 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:02,087 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:02,087 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:02,087 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:02,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:02,087 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:02,288 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-09-11 12:10:02,288 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:02,288 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:02,289 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-09-11 12:10:02,289 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:02,289 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887927215] [2020-09-11 12:10:02,289 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:02,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:02,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:02,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887927215] [2020-09-11 12:10:02,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825304071] [2020-09-11 12:10:02,724 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 [2020-09-11 12:10:02,792 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:10:02,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:02,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:02,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:02,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:02,809 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:02,810 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:02,810 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1855798641] [2020-09-11 12:10:02,810 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:02,810 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:02,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:02,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:02,811 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:03,620 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:03,620 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-09-11 12:10:03,621 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-09-11 12:10:03,622 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:03,622 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:03,622 INFO L225 Difference]: With dead ends: 128 [2020-09-11 12:10:03,622 INFO L226 Difference]: Without dead ends: 122 [2020-09-11 12:10:03,623 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 [2020-09-11 12:10:03,623 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-09-11 12:10:03,625 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-09-11 12:10:03,625 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:03,625 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:03,625 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:03,626 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:03,626 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:03,626 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:03,626 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:03,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:03,626 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:03,626 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:03,826 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:03,827 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:03,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:03,828 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-09-11 12:10:03,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:03,828 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517886635] [2020-09-11 12:10:03,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:03,838 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:04,252 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:04,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517886635] [2020-09-11 12:10:04,253 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1924188113] [2020-09-11 12:10:04,253 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 [2020-09-11 12:10:04,320 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:10:04,321 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:04,322 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:04,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:04,356 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:04,370 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:04,370 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:04,371 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:04,371 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457014173] [2020-09-11 12:10:04,372 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:04,372 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:04,372 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:04,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:04,373 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:05,346 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:05,347 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-09-11 12:10:05,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:10:05,348 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:05,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:05,349 INFO L225 Difference]: With dead ends: 127 [2020-09-11 12:10:05,349 INFO L226 Difference]: Without dead ends: 121 [2020-09-11 12:10:05,349 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-09-11 12:10:05,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-09-11 12:10:05,351 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-09-11 12:10:05,351 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:05,351 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:05,352 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:05,352 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:05,352 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:05,352 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:05,352 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:05,352 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:05,353 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:05,353 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:05,553 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-09-11 12:10:05,554 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:05,554 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:05,554 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-09-11 12:10:05,554 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:05,555 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643139167] [2020-09-11 12:10:05,555 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:05,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:05,959 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:05,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643139167] [2020-09-11 12:10:05,959 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758130137] [2020-09-11 12:10:05,960 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 [2020-09-11 12:10:06,022 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:06,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:06,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:06,041 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:06,041 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:06,041 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:06,041 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893486753] [2020-09-11 12:10:06,041 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:06,042 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:06,042 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:06,042 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:06,042 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:06,941 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:06,941 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-09-11 12:10:06,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:10:06,942 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:06,943 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:06,943 INFO L225 Difference]: With dead ends: 124 [2020-09-11 12:10:06,943 INFO L226 Difference]: Without dead ends: 118 [2020-09-11 12:10:06,943 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-09-11 12:10:06,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-09-11 12:10:06,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-09-11 12:10:06,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:06,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:06,945 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:06,945 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:06,945 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:06,945 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:06,945 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:06,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:06,946 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:06,946 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:07,146 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:07,147 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:07,147 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:07,147 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-09-11 12:10:07,148 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:07,148 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644511677] [2020-09-11 12:10:07,148 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:07,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:07,550 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:07,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644511677] [2020-09-11 12:10:07,551 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2045139173] [2020-09-11 12:10:07,551 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 [2020-09-11 12:10:07,614 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:10:07,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:07,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:07,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:07,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:07,660 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:07,660 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:07,661 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:07,661 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1445167340] [2020-09-11 12:10:07,661 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:07,661 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:07,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:07,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:07,661 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:08,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:08,700 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-09-11 12:10:08,700 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-09-11 12:10:08,701 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:08,701 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:08,701 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:10:08,701 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:10:08,702 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 [2020-09-11 12:10:08,702 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:10:08,704 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-09-11 12:10:08,704 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:08,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:08,704 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:08,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:08,705 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:08,705 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:08,705 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:08,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:08,705 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:08,705 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:08,906 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:08,906 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:08,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:08,907 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-09-11 12:10:08,907 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:08,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1498463010] [2020-09-11 12:10:08,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:08,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:09,285 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:09,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1498463010] [2020-09-11 12:10:09,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136973371] [2020-09-11 12:10:09,286 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 [2020-09-11 12:10:09,353 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:10:09,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:09,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:09,355 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:09,372 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:09,373 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:09,373 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:09,373 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379721584] [2020-09-11 12:10:09,373 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:09,373 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:09,373 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:09,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:09,374 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:10,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:10,338 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-09-11 12:10:10,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:10:10,339 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:10,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:10,340 INFO L225 Difference]: With dead ends: 120 [2020-09-11 12:10:10,340 INFO L226 Difference]: Without dead ends: 114 [2020-09-11 12:10:10,341 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 [2020-09-11 12:10:10,341 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-09-11 12:10:10,342 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-09-11 12:10:10,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:10,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:10,343 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:10,343 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:10,343 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:10,343 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:10,343 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:10,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:10,344 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:10,344 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:10,544 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:10,545 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:10,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:10,545 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-09-11 12:10:10,545 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:10,546 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828395563] [2020-09-11 12:10:10,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:10,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:10,926 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:10,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828395563] [2020-09-11 12:10:10,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1582909975] [2020-09-11 12:10:10,927 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 [2020-09-11 12:10:10,984 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:10,984 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:10,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:10,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:11,011 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:11,028 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:11,028 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:11,028 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:11,029 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817323782] [2020-09-11 12:10:11,029 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:11,029 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:11,029 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:11,029 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:11,030 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:12,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:12,237 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-09-11 12:10:12,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-09-11 12:10:12,238 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:12,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:12,239 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:10:12,239 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:10:12,239 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 [2020-09-11 12:10:12,240 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:10:12,241 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-09-11 12:10:12,241 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:12,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:12,242 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:12,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:12,242 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:12,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:12,242 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:12,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:12,243 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:12,243 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:12,445 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:12,446 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:12,446 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:12,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-09-11 12:10:12,446 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:12,447 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1135135824] [2020-09-11 12:10:12,447 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:12,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:12,815 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:12,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1135135824] [2020-09-11 12:10:12,816 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262364957] [2020-09-11 12:10:12,816 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 [2020-09-11 12:10:12,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:10:12,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:12,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:12,891 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:12,913 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:12,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:12,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:12,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1582438962] [2020-09-11 12:10:12,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:12,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:12,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:12,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:12,915 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:13,990 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:13,990 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-09-11 12:10:13,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-09-11 12:10:13,992 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:13,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:13,992 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:10:13,992 INFO L226 Difference]: Without dead ends: 110 [2020-09-11 12:10:13,993 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 [2020-09-11 12:10:13,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-09-11 12:10:13,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-09-11 12:10:13,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:13,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:13,995 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:13,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:13,995 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:13,995 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:13,995 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:13,996 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:13,996 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:13,996 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:14,196 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-09-11 12:10:14,197 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:14,197 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:14,198 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-09-11 12:10:14,198 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:14,198 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258073440] [2020-09-11 12:10:14,199 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:14,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:14,584 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:14,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258073440] [2020-09-11 12:10:14,585 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715132697] [2020-09-11 12:10:14,585 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 [2020-09-11 12:10:14,651 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:10:14,651 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:14,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:14,653 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:14,683 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:14,702 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:14,702 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:14,702 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:14,703 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [445055919] [2020-09-11 12:10:14,703 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:14,703 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:14,703 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:14,703 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:14,703 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:16,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:16,081 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-09-11 12:10:16,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-09-11 12:10:16,082 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:16,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:16,083 INFO L225 Difference]: With dead ends: 115 [2020-09-11 12:10:16,083 INFO L226 Difference]: Without dead ends: 109 [2020-09-11 12:10:16,084 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 [2020-09-11 12:10:16,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-09-11 12:10:16,085 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-09-11 12:10:16,085 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:16,085 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:16,085 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:16,086 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:16,086 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:16,086 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:16,086 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:16,086 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:16,087 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:16,087 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:16,296 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:16,296 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:16,296 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:16,297 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-09-11 12:10:16,297 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:16,297 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930096907] [2020-09-11 12:10:16,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:16,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:16,677 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:16,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930096907] [2020-09-11 12:10:16,678 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015434600] [2020-09-11 12:10:16,678 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 [2020-09-11 12:10:16,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:16,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:16,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:16,771 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:16,771 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:16,771 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:16,771 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [89740525] [2020-09-11 12:10:16,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:16,772 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:16,772 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:16,772 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:16,772 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:17,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:17,950 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-09-11 12:10:17,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-09-11 12:10:17,951 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:17,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:17,952 INFO L225 Difference]: With dead ends: 112 [2020-09-11 12:10:17,952 INFO L226 Difference]: Without dead ends: 106 [2020-09-11 12:10:17,953 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-09-11 12:10:17,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-09-11 12:10:17,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-09-11 12:10:17,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:17,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:17,954 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:17,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:17,954 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:17,955 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:17,955 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:17,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:17,955 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:17,955 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:18,155 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-09-11 12:10:18,156 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:18,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:18,156 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-09-11 12:10:18,157 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:18,157 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021397208] [2020-09-11 12:10:18,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:18,168 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:18,508 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:18,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021397208] [2020-09-11 12:10:18,509 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1205989514] [2020-09-11 12:10:18,509 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 [2020-09-11 12:10:18,570 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:10:18,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:18,571 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:18,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:18,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:18,625 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:18,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:18,626 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:18,626 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1557319782] [2020-09-11 12:10:18,626 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:18,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:18,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:18,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:18,627 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:20,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:20,100 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-09-11 12:10:20,101 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-09-11 12:10:20,101 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:20,101 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:20,101 INFO L225 Difference]: With dead ends: 111 [2020-09-11 12:10:20,101 INFO L226 Difference]: Without dead ends: 105 [2020-09-11 12:10:20,102 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 [2020-09-11 12:10:20,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-09-11 12:10:20,104 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-09-11 12:10:20,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:20,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:20,104 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:20,104 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:20,104 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:20,105 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:20,105 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:20,105 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:20,105 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:20,105 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:20,306 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-09-11 12:10:20,306 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:20,306 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:20,307 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-09-11 12:10:20,307 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:20,307 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664621984] [2020-09-11 12:10:20,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:20,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:20,647 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:20,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664621984] [2020-09-11 12:10:20,647 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023613738] [2020-09-11 12:10:20,647 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 [2020-09-11 12:10:20,714 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:10:20,714 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:20,715 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:20,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:20,739 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:20,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:20,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:20,740 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800446029] [2020-09-11 12:10:20,740 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:20,740 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:20,740 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:20,740 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:20,740 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:21,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:21,959 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-09-11 12:10:21,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-09-11 12:10:21,961 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:21,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:21,961 INFO L225 Difference]: With dead ends: 108 [2020-09-11 12:10:21,961 INFO L226 Difference]: Without dead ends: 102 [2020-09-11 12:10:21,962 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 [2020-09-11 12:10:21,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-09-11 12:10:21,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-09-11 12:10:21,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:21,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:21,964 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:21,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:21,964 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:21,964 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:21,964 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:21,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:21,965 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:21,965 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:22,167 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:22,168 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:22,168 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:22,169 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-09-11 12:10:22,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:22,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528386927] [2020-09-11 12:10:22,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:22,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:22,515 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:22,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528386927] [2020-09-11 12:10:22,515 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [176288459] [2020-09-11 12:10:22,516 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 [2020-09-11 12:10:22,577 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:22,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:22,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:22,579 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:22,612 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:22,634 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:22,634 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:22,634 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:22,634 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623561359] [2020-09-11 12:10:22,635 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:22,635 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:22,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:22,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:22,635 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:24,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:24,239 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-09-11 12:10:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-09-11 12:10:24,240 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:24,240 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:24,241 INFO L225 Difference]: With dead ends: 107 [2020-09-11 12:10:24,241 INFO L226 Difference]: Without dead ends: 101 [2020-09-11 12:10:24,241 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 [2020-09-11 12:10:24,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-09-11 12:10:24,243 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-09-11 12:10:24,243 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:24,244 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:24,244 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:24,244 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:24,244 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:24,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:24,245 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:24,245 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:24,245 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:24,245 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:24,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:24,449 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:24,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:24,450 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-09-11 12:10:24,450 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:24,450 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1517738742] [2020-09-11 12:10:24,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:24,809 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:24,809 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1517738742] [2020-09-11 12:10:24,810 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [978000169] [2020-09-11 12:10:24,810 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 [2020-09-11 12:10:24,877 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-09-11 12:10:24,877 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:24,878 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:24,878 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:24,905 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:24,905 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:24,905 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:24,906 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302914671] [2020-09-11 12:10:24,906 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:24,906 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:24,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:24,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:24,906 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:26,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:26,250 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-09-11 12:10:26,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-09-11 12:10:26,252 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:26,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:26,252 INFO L225 Difference]: With dead ends: 104 [2020-09-11 12:10:26,252 INFO L226 Difference]: Without dead ends: 98 [2020-09-11 12:10:26,253 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 [2020-09-11 12:10:26,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-09-11 12:10:26,254 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-09-11 12:10:26,254 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-09-11 12:10:26,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-09-11 12:10:26,255 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-09-11 12:10:26,255 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:26,255 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-09-11 12:10:26,255 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:26,255 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-09-11 12:10:26,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:26,256 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:26,256 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:26,456 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:26,457 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:26,457 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:26,457 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-09-11 12:10:26,457 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:26,458 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [313460004] [2020-09-11 12:10:26,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:26,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:26,811 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:26,811 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [313460004] [2020-09-11 12:10:26,812 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1669583803] [2020-09-11 12:10:26,812 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 [2020-09-11 12:10:26,883 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-09-11 12:10:26,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:26,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:26,884 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:26,919 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:26,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:26,942 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:26,942 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:26,942 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1756908718] [2020-09-11 12:10:26,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:26,943 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:26,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:26,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:26,943 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-09-11 12:10:28,730 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:28,730 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-09-11 12:10:28,731 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-09-11 12:10:28,731 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:28,731 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:28,732 INFO L225 Difference]: With dead ends: 103 [2020-09-11 12:10:28,732 INFO L226 Difference]: Without dead ends: 97 [2020-09-11 12:10:28,732 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 [2020-09-11 12:10:28,733 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-09-11 12:10:28,735 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-09-11 12:10:28,735 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-09-11 12:10:28,735 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-09-11 12:10:28,735 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-09-11 12:10:28,735 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:28,736 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-09-11 12:10:28,736 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:28,736 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-09-11 12:10:28,736 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:28,736 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:28,736 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:28,944 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-09-11 12:10:28,945 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:28,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:28,945 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-09-11 12:10:28,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:28,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779836003] [2020-09-11 12:10:28,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:28,958 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:29,286 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:29,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779836003] [2020-09-11 12:10:29,287 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [321007797] [2020-09-11 12:10:29,287 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 [2020-09-11 12:10:29,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:29,358 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:29,358 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:29,386 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:29,387 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:29,387 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-09-11 12:10:29,387 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130469999] [2020-09-11 12:10:29,387 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-09-11 12:10:29,387 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:29,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-09-11 12:10:29,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-09-11 12:10:29,388 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-09-11 12:10:30,815 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:30,815 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-09-11 12:10:30,816 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 12:10:30,816 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-09-11 12:10:30,816 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:30,817 INFO L225 Difference]: With dead ends: 119 [2020-09-11 12:10:30,817 INFO L226 Difference]: Without dead ends: 113 [2020-09-11 12:10:30,817 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 [2020-09-11 12:10:30,817 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-09-11 12:10:30,818 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-09-11 12:10:30,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-09-11 12:10:30,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-09-11 12:10:30,819 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-09-11 12:10:30,819 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:30,819 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-09-11 12:10:30,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-09-11 12:10:30,819 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-09-11 12:10:30,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:30,819 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:30,820 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:31,020 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:31,020 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:31,021 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:31,021 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-09-11 12:10:31,021 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:31,021 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1273757920] [2020-09-11 12:10:31,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:31,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:31,374 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:31,374 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1273757920] [2020-09-11 12:10:31,375 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1011143459] [2020-09-11 12:10:31,375 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 [2020-09-11 12:10:31,435 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:10:31,435 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:31,436 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:31,436 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:31,468 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:31,490 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:31,491 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:31,491 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:31,491 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [201280034] [2020-09-11 12:10:31,492 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:31,492 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:31,492 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:31,492 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:31,492 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-09-11 12:10:33,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:33,273 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-09-11 12:10:33,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-09-11 12:10:33,274 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:33,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:33,274 INFO L225 Difference]: With dead ends: 100 [2020-09-11 12:10:33,275 INFO L226 Difference]: Without dead ends: 92 [2020-09-11 12:10:33,275 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 [2020-09-11 12:10:33,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-09-11 12:10:33,276 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-09-11 12:10:33,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-09-11 12:10:33,277 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-09-11 12:10:33,277 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-09-11 12:10:33,277 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:33,277 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-09-11 12:10:33,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:33,278 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-09-11 12:10:33,278 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-09-11 12:10:33,278 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:33,278 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:33,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:33,485 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:33,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:33,486 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-09-11 12:10:33,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:33,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702279418] [2020-09-11 12:10:33,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:33,498 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:33,843 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:33,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702279418] [2020-09-11 12:10:33,844 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48739820] [2020-09-11 12:10:33,844 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 [2020-09-11 12:10:33,912 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-09-11 12:10:33,912 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:33,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-09-11 12:10:33,914 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:33,947 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:10:33,974 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:33,975 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:33,975 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-09-11 12:10:33,975 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048051856] [2020-09-11 12:10:33,975 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:33,975 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:33,976 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:33,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:33,976 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-09-11 12:10:35,676 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:35,677 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-09-11 12:10:35,677 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 12:10:35,678 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-09-11 12:10:35,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:35,678 INFO L225 Difference]: With dead ends: 116 [2020-09-11 12:10:35,678 INFO L226 Difference]: Without dead ends: 111 [2020-09-11 12:10:35,678 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-09-11 12:10:35,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-09-11 12:10:35,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-09-11 12:10:35,679 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-09-11 12:10:35,680 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-09-11 12:10:35,680 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-09-11 12:10:35,680 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:35,680 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-09-11 12:10:35,680 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:35,680 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-09-11 12:10:35,680 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:35,681 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:35,681 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:35,885 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:35,885 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:35,886 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:35,886 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-09-11 12:10:35,886 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:35,886 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2087331855] [2020-09-11 12:10:35,887 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:35,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:36,273 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:36,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2087331855] [2020-09-11 12:10:36,273 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [350997538] [2020-09-11 12:10:36,274 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 [2020-09-11 12:10:36,339 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:36,339 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:36,340 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:36,341 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:36,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-09-11 12:10:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:36,401 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:36,402 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 12:10:36,402 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1150840493] [2020-09-11 12:10:36,402 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 12:10:36,402 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:36,402 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 12:10:36,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:10:36,403 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-09-11 12:10:38,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:38,177 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-09-11 12:10:38,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-09-11 12:10:38,178 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 12:10:38,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:38,179 INFO L225 Difference]: With dead ends: 96 [2020-09-11 12:10:38,179 INFO L226 Difference]: Without dead ends: 91 [2020-09-11 12:10:38,180 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 [2020-09-11 12:10:38,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-09-11 12:10:38,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-09-11 12:10:38,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-09-11 12:10:38,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-09-11 12:10:38,182 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-09-11 12:10:38,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:38,182 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-09-11 12:10:38,182 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 12:10:38,182 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-09-11 12:10:38,182 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:38,182 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:38,182 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:38,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:38,384 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:38,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:38,384 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-09-11 12:10:38,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:38,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093074671] [2020-09-11 12:10:38,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:38,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:38,874 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:38,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093074671] [2020-09-11 12:10:38,875 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1970475477] [2020-09-11 12:10:38,875 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 [2020-09-11 12:10:38,941 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-09-11 12:10:38,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:38,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:38,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:38,954 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:38,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:38,954 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 12:10:38,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725300489] [2020-09-11 12:10:38,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:38,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:38,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:38,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:38,955 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-09-11 12:10:39,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:39,691 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-09-11 12:10:39,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-09-11 12:10:39,692 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 12:10:39,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:39,692 INFO L225 Difference]: With dead ends: 102 [2020-09-11 12:10:39,693 INFO L226 Difference]: Without dead ends: 96 [2020-09-11 12:10:39,693 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 [2020-09-11 12:10:39,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-09-11 12:10:39,694 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-09-11 12:10:39,694 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:10:39,695 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-09-11 12:10:39,695 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-09-11 12:10:39,695 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:39,695 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-09-11 12:10:39,695 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:39,695 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-09-11 12:10:39,695 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:39,695 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:39,696 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:39,896 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-09-11 12:10:39,897 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:39,897 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:39,897 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-09-11 12:10:39,897 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:39,898 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1638671446] [2020-09-11 12:10:39,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:39,909 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:40,394 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:40,394 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1638671446] [2020-09-11 12:10:40,395 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1299645193] [2020-09-11 12:10:40,395 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 [2020-09-11 12:10:40,468 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-09-11 12:10:40,469 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:40,470 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:40,470 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:40,501 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:40,514 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:40,515 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:40,515 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 12:10:40,515 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2085928076] [2020-09-11 12:10:40,515 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 12:10:40,515 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:40,515 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 12:10:40,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:10:40,516 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-09-11 12:10:41,386 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:41,386 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-09-11 12:10:41,387 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-09-11 12:10:41,387 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 12:10:41,388 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:41,388 INFO L225 Difference]: With dead ends: 122 [2020-09-11 12:10:41,388 INFO L226 Difference]: Without dead ends: 116 [2020-09-11 12:10:41,388 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 [2020-09-11 12:10:41,389 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-09-11 12:10:41,390 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-09-11 12:10:41,390 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-09-11 12:10:41,391 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-09-11 12:10:41,391 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-09-11 12:10:41,391 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:41,391 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-09-11 12:10:41,391 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 12:10:41,391 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-09-11 12:10:41,391 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:41,391 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:41,391 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:41,592 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-09-11 12:10:41,592 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:41,593 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:41,593 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-09-11 12:10:41,593 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:41,594 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482413188] [2020-09-11 12:10:41,594 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:41,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:42,075 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:42,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482413188] [2020-09-11 12:10:42,076 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [858353586] [2020-09-11 12:10:42,076 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 [2020-09-11 12:10:42,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:42,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:42,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:42,157 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:42,157 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:42,157 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 12:10:42,157 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [782840816] [2020-09-11 12:10:42,158 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:42,158 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:42,158 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:42,158 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:42,158 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-09-11 12:10:43,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:43,029 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-09-11 12:10:43,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-09-11 12:10:43,031 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 12:10:43,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:43,031 INFO L225 Difference]: With dead ends: 123 [2020-09-11 12:10:43,031 INFO L226 Difference]: Without dead ends: 117 [2020-09-11 12:10:43,032 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 [2020-09-11 12:10:43,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-09-11 12:10:43,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-09-11 12:10:43,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-09-11 12:10:43,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-09-11 12:10:43,034 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-09-11 12:10:43,034 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:43,035 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-09-11 12:10:43,035 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:43,035 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-09-11 12:10:43,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:43,035 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:43,035 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:43,235 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-09-11 12:10:43,236 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:43,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:43,236 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-09-11 12:10:43,237 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:43,237 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2046213989] [2020-09-11 12:10:43,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:43,247 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:43,730 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:43,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2046213989] [2020-09-11 12:10:43,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1671861449] [2020-09-11 12:10:43,731 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 [2020-09-11 12:10:43,796 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-09-11 12:10:43,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:43,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:43,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:43,830 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:43,846 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:43,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:43,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 12:10:43,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868456893] [2020-09-11 12:10:43,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 12:10:43,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:43,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 12:10:43,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:10:43,847 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-09-11 12:10:44,807 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:44,807 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-09-11 12:10:44,808 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-09-11 12:10:44,809 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-09-11 12:10:44,809 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:44,809 INFO L225 Difference]: With dead ends: 139 [2020-09-11 12:10:44,809 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 12:10:44,810 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 [2020-09-11 12:10:44,810 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 12:10:44,812 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-09-11 12:10:44,812 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-09-11 12:10:44,813 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-09-11 12:10:44,813 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-09-11 12:10:44,813 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:44,813 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-09-11 12:10:44,813 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-09-11 12:10:44,813 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-09-11 12:10:44,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:44,813 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:44,814 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:45,022 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-09-11 12:10:45,022 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:45,023 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:45,023 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-09-11 12:10:45,023 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:45,024 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2020436256] [2020-09-11 12:10:45,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:45,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:45,468 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:45,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2020436256] [2020-09-11 12:10:45,468 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2113426451] [2020-09-11 12:10:45,469 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 [2020-09-11 12:10:45,536 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-09-11 12:10:45,536 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:45,537 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:45,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:45,555 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:45,555 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:45,555 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-09-11 12:10:45,555 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814699234] [2020-09-11 12:10:45,556 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-09-11 12:10:45,556 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:45,556 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-09-11 12:10:45,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-09-11 12:10:45,556 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-09-11 12:10:46,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-09-11 12:10:46,569 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-09-11 12:10:46,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-09-11 12:10:46,570 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-09-11 12:10:46,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-09-11 12:10:46,571 INFO L225 Difference]: With dead ends: 139 [2020-09-11 12:10:46,571 INFO L226 Difference]: Without dead ends: 133 [2020-09-11 12:10:46,571 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 [2020-09-11 12:10:46,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-09-11 12:10:46,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-09-11 12:10:46,574 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-09-11 12:10:46,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-09-11 12:10:46,574 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-09-11 12:10:46,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-09-11 12:10:46,574 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-09-11 12:10:46,574 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-09-11 12:10:46,575 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-09-11 12:10:46,575 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-09-11 12:10:46,575 INFO L414 BasicCegarLoop]: Found error trace [2020-09-11 12:10:46,575 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-09-11 12:10:46,777 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-09-11 12:10:46,777 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-09-11 12:10:46,778 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-09-11 12:10:46,778 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-09-11 12:10:46,778 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-09-11 12:10:46,778 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [107291302] [2020-09-11 12:10:46,779 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-09-11 12:10:46,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-09-11 12:10:47,226 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:47,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [107291302] [2020-09-11 12:10:47,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701750256] [2020-09-11 12:10:47,227 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 [2020-09-11 12:10:47,293 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-09-11 12:10:47,294 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-09-11 12:10:47,295 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-09-11 12:10:47,295 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-09-11 12:10:47,328 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-09-11 12:10:47,346 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-09-11 12:10:47,346 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-09-11 12:10:47,346 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-09-11 12:10:47,346 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963823675] [2020-09-11 12:10:47,347 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-09-11 12:10:47,347 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-09-11 12:10:47,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-09-11 12:10:47,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-09-11 12:10:47,347 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. Received shutdown request... [2020-09-11 12:10:48,215 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-09-11 12:10:48,416 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-09-11 12:10:48,416 WARN L544 AbstractCegarLoop]: Verification canceled [2020-09-11 12:10:48,421 WARN L228 ceAbstractionStarter]: Timeout [2020-09-11 12:10:48,422 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.09 12:10:48 BasicIcfg [2020-09-11 12:10:48,422 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-09-11 12:10:48,424 INFO L168 Benchmark]: Toolchain (without parser) took 250776.29 ms. Allocated memory was 140.0 MB in the beginning and 183.0 MB in the end (delta: 43.0 MB). Free memory was 101.0 MB in the beginning and 109.2 MB in the end (delta: -8.2 MB). Peak memory consumption was 34.8 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:48,426 INFO L168 Benchmark]: CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. [2020-09-11 12:10:48,426 INFO L168 Benchmark]: CACSL2BoogieTranslator took 777.83 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 100.3 MB in the beginning and 164.3 MB in the end (delta: -64.0 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:48,427 INFO L168 Benchmark]: Boogie Procedure Inliner took 69.78 ms. Allocated memory is still 204.5 MB. Free memory was 164.3 MB in the beginning and 162.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:48,430 INFO L168 Benchmark]: Boogie Preprocessor took 36.26 ms. Allocated memory is still 204.5 MB. Free memory was 162.3 MB in the beginning and 161.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:48,432 INFO L168 Benchmark]: RCFGBuilder took 472.94 ms. Allocated memory is still 204.5 MB. Free memory was 161.0 MB in the beginning and 141.0 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:48,432 INFO L168 Benchmark]: TraceAbstraction took 249407.95 ms. Allocated memory was 204.5 MB in the beginning and 183.0 MB in the end (delta: -21.5 MB). Free memory was 140.3 MB in the beginning and 109.2 MB in the end (delta: 31.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. [2020-09-11 12:10:48,434 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.25 ms. Allocated memory is still 140.0 MB. Free memory was 120.3 MB in the beginning and 120.1 MB in the end (delta: 209.8 kB). There was no memory consumed. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 777.83 ms. Allocated memory was 140.0 MB in the beginning and 204.5 MB in the end (delta: 64.5 MB). Free memory was 100.3 MB in the beginning and 164.3 MB in the end (delta: -64.0 MB). Peak memory consumption was 25.3 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 69.78 ms. Allocated memory is still 204.5 MB. Free memory was 164.3 MB in the beginning and 162.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 36.26 ms. Allocated memory is still 204.5 MB. Free memory was 162.3 MB in the beginning and 161.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 472.94 ms. Allocated memory is still 204.5 MB. Free memory was 161.0 MB in the beginning and 141.0 MB in the end (delta: 20.0 MB). Peak memory consumption was 20.0 MB. Max. memory is 7.1 GB. * TraceAbstraction took 249407.95 ms. Allocated memory was 204.5 MB in the beginning and 183.0 MB in the end (delta: -21.5 MB). Free memory was 140.3 MB in the beginning and 109.2 MB in the end (delta: 31.1 MB). Peak memory consumption was 9.6 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.5s, 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 - TimeoutResultAtElement [Line: 703]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 703). Cancelled while BasicCegarLoop was constructing difference of abstraction (77states) and FLOYD_HOARE automaton (currently 23 states, 24 states before enhancement),while PredicateComparison was comparing new predicate (quantifier-free) to 44 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 249.2s, OverallIterations: 204, TraceHistogramMax: 10, AutomataDifference: 139.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.5s, HoareTripleCheckerStatistics: 3254 SDtfs, 11101 SDslu, 20021 SDs, 0 SdLazy, 21662 SolverSat, 12354 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 27.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 10754 GetRequests, 3571 SyntacticMatches, 199 SemanticMatches, 6983 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 64563 ImplicationChecksByTransitivity, 142.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=90occurred in iteration=195, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.5s AutomataMinimizationTime, 203 MinimizatonAttempts, 4891 StatesRemovedByMinimization, 202 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.8s SsaConstructionTime, 5.9s SatisfiabilityAnalysisTime, 50.8s InterpolantComputationTime, 8198 NumberOfCodeBlocks, 8198 NumberOfCodeBlocksAsserted, 1013 NumberOfCheckSat, 7795 ConstructedInterpolants, 0 QuantifiedInterpolants, 725063 SizeOfPredicates, 2485 NumberOfNonLiveVariables, 25161 ConjunctsInSsa, 3283 ConjunctsInUnsatCore, 403 InterpolantComputations, 5 PerfectInterpolantSequences, 0/14982 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 could not prove your program: Timeout Completed graceful shutdown