/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/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-2.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-c7e336b [2020-10-05 23:12:07,992 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-05 23:12:07,995 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-05 23:12:08,037 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-05 23:12:08,037 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-05 23:12:08,045 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-05 23:12:08,047 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-05 23:12:08,052 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-05 23:12:08,056 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-05 23:12:08,057 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-05 23:12:08,058 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-05 23:12:08,059 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-05 23:12:08,060 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-05 23:12:08,061 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-05 23:12:08,061 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-05 23:12:08,064 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-05 23:12:08,066 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-05 23:12:08,069 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-05 23:12:08,070 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-05 23:12:08,077 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-05 23:12:08,080 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-05 23:12:08,082 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-05 23:12:08,083 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-05 23:12:08,083 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-05 23:12:08,088 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-05 23:12:08,088 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-05 23:12:08,088 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-05 23:12:08,091 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-05 23:12:08,092 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-05 23:12:08,094 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-05 23:12:08,094 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-05 23:12:08,095 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-05 23:12:08,096 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-05 23:12:08,096 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-05 23:12:08,098 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-05 23:12:08,098 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-05 23:12:08,099 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-05 23:12:08,099 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-05 23:12:08,099 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-05 23:12:08,100 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-05 23:12:08,101 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-05 23:12:08,102 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA.epf [2020-10-05 23:12:08,147 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-05 23:12:08,147 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-05 23:12:08,150 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-05 23:12:08,150 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-05 23:12:08,150 INFO L138 SettingsManager]: * Use SBE=true [2020-10-05 23:12:08,150 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-05 23:12:08,151 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-05 23:12:08,151 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-05 23:12:08,151 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-05 23:12:08,151 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-05 23:12:08,152 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-05 23:12:08,153 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-05 23:12:08,153 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-05 23:12:08,153 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-05 23:12:08,154 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-05 23:12:08,154 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-05 23:12:08,154 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-05 23:12:08,154 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-05 23:12:08,154 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-05 23:12:08,154 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-05 23:12:08,155 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-05 23:12:08,155 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:12:08,155 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-05 23:12:08,155 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-05 23:12:08,155 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-05 23:12:08,156 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-05 23:12:08,156 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-05 23:12:08,156 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-05 23:12:08,156 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-05 23:12:08,459 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-05 23:12:08,471 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-05 23:12:08,474 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-05 23:12:08,476 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-05 23:12:08,477 INFO L275 PluginConnector]: CDTParser initialized [2020-10-05 23:12:08,478 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-05 23:12:08,540 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bb7b3b8a/7236d094faab4e83947634aca3c2e61b/FLAG93cf121b5 [2020-10-05 23:12:09,113 INFO L306 CDTParser]: Found 1 translation units. [2020-10-05 23:12:09,114 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-2.i [2020-10-05 23:12:09,129 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bb7b3b8a/7236d094faab4e83947634aca3c2e61b/FLAG93cf121b5 [2020-10-05 23:12:09,436 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2bb7b3b8a/7236d094faab4e83947634aca3c2e61b [2020-10-05 23:12:09,445 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-05 23:12:09,447 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-05 23:12:09,448 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-05 23:12:09,449 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-05 23:12:09,452 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-05 23:12:09,453 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:12:09" (1/1) ... [2020-10-05 23:12:09,456 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@79546eef and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:09, skipping insertion in model container [2020-10-05 23:12:09,456 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 11:12:09" (1/1) ... [2020-10-05 23:12:09,464 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-05 23:12:09,507 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-05 23:12:09,987 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:12:10,005 INFO L203 MainTranslator]: Completed pre-run [2020-10-05 23:12:10,076 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-05 23:12:10,164 INFO L208 MainTranslator]: Completed translation [2020-10-05 23:12:10,165 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10 WrapperNode [2020-10-05 23:12:10,168 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-05 23:12:10,169 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-05 23:12:10,169 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-05 23:12:10,169 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-05 23:12:10,178 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,194 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,214 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-05 23:12:10,215 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-05 23:12:10,215 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-05 23:12:10,215 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-05 23:12:10,223 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,223 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,227 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,227 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,233 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,238 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,240 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... [2020-10-05 23:12:10,243 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-05 23:12:10,243 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-05 23:12:10,243 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-05 23:12:10,244 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-05 23:12:10,245 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-05 23:12:10,310 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-05 23:12:10,310 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-05 23:12:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-05 23:12:10,311 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-05 23:12:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-05 23:12:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-05 23:12:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-05 23:12:10,311 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-05 23:12:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-05 23:12:10,312 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-05 23:12:10,312 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-05 23:12:10,319 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-05 23:12:10,637 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-05 23:12:10,638 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-05 23:12:10,640 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:12:10 BoogieIcfgContainer [2020-10-05 23:12:10,640 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-05 23:12:10,642 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-05 23:12:10,642 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-05 23:12:10,645 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-05 23:12:10,645 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 11:12:09" (1/3) ... [2020-10-05 23:12:10,646 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ffd892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:12:10, skipping insertion in model container [2020-10-05 23:12:10,646 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 11:12:10" (2/3) ... [2020-10-05 23:12:10,647 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@67ffd892 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 11:12:10, skipping insertion in model container [2020-10-05 23:12:10,647 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 11:12:10" (3/3) ... [2020-10-05 23:12:10,649 INFO L109 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-10-05 23:12:10,659 WARN L146 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-05 23:12:10,659 INFO L157 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-05 23:12:10,666 INFO L169 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-05 23:12:10,667 INFO L340 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-05 23:12:10,694 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,695 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,695 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,696 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,696 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,696 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,697 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,697 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,697 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,698 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,698 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,698 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,699 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,699 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,699 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,700 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,700 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,700 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,701 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,701 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,701 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,702 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,702 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,702 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,703 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,703 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,704 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,707 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,708 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,708 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,709 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,717 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,717 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,718 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,718 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-05 23:12:10,731 INFO L251 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-05 23:12:10,748 INFO L375 AbstractCegarLoop]: Interprodecural is true [2020-10-05 23:12:10,749 INFO L376 AbstractCegarLoop]: Hoare is true [2020-10-05 23:12:10,749 INFO L377 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-05 23:12:10,749 INFO L378 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-05 23:12:10,749 INFO L379 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-05 23:12:10,750 INFO L380 AbstractCegarLoop]: Difference is false [2020-10-05 23:12:10,750 INFO L381 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-05 23:12:10,750 INFO L385 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-05 23:12:10,763 INFO L152 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 57 places, 55 transitions, 120 flow [2020-10-05 23:12:10,765 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 23:12:10,807 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 23:12:10,807 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 23:12:10,813 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. [2020-10-05 23:12:10,816 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 57 places, 55 transitions, 120 flow [2020-10-05 23:12:10,835 INFO L129 PetriNetUnfolder]: 5/53 cut-off events. [2020-10-05 23:12:10,836 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-05 23:12:10,837 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. [2020-10-05 23:12:10,839 INFO L158 etLargeBlockEncoding]: Number of co-enabled transitions 924 [2020-10-05 23:12:10,840 INFO L182 etLargeBlockEncoding]: Variable Check. [2020-10-05 23:12:11,885 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 55 [2020-10-05 23:12:12,109 INFO L206 etLargeBlockEncoding]: Checked pairs total: 851 [2020-10-05 23:12:12,109 INFO L214 etLargeBlockEncoding]: Total number of compositions: 42 [2020-10-05 23:12:12,113 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-05 23:12:12,125 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-05 23:12:12,127 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-05 23:12:12,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-05 23:12:12,135 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:12,136 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-05 23:12:12,136 INFO L427 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:12,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:12,142 INFO L82 PathProgramCache]: Analyzing trace with hash -1798862799, now seen corresponding path program 1 times [2020-10-05 23:12:12,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:12,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [910062850] [2020-10-05 23:12:12,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:12,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:12,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:12,370 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [910062850] [2020-10-05 23:12:12,371 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:12,372 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-05 23:12:12,372 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [477853713] [2020-10-05 23:12:12,377 INFO L459 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-05 23:12:12,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:12,393 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-05 23:12:12,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-05 23:12:12,397 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-05 23:12:12,472 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:12,472 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-10-05 23:12:12,473 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-05 23:12:12,474 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-05 23:12:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:12,487 INFO L225 Difference]: With dead ends: 75 [2020-10-05 23:12:12,488 INFO L226 Difference]: Without dead ends: 42 [2020-10-05 23:12:12,489 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 [2020-10-05 23:12:12,509 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-10-05 23:12:12,528 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-10-05 23:12:12,530 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:12:12,531 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-10-05 23:12:12,533 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-10-05 23:12:12,533 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:12,533 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-10-05 23:12:12,533 INFO L480 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-05 23:12:12,534 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-10-05 23:12:12,534 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-05 23:12:12,535 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:12,535 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:12,535 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-05 23:12:12,535 INFO L427 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:12,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:12,536 INFO L82 PathProgramCache]: Analyzing trace with hash -1777031324, now seen corresponding path program 1 times [2020-10-05 23:12:12,536 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:12,536 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615012995] [2020-10-05 23:12:12,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:12,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:12,654 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:12,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615012995] [2020-10-05 23:12:12,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:12,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-05 23:12:12,655 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1630100549] [2020-10-05 23:12:12,657 INFO L459 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-05 23:12:12,657 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:12,657 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-05 23:12:12,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-05 23:12:12,658 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-10-05 23:12:12,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:12,692 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-10-05 23:12:12,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-10-05 23:12:12,692 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-05 23:12:12,693 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:12,694 INFO L225 Difference]: With dead ends: 56 [2020-10-05 23:12:12,694 INFO L226 Difference]: Without dead ends: 50 [2020-10-05 23:12:12,695 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 [2020-10-05 23:12:12,696 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-10-05 23:12:12,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-10-05 23:12:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:12:12,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-10-05 23:12:12,703 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-10-05 23:12:12,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:12,704 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-10-05 23:12:12,704 INFO L480 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-05 23:12:12,704 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-10-05 23:12:12,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:12:12,705 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:12,706 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:12,706 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-05 23:12:12,706 INFO L427 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:12,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:12,707 INFO L82 PathProgramCache]: Analyzing trace with hash 1669374595, now seen corresponding path program 1 times [2020-10-05 23:12:12,707 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:12,707 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1525184257] [2020-10-05 23:12:12,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:12,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:12,783 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:12,783 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1525184257] [2020-10-05 23:12:12,784 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:12,784 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 23:12:12,784 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1331527382] [2020-10-05 23:12:12,785 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:12:12,785 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:12,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:12:12,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:12:12,786 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-10-05 23:12:12,860 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:12,861 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-10-05 23:12:12,861 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:12:12,861 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 23:12:12,862 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:12,863 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:12:12,863 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:12:12,864 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 [2020-10-05 23:12:12,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:12:12,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-10-05 23:12:12,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:12,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 23:12:12,873 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-10-05 23:12:12,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:12,874 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 23:12:12,874 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:12:12,874 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 23:12:12,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:12:12,875 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:12,875 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:12,876 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-05 23:12:12,876 INFO L427 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:12,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:12,876 INFO L82 PathProgramCache]: Analyzing trace with hash 1669391335, now seen corresponding path program 2 times [2020-10-05 23:12:12,876 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:12,877 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753037328] [2020-10-05 23:12:12,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:12,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:12,960 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:12,961 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753037328] [2020-10-05 23:12:12,961 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:12,961 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 23:12:12,962 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787089868] [2020-10-05 23:12:12,962 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:12:12,963 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:12,963 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:12:12,963 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:12:12,963 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-10-05 23:12:13,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:13,044 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 23:12:13,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:12:13,044 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 23:12:13,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:13,045 INFO L225 Difference]: With dead ends: 54 [2020-10-05 23:12:13,046 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 23:12:13,046 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 [2020-10-05 23:12:13,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 23:12:13,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 23:12:13,051 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 23:12:13,051 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-10-05 23:12:13,052 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-10-05 23:12:13,052 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:13,052 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-10-05 23:12:13,052 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:12:13,052 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-10-05 23:12:13,053 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-05 23:12:13,053 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:13,053 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:13,053 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-05 23:12:13,054 INFO L427 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:13,054 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:13,054 INFO L82 PathProgramCache]: Analyzing trace with hash 447691255, now seen corresponding path program 3 times [2020-10-05 23:12:13,054 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:13,055 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [666306584] [2020-10-05 23:12:13,055 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:13,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:13,128 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [666306584] [2020-10-05 23:12:13,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-05 23:12:13,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-05 23:12:13,129 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092462616] [2020-10-05 23:12:13,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-05 23:12:13,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:13,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-05 23:12:13,131 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-10-05 23:12:13,131 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-10-05 23:12:13,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:13,227 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-10-05 23:12:13,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-05 23:12:13,228 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-05 23:12:13,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:13,228 INFO L225 Difference]: With dead ends: 57 [2020-10-05 23:12:13,229 INFO L226 Difference]: Without dead ends: 51 [2020-10-05 23:12:13,229 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 [2020-10-05 23:12:13,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-10-05 23:12:13,234 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-10-05 23:12:13,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 23:12:13,235 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 23:12:13,235 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-10-05 23:12:13,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:13,235 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 23:12:13,235 INFO L480 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-05 23:12:13,236 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 23:12:13,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:13,236 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:13,237 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:13,237 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-10-05 23:12:13,237 INFO L427 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:13,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:13,238 INFO L82 PathProgramCache]: Analyzing trace with hash 211540140, now seen corresponding path program 4 times [2020-10-05 23:12:13,238 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:13,238 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [796579508] [2020-10-05 23:12:13,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:13,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [796579508] [2020-10-05 23:12:13,303 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139087306] [2020-10-05 23:12:13,303 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:13,362 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:13,362 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:13,367 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:13,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:13,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:13,433 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,434 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:13,434 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 23:12:13,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1206207770] [2020-10-05 23:12:13,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:13,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:13,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:13,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:13,436 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-10-05 23:12:13,571 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:13,572 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-10-05 23:12:13,573 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:12:13,573 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 23:12:13,573 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:13,574 INFO L225 Difference]: With dead ends: 48 [2020-10-05 23:12:13,574 INFO L226 Difference]: Without dead ends: 43 [2020-10-05 23:12:13,574 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 [2020-10-05 23:12:13,575 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-10-05 23:12:13,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-10-05 23:12:13,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-10-05 23:12:13,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-10-05 23:12:13,583 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-10-05 23:12:13,583 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:13,584 INFO L479 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-10-05 23:12:13,584 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:13,584 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-10-05 23:12:13,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:13,584 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:13,585 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:13,796 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-10-05 23:12:13,797 INFO L427 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:13,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:13,797 INFO L82 PathProgramCache]: Analyzing trace with hash 976950295, now seen corresponding path program 5 times [2020-10-05 23:12:13,797 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:13,798 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1402576489] [2020-10-05 23:12:13,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:13,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:13,885 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,885 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1402576489] [2020-10-05 23:12:13,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1663844345] [2020-10-05 23:12:13,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:13,931 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:13,931 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:13,932 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:13,934 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:13,947 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:13,948 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:13,948 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 23:12:13,948 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1066499800] [2020-10-05 23:12:13,949 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:12:13,949 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:13,949 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:12:13,949 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:12:13,949 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand 7 states. [2020-10-05 23:12:14,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:14,039 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-10-05 23:12:14,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-05 23:12:14,040 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 23:12:14,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:14,041 INFO L225 Difference]: With dead ends: 54 [2020-10-05 23:12:14,041 INFO L226 Difference]: Without dead ends: 48 [2020-10-05 23:12:14,042 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 [2020-10-05 23:12:14,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-05 23:12:14,053 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-10-05 23:12:14,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:12:14,054 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-10-05 23:12:14,054 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-10-05 23:12:14,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:14,055 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-10-05 23:12:14,055 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:12:14,055 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-10-05 23:12:14,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:14,056 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:14,056 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:14,256 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:14,257 INFO L427 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:14,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:14,258 INFO L82 PathProgramCache]: Analyzing trace with hash 993037435, now seen corresponding path program 6 times [2020-10-05 23:12:14,258 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:14,259 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1023507773] [2020-10-05 23:12:14,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:14,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:14,332 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:14,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1023507773] [2020-10-05 23:12:14,333 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738675429] [2020-10-05 23:12:14,333 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:14,386 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 23:12:14,386 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:14,387 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:14,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:14,421 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:14,436 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:14,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:14,437 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 23:12:14,437 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109404018] [2020-10-05 23:12:14,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:14,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:14,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:14,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:14,438 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-10-05 23:12:14,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:14,544 INFO L93 Difference]: Finished difference Result 58 states and 133 transitions. [2020-10-05 23:12:14,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-05 23:12:14,545 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 23:12:14,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:14,545 INFO L225 Difference]: With dead ends: 58 [2020-10-05 23:12:14,546 INFO L226 Difference]: Without dead ends: 52 [2020-10-05 23:12:14,546 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 17 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=90, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:14,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-10-05 23:12:14,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 40. [2020-10-05 23:12:14,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-10-05 23:12:14,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-10-05 23:12:14,551 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 11 [2020-10-05 23:12:14,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:14,551 INFO L479 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-10-05 23:12:14,551 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:14,551 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-10-05 23:12:14,552 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:14,552 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:14,552 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:14,762 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:14,763 INFO L427 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:14,763 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:14,764 INFO L82 PathProgramCache]: Analyzing trace with hash 993527545, now seen corresponding path program 7 times [2020-10-05 23:12:14,764 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:14,764 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708202206] [2020-10-05 23:12:14,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:14,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:14,833 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:14,833 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708202206] [2020-10-05 23:12:14,834 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [486895766] [2020-10-05 23:12:14,834 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:14,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:14,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:14,902 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:14,930 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:14,930 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:14,931 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-10-05 23:12:14,931 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1942213232] [2020-10-05 23:12:14,932 INFO L459 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-05 23:12:14,932 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:14,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-05 23:12:14,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-10-05 23:12:14,933 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-10-05 23:12:15,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:15,096 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 23:12:15,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:15,097 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-05 23:12:15,098 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:15,098 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:12:15,099 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 23:12:15,100 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 [2020-10-05 23:12:15,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 23:12:15,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 46. [2020-10-05 23:12:15,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:15,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-10-05 23:12:15,114 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-10-05 23:12:15,115 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:15,115 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-10-05 23:12:15,115 INFO L480 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-05 23:12:15,118 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-10-05 23:12:15,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-05 23:12:15,119 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:15,119 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:15,333 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:15,334 INFO L427 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:15,334 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:15,334 INFO L82 PathProgramCache]: Analyzing trace with hash 993544285, now seen corresponding path program 8 times [2020-10-05 23:12:15,334 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:15,334 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111089585] [2020-10-05 23:12:15,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:15,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:15,404 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:15,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111089585] [2020-10-05 23:12:15,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84466706] [2020-10-05 23:12:15,405 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:15,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:15,451 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:15,452 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-05 23:12:15,453 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:15,472 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:15,486 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:15,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:15,487 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-10-05 23:12:15,487 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364433072] [2020-10-05 23:12:15,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:15,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:15,488 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:15,488 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:15,488 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-10-05 23:12:15,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:15,661 INFO L93 Difference]: Finished difference Result 62 states and 145 transitions. [2020-10-05 23:12:15,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:12:15,662 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-05 23:12:15,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:15,663 INFO L225 Difference]: With dead ends: 62 [2020-10-05 23:12:15,663 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 23:12:15,663 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 [2020-10-05 23:12:15,664 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 23:12:15,667 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 43. [2020-10-05 23:12:15,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-10-05 23:12:15,668 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-10-05 23:12:15,668 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-10-05 23:12:15,668 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:15,668 INFO L479 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-10-05 23:12:15,668 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:15,668 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-10-05 23:12:15,669 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:15,669 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:15,669 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:15,881 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-05 23:12:15,882 INFO L427 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:15,882 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:15,883 INFO L82 PathProgramCache]: Analyzing trace with hash -2048766974, now seen corresponding path program 9 times [2020-10-05 23:12:15,883 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:15,883 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804858345] [2020-10-05 23:12:15,884 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:15,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:15,945 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:15,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804858345] [2020-10-05 23:12:15,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [927131610] [2020-10-05 23:12:15,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:15,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-05 23:12:15,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:15,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:12:15,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:16,016 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:16,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:16,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 23:12:16,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887077755] [2020-10-05 23:12:16,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:16,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:16,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:16,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:16,018 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand 8 states. [2020-10-05 23:12:16,131 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:16,131 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-10-05 23:12:16,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 23:12:16,132 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 23:12:16,132 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:16,133 INFO L225 Difference]: With dead ends: 64 [2020-10-05 23:12:16,133 INFO L226 Difference]: Without dead ends: 58 [2020-10-05 23:12:16,134 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 [2020-10-05 23:12:16,134 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-10-05 23:12:16,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-10-05 23:12:16,137 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 23:12:16,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-10-05 23:12:16,137 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-10-05 23:12:16,138 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:16,138 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-10-05 23:12:16,138 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:16,138 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-10-05 23:12:16,139 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:16,139 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:16,139 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:16,348 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:16,349 INFO L427 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:16,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:16,349 INFO L82 PathProgramCache]: Analyzing trace with hash -2032679834, now seen corresponding path program 10 times [2020-10-05 23:12:16,350 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:16,350 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1954727494] [2020-10-05 23:12:16,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:16,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:16,410 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:16,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1954727494] [2020-10-05 23:12:16,411 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689180048] [2020-10-05 23:12:16,411 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:16,482 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:16,483 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:16,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:12:16,491 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:16,519 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:16,536 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:16,537 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:16,537 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 23:12:16,537 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [438048203] [2020-10-05 23:12:16,538 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:16,539 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:16,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:16,540 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:16,540 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand 9 states. [2020-10-05 23:12:16,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:16,698 INFO L93 Difference]: Finished difference Result 61 states and 141 transitions. [2020-10-05 23:12:16,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:12:16,699 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 23:12:16,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:16,700 INFO L225 Difference]: With dead ends: 61 [2020-10-05 23:12:16,700 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 23:12:16,700 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 [2020-10-05 23:12:16,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 23:12:16,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 44. [2020-10-05 23:12:16,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 23:12:16,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 23:12:16,707 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 12 [2020-10-05 23:12:16,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:16,707 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 23:12:16,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:16,708 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 23:12:16,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:16,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:16,708 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:16,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:16,910 INFO L427 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:16,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:16,910 INFO L82 PathProgramCache]: Analyzing trace with hash -2032189724, now seen corresponding path program 11 times [2020-10-05 23:12:16,911 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:16,911 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089873286] [2020-10-05 23:12:16,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:16,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:16,967 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:16,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089873286] [2020-10-05 23:12:16,967 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [657187163] [2020-10-05 23:12:16,968 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:17,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:17,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:17,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:12:17,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:17,050 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:17,050 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:17,050 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-10-05 23:12:17,051 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856362050] [2020-10-05 23:12:17,051 INFO L459 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-05 23:12:17,051 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:17,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-05 23:12:17,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-10-05 23:12:17,052 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 8 states. [2020-10-05 23:12:17,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:17,185 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 23:12:17,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:17,185 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-05 23:12:17,186 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:17,186 INFO L225 Difference]: With dead ends: 77 [2020-10-05 23:12:17,186 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:12:17,187 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 [2020-10-05 23:12:17,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:12:17,192 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 48. [2020-10-05 23:12:17,192 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 23:12:17,192 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 121 transitions. [2020-10-05 23:12:17,192 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 121 transitions. Word has length 12 [2020-10-05 23:12:17,193 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:17,193 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 121 transitions. [2020-10-05 23:12:17,193 INFO L480 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-05 23:12:17,193 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 121 transitions. [2020-10-05 23:12:17,194 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:17,194 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:17,194 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:17,398 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-05 23:12:17,399 INFO L427 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:17,399 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:17,400 INFO L82 PathProgramCache]: Analyzing trace with hash -2032172984, now seen corresponding path program 12 times [2020-10-05 23:12:17,400 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:17,400 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713668844] [2020-10-05 23:12:17,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:17,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:17,451 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:17,451 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713668844] [2020-10-05 23:12:17,452 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1730987084] [2020-10-05 23:12:17,452 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:17,501 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-05 23:12:17,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:17,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:17,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:17,529 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:17,529 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:17,530 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 23:12:17,530 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917891200] [2020-10-05 23:12:17,531 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:17,531 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:17,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:17,532 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:17,532 INFO L87 Difference]: Start difference. First operand 48 states and 121 transitions. Second operand 9 states. [2020-10-05 23:12:17,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:17,696 INFO L93 Difference]: Finished difference Result 56 states and 133 transitions. [2020-10-05 23:12:17,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:12:17,696 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 23:12:17,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:17,697 INFO L225 Difference]: With dead ends: 56 [2020-10-05 23:12:17,697 INFO L226 Difference]: Without dead ends: 48 [2020-10-05 23:12:17,697 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=77, Invalid=163, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:17,698 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-10-05 23:12:17,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 37. [2020-10-05 23:12:17,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 37 states. [2020-10-05 23:12:17,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-10-05 23:12:17,700 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-10-05 23:12:17,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:17,700 INFO L479 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-10-05 23:12:17,701 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:17,701 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-10-05 23:12:17,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-05 23:12:17,701 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:17,701 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:17,910 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:17,911 INFO L427 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:17,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:17,911 INFO L82 PathProgramCache]: Analyzing trace with hash 735118070, now seen corresponding path program 13 times [2020-10-05 23:12:17,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:17,912 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [984282716] [2020-10-05 23:12:17,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:17,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:17,973 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:17,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [984282716] [2020-10-05 23:12:17,973 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587057766] [2020-10-05 23:12:17,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:18,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:18,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-05 23:12:18,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:18,042 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:18,055 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:18,055 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:18,055 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-05 23:12:18,056 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2095771702] [2020-10-05 23:12:18,057 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:18,057 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:18,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:18,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:18,058 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand 9 states. [2020-10-05 23:12:18,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:18,237 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-10-05 23:12:18,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:18,238 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-05 23:12:18,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:18,239 INFO L225 Difference]: With dead ends: 60 [2020-10-05 23:12:18,239 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 23:12:18,240 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 [2020-10-05 23:12:18,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 23:12:18,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-10-05 23:12:18,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:18,243 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 23:12:18,243 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-10-05 23:12:18,243 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:18,243 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 23:12:18,244 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:18,244 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 23:12:18,244 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:18,244 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:18,244 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:18,453 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-05 23:12:18,454 INFO L427 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:18,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:18,455 INFO L82 PathProgramCache]: Analyzing trace with hash 1427163243, now seen corresponding path program 14 times [2020-10-05 23:12:18,455 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:18,455 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643286250] [2020-10-05 23:12:18,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:18,465 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:18,534 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:18,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643286250] [2020-10-05 23:12:18,535 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1740439278] [2020-10-05 23:12:18,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:18,586 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:18,586 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:18,587 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:18,588 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:18,605 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:18,616 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:18,616 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:18,616 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:12:18,617 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1539809716] [2020-10-05 23:12:18,617 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:18,617 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:18,617 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:18,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:18,618 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 10 states. [2020-10-05 23:12:18,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:18,813 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-10-05 23:12:18,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:18,813 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 23:12:18,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:18,814 INFO L225 Difference]: With dead ends: 54 [2020-10-05 23:12:18,814 INFO L226 Difference]: Without dead ends: 49 [2020-10-05 23:12:18,815 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:12:18,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-10-05 23:12:18,817 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-10-05 23:12:18,818 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-10-05 23:12:18,818 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-10-05 23:12:18,818 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-10-05 23:12:18,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:18,818 INFO L479 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-10-05 23:12:18,819 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:18,819 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-10-05 23:12:18,819 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:18,819 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:18,819 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:19,028 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-05 23:12:19,029 INFO L427 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:19,029 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:19,029 INFO L82 PathProgramCache]: Analyzing trace with hash -1748588394, now seen corresponding path program 15 times [2020-10-05 23:12:19,030 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:19,030 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26825364] [2020-10-05 23:12:19,030 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:19,039 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:19,097 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:19,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26825364] [2020-10-05 23:12:19,098 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110423302] [2020-10-05 23:12:19,098 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:19,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 23:12:19,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:19,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:19,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:19,159 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:19,160 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:19,160 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 23:12:19,160 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462268014] [2020-10-05 23:12:19,161 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:19,161 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:19,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:19,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:19,162 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 9 states. [2020-10-05 23:12:19,271 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:19,272 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-10-05 23:12:19,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-05 23:12:19,272 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 23:12:19,272 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:19,273 INFO L225 Difference]: With dead ends: 60 [2020-10-05 23:12:19,273 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 23:12:19,274 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:19,274 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 23:12:19,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-10-05 23:12:19,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:19,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-10-05 23:12:19,279 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-10-05 23:12:19,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:19,279 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-10-05 23:12:19,279 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:19,279 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-10-05 23:12:19,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:19,280 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:19,280 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:19,480 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-05 23:12:19,481 INFO L427 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:19,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:19,481 INFO L82 PathProgramCache]: Analyzing trace with hash 826251258, now seen corresponding path program 16 times [2020-10-05 23:12:19,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:19,482 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396769421] [2020-10-05 23:12:19,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:19,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:19,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396769421] [2020-10-05 23:12:19,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581889305] [2020-10-05 23:12:19,548 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:19,592 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:19,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:19,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:19,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:19,609 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:19,621 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:19,621 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:19,621 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:12:19,622 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1916868470] [2020-10-05 23:12:19,622 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:19,622 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:19,622 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:19,622 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:19,623 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 10 states. [2020-10-05 23:12:19,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:19,748 INFO L93 Difference]: Finished difference Result 66 states and 151 transitions. [2020-10-05 23:12:19,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-05 23:12:19,749 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 23:12:19,749 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:19,750 INFO L225 Difference]: With dead ends: 66 [2020-10-05 23:12:19,750 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 23:12:19,751 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 [2020-10-05 23:12:19,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 23:12:19,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 44. [2020-10-05 23:12:19,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-10-05 23:12:19,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-10-05 23:12:19,754 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 13 [2020-10-05 23:12:19,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:19,754 INFO L479 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-10-05 23:12:19,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:19,755 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-10-05 23:12:19,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:19,755 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:19,755 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:19,965 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-05 23:12:19,966 INFO L427 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:19,966 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:19,966 INFO L82 PathProgramCache]: Analyzing trace with hash 1297246968, now seen corresponding path program 17 times [2020-10-05 23:12:19,967 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:19,967 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1444845940] [2020-10-05 23:12:19,967 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:19,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:20,027 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:20,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1444845940] [2020-10-05 23:12:20,028 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1874813720] [2020-10-05 23:12:20,028 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:20,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 23:12:20,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:20,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:20,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:20,095 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:20,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:20,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 23:12:20,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1653344490] [2020-10-05 23:12:20,097 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:20,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:20,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:20,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:20,097 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 9 states. [2020-10-05 23:12:20,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:20,276 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-10-05 23:12:20,279 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:12:20,279 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 23:12:20,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:20,280 INFO L225 Difference]: With dead ends: 67 [2020-10-05 23:12:20,280 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:12:20,281 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 [2020-10-05 23:12:20,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:12:20,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-10-05 23:12:20,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-10-05 23:12:20,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-10-05 23:12:20,285 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-10-05 23:12:20,285 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:20,285 INFO L479 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-10-05 23:12:20,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:20,285 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-10-05 23:12:20,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:20,286 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:20,286 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:20,487 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:20,488 INFO L427 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:20,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:20,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1313334108, now seen corresponding path program 18 times [2020-10-05 23:12:20,489 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:20,489 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794135665] [2020-10-05 23:12:20,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:20,497 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:20,550 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:20,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794135665] [2020-10-05 23:12:20,550 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779669279] [2020-10-05 23:12:20,550 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:20,595 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 23:12:20,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:20,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:20,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:20,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:20,632 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:20,633 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:20,633 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:12:20,633 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210492693] [2020-10-05 23:12:20,634 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:20,634 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:20,634 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:20,634 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:20,634 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-10-05 23:12:20,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:20,823 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-10-05 23:12:20,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 23:12:20,824 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 23:12:20,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:20,824 INFO L225 Difference]: With dead ends: 69 [2020-10-05 23:12:20,825 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 23:12:20,825 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 47 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:12:20,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 23:12:20,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 46. [2020-10-05 23:12:20,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-10-05 23:12:20,828 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 13 [2020-10-05 23:12:20,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:20,828 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-10-05 23:12:20,828 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:20,828 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-10-05 23:12:20,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:20,829 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:20,829 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:21,036 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:21,037 INFO L427 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:21,037 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:21,037 INFO L82 PathProgramCache]: Analyzing trace with hash 1313824218, now seen corresponding path program 19 times [2020-10-05 23:12:21,038 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:21,038 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734922373] [2020-10-05 23:12:21,038 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:21,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:21,091 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:21,091 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734922373] [2020-10-05 23:12:21,092 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1364444293] [2020-10-05 23:12:21,092 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:21,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:21,136 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:21,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:21,154 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:21,155 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:21,155 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-10-05 23:12:21,155 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [125791227] [2020-10-05 23:12:21,156 INFO L459 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-05 23:12:21,156 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:21,156 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-05 23:12:21,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-10-05 23:12:21,157 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 9 states. [2020-10-05 23:12:21,367 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:21,367 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 23:12:21,368 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:21,368 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-05 23:12:21,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:21,369 INFO L225 Difference]: With dead ends: 88 [2020-10-05 23:12:21,369 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 23:12:21,370 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=128, Invalid=252, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:12:21,370 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 23:12:21,372 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 52. [2020-10-05 23:12:21,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:12:21,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-10-05 23:12:21,373 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-10-05 23:12:21,373 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:21,373 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-10-05 23:12:21,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-05 23:12:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-10-05 23:12:21,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-05 23:12:21,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:21,374 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:21,582 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:21,583 INFO L427 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:21,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:21,583 INFO L82 PathProgramCache]: Analyzing trace with hash 1313840958, now seen corresponding path program 20 times [2020-10-05 23:12:21,583 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:21,584 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [741690053] [2020-10-05 23:12:21,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:21,636 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:21,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [741690053] [2020-10-05 23:12:21,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429480687] [2020-10-05 23:12:21,637 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:21,684 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:21,684 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:21,685 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-05 23:12:21,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:21,706 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:21,722 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:21,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:21,723 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-10-05 23:12:21,723 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [417365378] [2020-10-05 23:12:21,723 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:21,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:21,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:21,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:21,724 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 10 states. [2020-10-05 23:12:21,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:21,980 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-10-05 23:12:21,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:21,985 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-05 23:12:21,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:21,986 INFO L225 Difference]: With dead ends: 69 [2020-10-05 23:12:21,986 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:12:21,986 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 [2020-10-05 23:12:21,987 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:12:21,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 49. [2020-10-05 23:12:21,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 23:12:21,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-10-05 23:12:21,990 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-10-05 23:12:21,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:21,990 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-10-05 23:12:21,990 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:21,990 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-10-05 23:12:21,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:21,992 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:21,992 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:22,192 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-05 23:12:22,193 INFO L427 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:22,193 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:22,193 INFO L82 PathProgramCache]: Analyzing trace with hash -1770024511, now seen corresponding path program 21 times [2020-10-05 23:12:22,194 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:22,194 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963924428] [2020-10-05 23:12:22,194 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:22,202 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:22,292 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:22,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963924428] [2020-10-05 23:12:22,292 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [698474794] [2020-10-05 23:12:22,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:22,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 23:12:22,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:22,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:22,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:22,358 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:22,358 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:22,358 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 23:12:22,359 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157028502] [2020-10-05 23:12:22,359 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:22,359 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:22,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:22,359 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:22,360 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand 10 states. [2020-10-05 23:12:22,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:22,494 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-10-05 23:12:22,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:22,495 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 23:12:22,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:22,496 INFO L225 Difference]: With dead ends: 74 [2020-10-05 23:12:22,496 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:12:22,496 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 [2020-10-05 23:12:22,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:12:22,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-10-05 23:12:22,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 23:12:22,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 23:12:22,500 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 23:12:22,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:22,500 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 23:12:22,500 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:22,500 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 23:12:22,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:22,501 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:22,501 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:22,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-05 23:12:22,709 INFO L427 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:22,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:22,709 INFO L82 PathProgramCache]: Analyzing trace with hash 804815141, now seen corresponding path program 22 times [2020-10-05 23:12:22,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:22,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [518544544] [2020-10-05 23:12:22,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:22,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:22,784 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:22,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [518544544] [2020-10-05 23:12:22,784 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1485148640] [2020-10-05 23:12:22,785 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:22,839 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:22,839 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:22,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:22,841 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:22,859 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:22,877 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:22,877 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:22,877 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 23:12:22,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [608784725] [2020-10-05 23:12:22,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:22,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:22,878 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:22,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:22,879 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 23:12:23,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:23,063 INFO L93 Difference]: Finished difference Result 71 states and 165 transitions. [2020-10-05 23:12:23,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 23:12:23,064 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 23:12:23,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:23,065 INFO L225 Difference]: With dead ends: 71 [2020-10-05 23:12:23,065 INFO L226 Difference]: Without dead ends: 65 [2020-10-05 23:12:23,065 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:12:23,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 65 states. [2020-10-05 23:12:23,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 65 to 50. [2020-10-05 23:12:23,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:23,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 23:12:23,068 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 23:12:23,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:23,069 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 23:12:23,069 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:23,069 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 23:12:23,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:23,069 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:23,069 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:23,269 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-05 23:12:23,270 INFO L427 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:23,270 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:23,271 INFO L82 PathProgramCache]: Analyzing trace with hash 1275810851, now seen corresponding path program 23 times [2020-10-05 23:12:23,271 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:23,272 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [936386232] [2020-10-05 23:12:23,272 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:23,280 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:23,343 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:23,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [936386232] [2020-10-05 23:12:23,343 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [663012489] [2020-10-05 23:12:23,343 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:23,390 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-05 23:12:23,390 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:23,391 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:23,392 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:23,405 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:23,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:23,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 23:12:23,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198995426] [2020-10-05 23:12:23,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:23,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:23,407 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:23,407 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:23,407 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 23:12:23,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:23,580 INFO L93 Difference]: Finished difference Result 68 states and 159 transitions. [2020-10-05 23:12:23,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:12:23,581 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 23:12:23,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:23,582 INFO L225 Difference]: With dead ends: 68 [2020-10-05 23:12:23,582 INFO L226 Difference]: Without dead ends: 62 [2020-10-05 23:12:23,583 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 [2020-10-05 23:12:23,583 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-05 23:12:23,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-10-05 23:12:23,585 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 23:12:23,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 23:12:23,586 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-10-05 23:12:23,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:23,586 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 23:12:23,586 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:23,586 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 23:12:23,586 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:23,587 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:23,587 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:23,797 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-05 23:12:23,798 INFO L427 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:23,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:23,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1291897991, now seen corresponding path program 24 times [2020-10-05 23:12:23,799 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:23,799 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303218457] [2020-10-05 23:12:23,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:23,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:23,862 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:23,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303218457] [2020-10-05 23:12:23,862 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1119588278] [2020-10-05 23:12:23,862 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:23,917 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-05 23:12:23,918 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:23,918 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:23,919 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:23,942 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:23,957 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:23,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:23,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 23:12:23,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1962509293] [2020-10-05 23:12:23,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:23,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:23,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:23,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=85, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:23,958 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 11 states. [2020-10-05 23:12:24,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:24,205 INFO L93 Difference]: Finished difference Result 67 states and 157 transitions. [2020-10-05 23:12:24,205 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:24,205 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 23:12:24,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:24,206 INFO L225 Difference]: With dead ends: 67 [2020-10-05 23:12:24,206 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:12:24,207 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 [2020-10-05 23:12:24,207 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:12:24,209 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 50. [2020-10-05 23:12:24,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:24,209 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 23:12:24,210 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 14 [2020-10-05 23:12:24,210 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:24,210 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 23:12:24,210 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:24,210 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 23:12:24,210 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:24,210 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:24,210 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:24,418 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-05 23:12:24,419 INFO L427 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:24,419 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:24,419 INFO L82 PathProgramCache]: Analyzing trace with hash 1292388101, now seen corresponding path program 25 times [2020-10-05 23:12:24,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:24,420 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [655230709] [2020-10-05 23:12:24,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:24,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:24,489 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:24,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [655230709] [2020-10-05 23:12:24,490 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449855687] [2020-10-05 23:12:24,490 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:24,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:24,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:24,537 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:24,552 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:24,552 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-10-05 23:12:24,552 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1175139586] [2020-10-05 23:12:24,553 INFO L459 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-05 23:12:24,553 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:24,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-05 23:12:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-10-05 23:12:24,553 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 10 states. [2020-10-05 23:12:24,777 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:24,777 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 23:12:24,777 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:24,777 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-10-05 23:12:24,778 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:24,778 INFO L225 Difference]: With dead ends: 83 [2020-10-05 23:12:24,778 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:12:24,779 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:12:24,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:12:24,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 54. [2020-10-05 23:12:24,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:12:24,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 137 transitions. [2020-10-05 23:12:24,782 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 137 transitions. Word has length 14 [2020-10-05 23:12:24,782 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:24,782 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 137 transitions. [2020-10-05 23:12:24,782 INFO L480 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-05 23:12:24,782 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 137 transitions. [2020-10-05 23:12:24,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:24,783 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:24,783 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:24,991 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:24,992 INFO L427 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:24,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:24,992 INFO L82 PathProgramCache]: Analyzing trace with hash 1292404841, now seen corresponding path program 26 times [2020-10-05 23:12:24,992 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:24,993 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859266596] [2020-10-05 23:12:24,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:25,001 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:25,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:25,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859266596] [2020-10-05 23:12:25,057 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1474327449] [2020-10-05 23:12:25,057 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:25,112 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:25,113 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:25,114 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:25,115 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:25,180 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:25,180 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:25,181 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 23:12:25,181 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [272326443] [2020-10-05 23:12:25,181 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:25,181 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:25,181 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:25,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:25,182 INFO L87 Difference]: Start difference. First operand 54 states and 137 transitions. Second operand 11 states. [2020-10-05 23:12:25,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:25,460 INFO L93 Difference]: Finished difference Result 62 states and 149 transitions. [2020-10-05 23:12:25,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:25,461 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 23:12:25,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:25,462 INFO L225 Difference]: With dead ends: 62 [2020-10-05 23:12:25,462 INFO L226 Difference]: Without dead ends: 54 [2020-10-05 23:12:25,462 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:12:25,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-05 23:12:25,464 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 41. [2020-10-05 23:12:25,464 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 41 states. [2020-10-05 23:12:25,465 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-10-05 23:12:25,465 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-10-05 23:12:25,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:25,466 INFO L479 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-10-05 23:12:25,466 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:25,466 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-10-05 23:12:25,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-05 23:12:25,467 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:25,467 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:25,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-05 23:12:25,676 INFO L427 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:25,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:25,676 INFO L82 PathProgramCache]: Analyzing trace with hash 2074380341, now seen corresponding path program 27 times [2020-10-05 23:12:25,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:25,677 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1230503464] [2020-10-05 23:12:25,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:25,685 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:25,739 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:25,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1230503464] [2020-10-05 23:12:25,740 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1486227378] [2020-10-05 23:12:25,740 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:25,798 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-05 23:12:25,798 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:25,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-05 23:12:25,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:25,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:25,828 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:25,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:25,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-05 23:12:25,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1064309215] [2020-10-05 23:12:25,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:25,829 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:25,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:25,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:25,830 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand 11 states. [2020-10-05 23:12:26,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:26,103 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-10-05 23:12:26,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:26,103 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-05 23:12:26,103 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:26,104 INFO L225 Difference]: With dead ends: 68 [2020-10-05 23:12:26,104 INFO L226 Difference]: Without dead ends: 63 [2020-10-05 23:12:26,105 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 [2020-10-05 23:12:26,105 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-10-05 23:12:26,106 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-10-05 23:12:26,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:12:26,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 23:12:26,107 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-10-05 23:12:26,107 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:26,108 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 23:12:26,108 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:26,108 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 23:12:26,108 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:26,108 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:26,108 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:26,309 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-05 23:12:26,309 INFO L427 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:26,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:26,310 INFO L82 PathProgramCache]: Analyzing trace with hash 1409860714, now seen corresponding path program 28 times [2020-10-05 23:12:26,310 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:26,310 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1996944885] [2020-10-05 23:12:26,311 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:26,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:26,377 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:26,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1996944885] [2020-10-05 23:12:26,378 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872722333] [2020-10-05 23:12:26,378 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:26,418 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:26,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:26,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:26,419 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:26,443 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:26,454 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:26,455 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:26,455 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:26,455 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1743025808] [2020-10-05 23:12:26,456 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:26,456 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:26,456 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:26,456 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:26,457 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 12 states. [2020-10-05 23:12:26,741 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:26,741 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-10-05 23:12:26,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:26,742 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:26,742 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:26,743 INFO L225 Difference]: With dead ends: 60 [2020-10-05 23:12:26,743 INFO L226 Difference]: Without dead ends: 55 [2020-10-05 23:12:26,744 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:26,744 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-10-05 23:12:26,745 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-10-05 23:12:26,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-10-05 23:12:26,746 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-10-05 23:12:26,746 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-10-05 23:12:26,746 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:26,746 INFO L479 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-10-05 23:12:26,746 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:26,747 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-10-05 23:12:26,747 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:26,747 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:26,747 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:26,955 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:26,956 INFO L427 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:26,956 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:26,956 INFO L82 PathProgramCache]: Analyzing trace with hash -1061217963, now seen corresponding path program 29 times [2020-10-05 23:12:26,957 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:26,957 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565729557] [2020-10-05 23:12:26,958 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:26,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:27,038 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:27,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565729557] [2020-10-05 23:12:27,038 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1393639673] [2020-10-05 23:12:27,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:27,089 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 23:12:27,089 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:27,090 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:27,091 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:27,105 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:27,106 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:27,106 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 23:12:27,106 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479902211] [2020-10-05 23:12:27,107 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:27,107 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:27,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:27,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:27,107 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand 11 states. [2020-10-05 23:12:27,268 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:27,268 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-10-05 23:12:27,269 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-05 23:12:27,269 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:12:27,269 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:27,269 INFO L225 Difference]: With dead ends: 66 [2020-10-05 23:12:27,269 INFO L226 Difference]: Without dead ends: 60 [2020-10-05 23:12:27,270 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 [2020-10-05 23:12:27,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-10-05 23:12:27,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-10-05 23:12:27,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:27,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-10-05 23:12:27,272 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-10-05 23:12:27,272 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:27,272 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-10-05 23:12:27,273 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:27,273 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-10-05 23:12:27,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:27,273 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:27,273 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:27,481 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:27,482 INFO L427 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:27,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:27,482 INFO L82 PathProgramCache]: Analyzing trace with hash -541474887, now seen corresponding path program 30 times [2020-10-05 23:12:27,482 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:27,483 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1093270716] [2020-10-05 23:12:27,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:27,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:27,568 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:27,568 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1093270716] [2020-10-05 23:12:27,569 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135347858] [2020-10-05 23:12:27,569 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:27,624 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 23:12:27,624 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:27,625 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:27,626 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:27,643 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:27,655 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:27,655 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:27,655 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:27,656 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [276400090] [2020-10-05 23:12:27,656 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:27,656 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:27,656 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:27,656 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:27,657 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 12 states. [2020-10-05 23:12:27,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:27,810 INFO L93 Difference]: Finished difference Result 74 states and 169 transitions. [2020-10-05 23:12:27,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-05 23:12:27,810 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:27,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:27,811 INFO L225 Difference]: With dead ends: 74 [2020-10-05 23:12:27,811 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:12:27,812 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=112, Invalid=268, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:12:27,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:12:27,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 48. [2020-10-05 23:12:27,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-10-05 23:12:27,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 117 transitions. [2020-10-05 23:12:27,814 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 117 transitions. Word has length 15 [2020-10-05 23:12:27,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:27,815 INFO L479 AbstractCegarLoop]: Abstraction has 48 states and 117 transitions. [2020-10-05 23:12:27,815 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:27,815 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 117 transitions. [2020-10-05 23:12:27,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:27,815 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:27,815 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:28,023 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-05 23:12:28,024 INFO L427 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:28,024 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:28,024 INFO L82 PathProgramCache]: Analyzing trace with hash 1113836343, now seen corresponding path program 31 times [2020-10-05 23:12:28,024 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:28,025 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439841021] [2020-10-05 23:12:28,025 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:28,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:28,104 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:28,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439841021] [2020-10-05 23:12:28,105 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [293670337] [2020-10-05 23:12:28,105 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:28,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:28,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:28,157 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:28,170 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:28,171 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:28,171 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 23:12:28,171 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [932758054] [2020-10-05 23:12:28,172 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:28,172 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:28,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:28,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:28,172 INFO L87 Difference]: Start difference. First operand 48 states and 117 transitions. Second operand 11 states. [2020-10-05 23:12:28,358 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:28,358 INFO L93 Difference]: Finished difference Result 75 states and 173 transitions. [2020-10-05 23:12:28,359 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:28,359 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:12:28,359 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:28,360 INFO L225 Difference]: With dead ends: 75 [2020-10-05 23:12:28,360 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 23:12:28,361 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:12:28,361 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 23:12:28,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 51. [2020-10-05 23:12:28,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-10-05 23:12:28,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-10-05 23:12:28,364 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 15 [2020-10-05 23:12:28,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:28,364 INFO L479 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-10-05 23:12:28,364 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:28,365 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-10-05 23:12:28,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:28,365 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:28,365 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:28,574 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:28,575 INFO L427 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:28,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:28,575 INFO L82 PathProgramCache]: Analyzing trace with hash -606291301, now seen corresponding path program 32 times [2020-10-05 23:12:28,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:28,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [189305811] [2020-10-05 23:12:28,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:28,585 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:28,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:28,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [189305811] [2020-10-05 23:12:28,654 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [262623973] [2020-10-05 23:12:28,654 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:28,697 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:28,698 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:28,698 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:28,699 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:28,721 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:28,743 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:28,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:28,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:28,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [611428834] [2020-10-05 23:12:28,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:28,745 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:28,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:28,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:28,745 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand 12 states. [2020-10-05 23:12:28,996 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:28,996 INFO L93 Difference]: Finished difference Result 79 states and 181 transitions. [2020-10-05 23:12:28,997 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:28,997 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:28,997 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:28,998 INFO L225 Difference]: With dead ends: 79 [2020-10-05 23:12:28,998 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:12:28,998 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 [2020-10-05 23:12:28,999 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:12:29,000 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 50. [2020-10-05 23:12:29,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:29,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 123 transitions. [2020-10-05 23:12:29,001 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 123 transitions. Word has length 15 [2020-10-05 23:12:29,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:29,001 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 123 transitions. [2020-10-05 23:12:29,001 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:29,001 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 123 transitions. [2020-10-05 23:12:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:29,002 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:29,002 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:29,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-05 23:12:29,210 INFO L427 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:29,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:29,211 INFO L82 PathProgramCache]: Analyzing trace with hash -135295591, now seen corresponding path program 33 times [2020-10-05 23:12:29,211 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:29,211 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138381511] [2020-10-05 23:12:29,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:29,220 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:29,307 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:29,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138381511] [2020-10-05 23:12:29,308 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1022048229] [2020-10-05 23:12:29,308 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:29,382 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 23:12:29,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:29,384 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:29,385 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:29,399 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:29,399 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:29,399 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 23:12:29,400 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1294520711] [2020-10-05 23:12:29,400 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:29,400 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:29,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:29,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:29,401 INFO L87 Difference]: Start difference. First operand 50 states and 123 transitions. Second operand 11 states. [2020-10-05 23:12:29,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:29,703 INFO L93 Difference]: Finished difference Result 79 states and 183 transitions. [2020-10-05 23:12:29,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:12:29,704 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:12:29,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:29,705 INFO L225 Difference]: With dead ends: 79 [2020-10-05 23:12:29,705 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:12:29,706 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 [2020-10-05 23:12:29,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:12:29,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 53. [2020-10-05 23:12:29,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 23:12:29,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 131 transitions. [2020-10-05 23:12:29,710 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 131 transitions. Word has length 15 [2020-10-05 23:12:29,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:29,710 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 131 transitions. [2020-10-05 23:12:29,710 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:29,711 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 131 transitions. [2020-10-05 23:12:29,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:29,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:29,711 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:29,923 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:29,923 INFO L427 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:29,924 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:29,924 INFO L82 PathProgramCache]: Analyzing trace with hash -119208451, now seen corresponding path program 34 times [2020-10-05 23:12:29,924 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:29,924 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139041585] [2020-10-05 23:12:29,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:29,931 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:29,995 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:29,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139041585] [2020-10-05 23:12:29,995 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [102110564] [2020-10-05 23:12:29,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:30,037 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:30,037 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:30,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:30,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:30,056 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:30,066 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:30,066 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:30,066 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:30,066 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180969077] [2020-10-05 23:12:30,067 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:30,067 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:30,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:30,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=103, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:30,067 INFO L87 Difference]: Start difference. First operand 53 states and 131 transitions. Second operand 12 states. [2020-10-05 23:12:30,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:30,355 INFO L93 Difference]: Finished difference Result 76 states and 177 transitions. [2020-10-05 23:12:30,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:30,356 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:30,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:30,356 INFO L225 Difference]: With dead ends: 76 [2020-10-05 23:12:30,356 INFO L226 Difference]: Without dead ends: 70 [2020-10-05 23:12:30,357 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=178, Invalid=422, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:30,357 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-05 23:12:30,359 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2020-10-05 23:12:30,359 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:12:30,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-10-05 23:12:30,360 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 15 [2020-10-05 23:12:30,360 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:30,360 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-10-05 23:12:30,360 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:30,360 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-10-05 23:12:30,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:30,361 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:30,361 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:30,568 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-05 23:12:30,569 INFO L427 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:30,569 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:30,569 INFO L82 PathProgramCache]: Analyzing trace with hash -118718341, now seen corresponding path program 35 times [2020-10-05 23:12:30,570 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:30,570 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282727406] [2020-10-05 23:12:30,570 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:30,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:30,633 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:30,633 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282727406] [2020-10-05 23:12:30,634 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1152129598] [2020-10-05 23:12:30,634 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:30,685 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 23:12:30,685 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:30,686 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:30,686 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:30,731 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:30,731 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:30,731 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-10-05 23:12:30,731 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815368409] [2020-10-05 23:12:30,732 INFO L459 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-05 23:12:30,732 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:30,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-05 23:12:30,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-10-05 23:12:30,732 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 11 states. [2020-10-05 23:12:30,993 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:30,994 INFO L93 Difference]: Finished difference Result 96 states and 227 transitions. [2020-10-05 23:12:30,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:30,994 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-10-05 23:12:30,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:30,995 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:12:30,996 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:12:30,996 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 [2020-10-05 23:12:30,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:12:30,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 58. [2020-10-05 23:12:30,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:30,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 149 transitions. [2020-10-05 23:12:30,999 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 149 transitions. Word has length 15 [2020-10-05 23:12:31,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:31,000 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 149 transitions. [2020-10-05 23:12:31,000 INFO L480 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-05 23:12:31,000 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 149 transitions. [2020-10-05 23:12:31,000 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-10-05 23:12:31,000 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:31,000 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:31,209 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-05 23:12:31,209 INFO L427 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:31,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:31,210 INFO L82 PathProgramCache]: Analyzing trace with hash -118701601, now seen corresponding path program 36 times [2020-10-05 23:12:31,210 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:31,210 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1378749281] [2020-10-05 23:12:31,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:31,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:31,303 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:31,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1378749281] [2020-10-05 23:12:31,304 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2060091871] [2020-10-05 23:12:31,304 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:31,380 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 23:12:31,380 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:31,381 INFO L263 TraceCheckSpWp]: Trace formula consists of 99 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-05 23:12:31,383 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:31,417 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:31,433 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:31,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:31,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-10-05 23:12:31,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [148721805] [2020-10-05 23:12:31,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:31,435 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:31,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:31,435 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:31,436 INFO L87 Difference]: Start difference. First operand 58 states and 149 transitions. Second operand 12 states. [2020-10-05 23:12:31,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:31,899 INFO L93 Difference]: Finished difference Result 77 states and 183 transitions. [2020-10-05 23:12:31,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:31,900 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-10-05 23:12:31,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:31,901 INFO L225 Difference]: With dead ends: 77 [2020-10-05 23:12:31,901 INFO L226 Difference]: Without dead ends: 69 [2020-10-05 23:12:31,902 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:12:31,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 69 states. [2020-10-05 23:12:31,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 69 to 55. [2020-10-05 23:12:31,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 23:12:31,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-10-05 23:12:31,905 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-10-05 23:12:31,906 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:31,906 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-10-05 23:12:31,906 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:31,906 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-10-05 23:12:31,907 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:31,907 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:31,907 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:32,116 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-05 23:12:32,116 INFO L427 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:32,117 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:32,117 INFO L82 PathProgramCache]: Analyzing trace with hash -186489920, now seen corresponding path program 37 times [2020-10-05 23:12:32,117 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:32,117 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047352730] [2020-10-05 23:12:32,117 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:32,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:32,209 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:32,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047352730] [2020-10-05 23:12:32,210 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21227825] [2020-10-05 23:12:32,210 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:32,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:32,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:32,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:32,265 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:32,265 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:32,265 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 23:12:32,266 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2007832720] [2020-10-05 23:12:32,266 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:32,266 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:32,266 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:32,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:32,267 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand 12 states. [2020-10-05 23:12:32,440 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:32,441 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-05 23:12:32,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:12:32,441 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:12:32,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:32,442 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:12:32,442 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:12:32,443 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:12:32,443 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:12:32,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-10-05 23:12:32,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:12:32,446 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 23:12:32,446 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 23:12:32,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:32,446 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 23:12:32,446 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:32,446 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 23:12:32,447 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:32,447 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:32,447 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:32,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-05 23:12:32,656 INFO L427 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:32,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:32,656 INFO L82 PathProgramCache]: Analyzing trace with hash 333253156, now seen corresponding path program 38 times [2020-10-05 23:12:32,656 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:32,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [799688078] [2020-10-05 23:12:32,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:32,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:32,762 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:32,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [799688078] [2020-10-05 23:12:32,762 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899512575] [2020-10-05 23:12:32,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:32,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:32,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:32,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:32,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:32,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:32,846 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:32,846 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:32,847 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:32,847 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023249940] [2020-10-05 23:12:32,847 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:32,847 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:32,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:32,848 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:32,848 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 23:12:33,099 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:33,099 INFO L93 Difference]: Finished difference Result 81 states and 189 transitions. [2020-10-05 23:12:33,100 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:33,100 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:33,100 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:33,101 INFO L225 Difference]: With dead ends: 81 [2020-10-05 23:12:33,101 INFO L226 Difference]: Without dead ends: 75 [2020-10-05 23:12:33,102 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=161, Invalid=391, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:12:33,102 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-05 23:12:33,105 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 56. [2020-10-05 23:12:33,105 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:33,105 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 23:12:33,106 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 23:12:33,106 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:33,106 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 23:12:33,106 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:33,106 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 23:12:33,106 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:33,107 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:33,107 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:33,318 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-05 23:12:33,319 INFO L427 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:33,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:33,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1988564386, now seen corresponding path program 39 times [2020-10-05 23:12:33,320 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:33,320 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060990571] [2020-10-05 23:12:33,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:33,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:33,399 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:33,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060990571] [2020-10-05 23:12:33,399 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296862461] [2020-10-05 23:12:33,400 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:33,462 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 23:12:33,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:33,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:33,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:33,486 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:33,486 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:33,486 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 23:12:33,486 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1035015810] [2020-10-05 23:12:33,487 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:33,487 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:33,487 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:33,487 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:33,487 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 23:12:33,737 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:33,737 INFO L93 Difference]: Finished difference Result 78 states and 183 transitions. [2020-10-05 23:12:33,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:33,738 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:12:33,738 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:33,739 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:12:33,739 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 23:12:33,739 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 [2020-10-05 23:12:33,740 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 23:12:33,741 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 57. [2020-10-05 23:12:33,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:12:33,741 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 23:12:33,742 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 23:12:33,742 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:33,742 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 23:12:33,742 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:33,742 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 23:12:33,742 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:33,743 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:33,743 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:33,943 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-05 23:12:33,944 INFO L427 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:33,944 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:33,944 INFO L82 PathProgramCache]: Analyzing trace with hash 268436742, now seen corresponding path program 40 times [2020-10-05 23:12:33,945 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:33,945 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119255904] [2020-10-05 23:12:33,945 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:33,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:34,033 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:34,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119255904] [2020-10-05 23:12:34,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [776662071] [2020-10-05 23:12:34,034 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:34,080 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:34,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:34,081 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:34,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:34,100 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:34,109 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:34,110 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:34,110 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:34,110 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344454916] [2020-10-05 23:12:34,111 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:34,111 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:34,111 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:34,111 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=124, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:34,111 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 23:12:34,391 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:34,392 INFO L93 Difference]: Finished difference Result 77 states and 181 transitions. [2020-10-05 23:12:34,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:34,392 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:34,392 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:34,393 INFO L225 Difference]: With dead ends: 77 [2020-10-05 23:12:34,393 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:12:34,394 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-10-05 23:12:34,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:12:34,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 56. [2020-10-05 23:12:34,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:34,397 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 23:12:34,397 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 23:12:34,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:34,397 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 23:12:34,397 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:34,398 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 23:12:34,398 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:34,398 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:34,398 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:34,599 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-05 23:12:34,600 INFO L427 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:34,600 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:34,600 INFO L82 PathProgramCache]: Analyzing trace with hash 739432452, now seen corresponding path program 41 times [2020-10-05 23:12:34,600 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:34,601 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [495877361] [2020-10-05 23:12:34,601 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:34,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:34,675 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:34,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [495877361] [2020-10-05 23:12:34,676 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377607420] [2020-10-05 23:12:34,676 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:34,720 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-05 23:12:34,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:34,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:34,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:34,739 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:34,739 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:34,740 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 23:12:34,745 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902821268] [2020-10-05 23:12:34,745 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:34,746 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:34,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:34,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:34,747 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 23:12:35,081 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:35,081 INFO L93 Difference]: Finished difference Result 74 states and 175 transitions. [2020-10-05 23:12:35,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:12:35,082 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:12:35,082 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:35,083 INFO L225 Difference]: With dead ends: 74 [2020-10-05 23:12:35,083 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:12:35,084 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:35,084 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:12:35,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 57. [2020-10-05 23:12:35,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:12:35,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 23:12:35,089 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-10-05 23:12:35,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:35,093 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 23:12:35,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:35,093 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 23:12:35,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:35,094 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:35,094 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:35,294 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:35,294 INFO L427 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:35,295 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:35,295 INFO L82 PathProgramCache]: Analyzing trace with hash 755519592, now seen corresponding path program 42 times [2020-10-05 23:12:35,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:35,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [958243802] [2020-10-05 23:12:35,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:35,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:35,367 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:35,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [958243802] [2020-10-05 23:12:35,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [680454149] [2020-10-05 23:12:35,367 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:35,407 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-05 23:12:35,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:35,408 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:35,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:35,425 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:35,436 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:35,436 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:35,436 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018368724] [2020-10-05 23:12:35,437 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:35,437 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:35,437 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:35,437 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=123, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:35,437 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-10-05 23:12:35,823 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:35,824 INFO L93 Difference]: Finished difference Result 73 states and 173 transitions. [2020-10-05 23:12:35,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:35,824 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:35,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:35,825 INFO L225 Difference]: With dead ends: 73 [2020-10-05 23:12:35,825 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 23:12:35,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=225, Invalid=531, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:12:35,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 23:12:35,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 56. [2020-10-05 23:12:35,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:35,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 23:12:35,829 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 16 [2020-10-05 23:12:35,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:35,829 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 23:12:35,829 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:35,829 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 23:12:35,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:35,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:35,830 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:36,038 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-05 23:12:36,039 INFO L427 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash 756009702, now seen corresponding path program 43 times [2020-10-05 23:12:36,040 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:36,040 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369693416] [2020-10-05 23:12:36,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:36,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:36,108 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:36,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369693416] [2020-10-05 23:12:36,109 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037853760] [2020-10-05 23:12:36,109 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:36,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:36,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:36,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:36,165 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:36,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:36,166 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-10-05 23:12:36,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [447002691] [2020-10-05 23:12:36,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-05 23:12:36,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:36,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-05 23:12:36,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-10-05 23:12:36,167 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 12 states. [2020-10-05 23:12:36,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:36,461 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-05 23:12:36,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:36,461 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-10-05 23:12:36,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:36,462 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:12:36,462 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:12:36,463 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:12:36,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:12:36,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 60. [2020-10-05 23:12:36,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 23:12:36,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 153 transitions. [2020-10-05 23:12:36,467 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 153 transitions. Word has length 16 [2020-10-05 23:12:36,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:36,467 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 153 transitions. [2020-10-05 23:12:36,467 INFO L480 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-05 23:12:36,467 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 153 transitions. [2020-10-05 23:12:36,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:36,468 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:36,468 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:36,677 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:36,678 INFO L427 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:36,678 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:36,678 INFO L82 PathProgramCache]: Analyzing trace with hash 756026442, now seen corresponding path program 44 times [2020-10-05 23:12:36,679 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:36,679 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1159187752] [2020-10-05 23:12:36,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:36,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:36,746 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:36,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1159187752] [2020-10-05 23:12:36,746 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [68837381] [2020-10-05 23:12:36,746 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:36,793 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:36,794 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:36,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:36,795 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:36,813 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:36,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:36,823 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:36,823 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:36,823 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904336454] [2020-10-05 23:12:36,824 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:36,824 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:36,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:36,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:36,824 INFO L87 Difference]: Start difference. First operand 60 states and 153 transitions. Second operand 13 states. [2020-10-05 23:12:37,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:37,219 INFO L93 Difference]: Finished difference Result 70 states and 169 transitions. [2020-10-05 23:12:37,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:12:37,220 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:37,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:37,221 INFO L225 Difference]: With dead ends: 70 [2020-10-05 23:12:37,221 INFO L226 Difference]: Without dead ends: 62 [2020-10-05 23:12:37,222 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:12:37,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-10-05 23:12:37,223 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 45. [2020-10-05 23:12:37,223 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-10-05 23:12:37,224 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-10-05 23:12:37,224 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-10-05 23:12:37,224 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:37,224 INFO L479 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-10-05 23:12:37,224 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:37,224 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-10-05 23:12:37,225 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-10-05 23:12:37,225 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:37,225 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:37,426 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-05 23:12:37,427 INFO L427 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:37,427 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:37,427 INFO L82 PathProgramCache]: Analyzing trace with hash 615233972, now seen corresponding path program 45 times [2020-10-05 23:12:37,427 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:37,428 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1470946819] [2020-10-05 23:12:37,428 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:37,435 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:37,495 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:37,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1470946819] [2020-10-05 23:12:37,495 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558431766] [2020-10-05 23:12:37,495 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:37,547 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-05 23:12:37,547 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:37,548 INFO L263 TraceCheckSpWp]: Trace formula consists of 104 conjuncts, 12 conjunts are in the unsatisfiable core [2020-10-05 23:12:37,549 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:37,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:37,579 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:37,579 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:37,580 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-10-05 23:12:37,580 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [402453291] [2020-10-05 23:12:37,580 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:37,580 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:37,581 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:37,581 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:37,581 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand 13 states. [2020-10-05 23:12:37,972 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:37,973 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-10-05 23:12:37,973 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:37,973 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-10-05 23:12:37,973 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:37,974 INFO L225 Difference]: With dead ends: 76 [2020-10-05 23:12:37,974 INFO L226 Difference]: Without dead ends: 71 [2020-10-05 23:12:37,975 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:12:37,975 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-10-05 23:12:37,977 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-10-05 23:12:37,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:37,977 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 23:12:37,978 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-10-05 23:12:37,978 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:37,978 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 23:12:37,978 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:37,978 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 23:12:37,978 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:37,979 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:37,979 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:38,186 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:38,186 INFO L427 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:38,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:38,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1961999529, now seen corresponding path program 46 times [2020-10-05 23:12:38,187 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:38,187 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793014798] [2020-10-05 23:12:38,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:38,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:38,269 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:38,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793014798] [2020-10-05 23:12:38,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [152644630] [2020-10-05 23:12:38,269 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:38,330 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:38,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:38,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:38,332 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:38,355 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:38,368 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:38,368 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:38,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:38,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254881918] [2020-10-05 23:12:38,369 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:38,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:38,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:38,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:38,371 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 14 states. [2020-10-05 23:12:38,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:38,773 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-10-05 23:12:38,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:38,774 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:38,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:38,774 INFO L225 Difference]: With dead ends: 66 [2020-10-05 23:12:38,774 INFO L226 Difference]: Without dead ends: 61 [2020-10-05 23:12:38,775 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:12:38,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-10-05 23:12:38,777 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-10-05 23:12:38,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-10-05 23:12:38,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-10-05 23:12:38,777 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-10-05 23:12:38,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:38,778 INFO L479 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-10-05 23:12:38,778 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:38,778 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-10-05 23:12:38,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:38,778 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:38,778 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:38,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-05 23:12:38,985 INFO L427 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:38,986 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:38,986 INFO L82 PathProgramCache]: Analyzing trace with hash -1923197356, now seen corresponding path program 47 times [2020-10-05 23:12:38,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:38,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1655151050] [2020-10-05 23:12:38,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:38,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:39,093 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:39,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1655151050] [2020-10-05 23:12:39,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [377347864] [2020-10-05 23:12:39,094 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:39,136 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:12:39,136 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:39,137 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:39,137 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:39,165 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:39,165 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:39,165 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:39,166 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203802651] [2020-10-05 23:12:39,166 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:39,166 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:39,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:39,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:39,167 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 13 states. [2020-10-05 23:12:39,338 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:39,339 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-10-05 23:12:39,339 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-05 23:12:39,339 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:39,340 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:39,342 INFO L225 Difference]: With dead ends: 72 [2020-10-05 23:12:39,343 INFO L226 Difference]: Without dead ends: 66 [2020-10-05 23:12:39,343 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 [2020-10-05 23:12:39,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-10-05 23:12:39,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-10-05 23:12:39,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:12:39,345 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-10-05 23:12:39,346 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-10-05 23:12:39,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:39,346 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-10-05 23:12:39,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:39,346 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-10-05 23:12:39,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:39,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:39,347 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:39,555 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-05 23:12:39,556 INFO L427 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:39,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:39,556 INFO L82 PathProgramCache]: Analyzing trace with hash -666307656, now seen corresponding path program 48 times [2020-10-05 23:12:39,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:39,557 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [419929407] [2020-10-05 23:12:39,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:39,564 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:39,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:39,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [419929407] [2020-10-05 23:12:39,661 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [581809682] [2020-10-05 23:12:39,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:39,727 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 23:12:39,727 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:39,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:39,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:39,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:39,765 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:39,765 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:39,766 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:39,766 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705118709] [2020-10-05 23:12:39,766 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:39,767 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:39,767 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:39,767 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:39,767 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand 14 states. [2020-10-05 23:12:40,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:40,011 INFO L93 Difference]: Finished difference Result 82 states and 187 transitions. [2020-10-05 23:12:40,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-05 23:12:40,012 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:40,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:40,013 INFO L225 Difference]: With dead ends: 82 [2020-10-05 23:12:40,013 INFO L226 Difference]: Without dead ends: 76 [2020-10-05 23:12:40,013 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 [2020-10-05 23:12:40,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-10-05 23:12:40,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 52. [2020-10-05 23:12:40,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-10-05 23:12:40,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 127 transitions. [2020-10-05 23:12:40,016 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 127 transitions. Word has length 17 [2020-10-05 23:12:40,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:40,016 INFO L479 AbstractCegarLoop]: Abstraction has 52 states and 127 transitions. [2020-10-05 23:12:40,016 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:40,017 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 127 transitions. [2020-10-05 23:12:40,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:40,018 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:40,019 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:40,219 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-05 23:12:40,219 INFO L427 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:40,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:40,220 INFO L82 PathProgramCache]: Analyzing trace with hash 949884854, now seen corresponding path program 49 times [2020-10-05 23:12:40,220 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:40,220 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [558520823] [2020-10-05 23:12:40,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:40,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:40,367 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:40,367 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [558520823] [2020-10-05 23:12:40,368 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [640269511] [2020-10-05 23:12:40,368 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:40,427 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:40,428 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:40,429 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:40,440 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:40,443 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:40,443 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:40,443 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1838379699] [2020-10-05 23:12:40,444 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:40,444 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:40,444 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:40,444 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:40,444 INFO L87 Difference]: Start difference. First operand 52 states and 127 transitions. Second operand 13 states. [2020-10-05 23:12:40,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:40,687 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-10-05 23:12:40,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:12:40,688 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:40,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:40,689 INFO L225 Difference]: With dead ends: 83 [2020-10-05 23:12:40,689 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:12:40,690 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 98 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:40,690 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:12:40,692 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-10-05 23:12:40,692 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-05 23:12:40,692 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-10-05 23:12:40,692 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-10-05 23:12:40,692 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:40,692 INFO L479 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-10-05 23:12:40,693 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:40,693 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-10-05 23:12:40,693 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:40,693 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:40,693 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:40,893 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-05 23:12:40,894 INFO L427 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:40,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:40,895 INFO L82 PathProgramCache]: Analyzing trace with hash 1469627930, now seen corresponding path program 50 times [2020-10-05 23:12:40,895 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:40,896 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347143516] [2020-10-05 23:12:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:40,901 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:41,002 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:41,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347143516] [2020-10-05 23:12:41,003 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [380227913] [2020-10-05 23:12:41,003 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:41,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:41,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:41,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:41,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:41,068 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:41,081 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:41,081 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:41,081 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:41,082 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332362726] [2020-10-05 23:12:41,082 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:41,082 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:41,082 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:41,082 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:41,083 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-10-05 23:12:41,368 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:41,369 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-10-05 23:12:41,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:41,373 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:41,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:41,373 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:12:41,373 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:12:41,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:12:41,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:12:41,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 54. [2020-10-05 23:12:41,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:12:41,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-10-05 23:12:41,376 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 17 [2020-10-05 23:12:41,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:41,376 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-10-05 23:12:41,376 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:41,376 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-10-05 23:12:41,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:41,377 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:41,377 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:41,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:41,586 INFO L427 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:41,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1170028136, now seen corresponding path program 51 times [2020-10-05 23:12:41,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:41,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070969027] [2020-10-05 23:12:41,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:41,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:41,680 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:41,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070969027] [2020-10-05 23:12:41,681 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [986207218] [2020-10-05 23:12:41,681 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:41,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 23:12:41,746 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:41,747 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:41,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:41,763 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:41,764 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:41,764 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:41,764 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1547506343] [2020-10-05 23:12:41,764 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:41,765 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:41,765 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:41,765 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:41,765 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 13 states. [2020-10-05 23:12:42,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:42,076 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-10-05 23:12:42,077 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:42,077 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:42,077 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:42,078 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:12:42,078 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:12:42,078 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:12:42,079 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:12:42,081 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-10-05 23:12:42,081 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:12:42,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-10-05 23:12:42,081 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-10-05 23:12:42,082 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:42,082 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-10-05 23:12:42,082 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:42,082 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-10-05 23:12:42,082 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:42,082 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:42,083 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:42,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:42,290 INFO L427 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:42,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:42,291 INFO L82 PathProgramCache]: Analyzing trace with hash 1404811516, now seen corresponding path program 52 times [2020-10-05 23:12:42,291 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:42,291 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110497120] [2020-10-05 23:12:42,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:42,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:42,383 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:42,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110497120] [2020-10-05 23:12:42,384 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1609784769] [2020-10-05 23:12:42,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:42,425 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:42,426 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:42,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:42,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:42,451 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:42,461 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:42,462 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:42,462 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:42,462 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1422201611] [2020-10-05 23:12:42,462 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:42,463 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:42,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:42,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=146, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:42,463 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-10-05 23:12:42,812 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:42,813 INFO L93 Difference]: Finished difference Result 86 states and 199 transitions. [2020-10-05 23:12:42,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:42,813 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:42,813 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:42,814 INFO L225 Difference]: With dead ends: 86 [2020-10-05 23:12:42,814 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 23:12:42,814 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 151 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=585, Unknown=0, NotChecked=0, Total=812 [2020-10-05 23:12:42,815 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 23:12:42,816 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 56. [2020-10-05 23:12:42,816 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:42,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 139 transitions. [2020-10-05 23:12:42,817 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 139 transitions. Word has length 17 [2020-10-05 23:12:42,817 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:42,817 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 139 transitions. [2020-10-05 23:12:42,817 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:42,817 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 139 transitions. [2020-10-05 23:12:42,818 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:42,818 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:42,818 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:43,026 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-05 23:12:43,027 INFO L427 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:43,027 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:43,027 INFO L82 PathProgramCache]: Analyzing trace with hash 1875807226, now seen corresponding path program 53 times [2020-10-05 23:12:43,028 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:43,028 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769555399] [2020-10-05 23:12:43,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:43,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:43,128 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:43,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769555399] [2020-10-05 23:12:43,129 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643065421] [2020-10-05 23:12:43,129 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:43,204 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:12:43,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:43,205 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:43,206 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:43,223 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:43,224 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:43,224 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:43,224 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1225901312] [2020-10-05 23:12:43,225 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:43,225 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:43,225 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:43,225 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:43,225 INFO L87 Difference]: Start difference. First operand 56 states and 139 transitions. Second operand 13 states. [2020-10-05 23:12:43,563 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:43,564 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-10-05 23:12:43,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:12:43,564 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:43,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:43,565 INFO L225 Difference]: With dead ends: 87 [2020-10-05 23:12:43,565 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 23:12:43,567 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 [2020-10-05 23:12:43,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 23:12:43,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 59. [2020-10-05 23:12:43,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 23:12:43,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-10-05 23:12:43,569 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-10-05 23:12:43,569 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:43,570 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-10-05 23:12:43,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:43,570 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-10-05 23:12:43,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:43,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:43,570 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:43,778 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:43,779 INFO L427 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:43,779 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:43,779 INFO L82 PathProgramCache]: Analyzing trace with hash 1891894366, now seen corresponding path program 54 times [2020-10-05 23:12:43,779 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:43,780 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974382754] [2020-10-05 23:12:43,780 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:43,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:43,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:43,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974382754] [2020-10-05 23:12:43,870 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [446109430] [2020-10-05 23:12:43,870 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:43,920 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 23:12:43,921 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:43,921 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:43,922 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:43,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:43,954 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:43,954 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:43,955 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:43,955 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1720244725] [2020-10-05 23:12:43,955 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:43,955 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:43,955 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:43,955 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:43,955 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-10-05 23:12:44,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:44,372 INFO L93 Difference]: Finished difference Result 84 states and 197 transitions. [2020-10-05 23:12:44,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:12:44,372 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:44,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:44,373 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:12:44,374 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:12:44,374 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=274, Invalid=656, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:12:44,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:12:44,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 58. [2020-10-05 23:12:44,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:44,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-10-05 23:12:44,377 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 17 [2020-10-05 23:12:44,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:44,377 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-10-05 23:12:44,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:44,378 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-10-05 23:12:44,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:44,378 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:44,378 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:44,586 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-05 23:12:44,587 INFO L427 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:44,587 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:44,587 INFO L82 PathProgramCache]: Analyzing trace with hash 1892384476, now seen corresponding path program 55 times [2020-10-05 23:12:44,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:44,588 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818028625] [2020-10-05 23:12:44,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:44,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:44,674 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:44,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818028625] [2020-10-05 23:12:44,675 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1743766942] [2020-10-05 23:12:44,675 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:44,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:44,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:44,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:44,738 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:44,738 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-10-05 23:12:44,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794991397] [2020-10-05 23:12:44,739 INFO L459 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-05 23:12:44,739 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:44,739 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-05 23:12:44,739 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-05 23:12:44,739 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand 13 states. [2020-10-05 23:12:45,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:45,128 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-05 23:12:45,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:45,128 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-10-05 23:12:45,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:45,129 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:12:45,129 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:12:45,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:12:45,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:12:45,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 64. [2020-10-05 23:12:45,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:12:45,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-10-05 23:12:45,133 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-10-05 23:12:45,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:45,134 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-10-05 23:12:45,134 INFO L480 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-05 23:12:45,134 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-10-05 23:12:45,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-10-05 23:12:45,134 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:45,134 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:45,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-05 23:12:45,346 INFO L427 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:45,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:45,347 INFO L82 PathProgramCache]: Analyzing trace with hash 1892401216, now seen corresponding path program 56 times [2020-10-05 23:12:45,347 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:45,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [557691973] [2020-10-05 23:12:45,348 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:45,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:45,432 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:45,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [557691973] [2020-10-05 23:12:45,432 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153762630] [2020-10-05 23:12:45,432 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:45,471 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:45,471 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:45,472 INFO L263 TraceCheckSpWp]: Trace formula consists of 109 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-05 23:12:45,472 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:45,495 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:45,508 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:45,509 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:45,509 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-10-05 23:12:45,509 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951734291] [2020-10-05 23:12:45,509 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:45,510 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:45,510 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:45,510 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:45,510 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-10-05 23:12:45,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:45,947 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-10-05 23:12:45,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:12:45,948 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-10-05 23:12:45,948 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:45,949 INFO L225 Difference]: With dead ends: 85 [2020-10-05 23:12:45,949 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:12:45,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:12:45,950 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:12:45,952 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 61. [2020-10-05 23:12:45,952 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 23:12:45,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-10-05 23:12:45,952 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-10-05 23:12:45,953 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:45,953 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-10-05 23:12:45,953 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:45,953 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-10-05 23:12:45,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:45,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:45,953 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:46,157 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-05 23:12:46,158 INFO L427 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:46,158 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:46,158 INFO L82 PathProgramCache]: Analyzing trace with hash 1171829247, now seen corresponding path program 57 times [2020-10-05 23:12:46,158 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:46,159 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661746139] [2020-10-05 23:12:46,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:46,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:46,267 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:46,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661746139] [2020-10-05 23:12:46,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593522874] [2020-10-05 23:12:46,268 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:46,313 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 23:12:46,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:46,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:46,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:46,325 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:46,325 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:46,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:46,326 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651760919] [2020-10-05 23:12:46,326 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:46,326 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:46,326 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:46,326 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:46,326 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand 14 states. [2020-10-05 23:12:46,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:46,541 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-05 23:12:46,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:46,542 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:46,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:46,543 INFO L225 Difference]: With dead ends: 94 [2020-10-05 23:12:46,543 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 23:12:46,543 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-05 23:12:46,544 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 23:12:46,546 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-10-05 23:12:46,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:46,547 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:46,548 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 23:12:46,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:46,549 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:46,549 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:46,549 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:46,550 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:46,550 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:46,550 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:46,758 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-05 23:12:46,759 INFO L427 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:46,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:46,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1866248349, now seen corresponding path program 58 times [2020-10-05 23:12:46,759 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:46,759 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1299306929] [2020-10-05 23:12:46,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:46,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:46,908 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:46,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1299306929] [2020-10-05 23:12:46,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [665174475] [2020-10-05 23:12:46,909 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:46,958 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:46,959 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:46,960 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:46,961 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:46,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:46,995 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:46,996 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:46,996 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:46,996 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [230405079] [2020-10-05 23:12:46,996 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:46,997 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:46,997 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:46,997 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:46,997 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 23:12:47,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:47,291 INFO L93 Difference]: Finished difference Result 91 states and 213 transitions. [2020-10-05 23:12:47,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:47,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:47,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:47,293 INFO L225 Difference]: With dead ends: 91 [2020-10-05 23:12:47,293 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:12:47,294 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 131 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-05 23:12:47,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:12:47,299 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-05 23:12:47,299 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:12:47,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:12:47,299 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 23:12:47,300 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:47,300 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:12:47,300 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:47,300 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:12:47,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:47,300 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:47,300 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:47,508 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-05 23:12:47,509 INFO L427 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:47,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:47,509 INFO L82 PathProgramCache]: Analyzing trace with hash -250055839, now seen corresponding path program 59 times [2020-10-05 23:12:47,509 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:47,510 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1278034302] [2020-10-05 23:12:47,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:47,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:47,609 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:47,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1278034302] [2020-10-05 23:12:47,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1586184606] [2020-10-05 23:12:47,610 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:47,670 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:12:47,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:47,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:47,672 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:47,685 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:47,685 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:47,685 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:47,685 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68815059] [2020-10-05 23:12:47,686 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:47,686 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:47,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:47,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:47,686 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 23:12:47,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:47,948 INFO L93 Difference]: Finished difference Result 88 states and 207 transitions. [2020-10-05 23:12:47,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:12:47,949 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:47,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:47,950 INFO L225 Difference]: With dead ends: 88 [2020-10-05 23:12:47,950 INFO L226 Difference]: Without dead ends: 82 [2020-10-05 23:12:47,950 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=198, Invalid=504, Unknown=0, NotChecked=0, Total=702 [2020-10-05 23:12:47,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-10-05 23:12:47,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-10-05 23:12:47,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:47,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:47,954 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 23:12:47,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:47,954 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:47,954 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:47,954 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:47,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:47,955 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:47,955 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:48,163 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:48,164 INFO L427 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:48,164 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:48,164 INFO L82 PathProgramCache]: Analyzing trace with hash 269687237, now seen corresponding path program 60 times [2020-10-05 23:12:48,164 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:48,165 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2011149685] [2020-10-05 23:12:48,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:48,172 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:48,268 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:48,268 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2011149685] [2020-10-05 23:12:48,269 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [534041211] [2020-10-05 23:12:48,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:48,322 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 23:12:48,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:48,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:48,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:48,352 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:48,363 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:48,363 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:48,364 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:48,364 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [106527338] [2020-10-05 23:12:48,364 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:48,364 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:48,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:48,365 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=169, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:48,365 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 23:12:48,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:48,704 INFO L93 Difference]: Finished difference Result 87 states and 205 transitions. [2020-10-05 23:12:48,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:48,704 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:48,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:48,705 INFO L225 Difference]: With dead ends: 87 [2020-10-05 23:12:48,706 INFO L226 Difference]: Without dead ends: 81 [2020-10-05 23:12:48,706 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=630, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:12:48,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-05 23:12:48,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 62. [2020-10-05 23:12:48,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:12:48,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:12:48,709 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 23:12:48,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:48,709 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:12:48,709 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:48,709 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:12:48,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:48,710 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:48,710 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:48,918 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:48,919 INFO L427 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:48,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:48,919 INFO L82 PathProgramCache]: Analyzing trace with hash 1924998467, now seen corresponding path program 61 times [2020-10-05 23:12:48,919 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:48,920 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805645282] [2020-10-05 23:12:48,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:48,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:49,023 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:49,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805645282] [2020-10-05 23:12:49,023 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [837696705] [2020-10-05 23:12:49,023 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:49,066 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:49,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:49,067 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:49,095 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:49,096 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:49,096 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:49,096 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142219026] [2020-10-05 23:12:49,096 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:49,097 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:49,097 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:49,097 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:49,097 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 23:12:49,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:49,422 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-05 23:12:49,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:49,423 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:49,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:49,424 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:12:49,424 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:12:49,424 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 [2020-10-05 23:12:49,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:12:49,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 63. [2020-10-05 23:12:49,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:49,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:49,426 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 23:12:49,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:49,427 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:49,427 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:49,427 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:49,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:49,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:49,427 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:49,628 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable62 [2020-10-05 23:12:49,628 INFO L427 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:49,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:49,629 INFO L82 PathProgramCache]: Analyzing trace with hash 204870823, now seen corresponding path program 62 times [2020-10-05 23:12:49,629 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:49,629 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103754792] [2020-10-05 23:12:49,630 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:49,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:49,728 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:49,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103754792] [2020-10-05 23:12:49,728 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2112574968] [2020-10-05 23:12:49,728 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:49,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:49,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:49,781 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:49,782 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:49,799 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:49,811 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:49,812 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:49,812 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:49,812 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1160733084] [2020-10-05 23:12:49,812 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:49,812 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:49,812 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:49,813 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:49,813 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 23:12:50,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:50,255 INFO L93 Difference]: Finished difference Result 83 states and 197 transitions. [2020-10-05 23:12:50,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:12:50,256 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:50,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:50,257 INFO L225 Difference]: With dead ends: 83 [2020-10-05 23:12:50,257 INFO L226 Difference]: Without dead ends: 77 [2020-10-05 23:12:50,257 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 198 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:12:50,258 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-05 23:12:50,259 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 62. [2020-10-05 23:12:50,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:12:50,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:12:50,259 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 23:12:50,260 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:50,260 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:12:50,260 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:50,260 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:12:50,260 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:50,260 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:50,260 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:50,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:50,468 INFO L427 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:50,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:50,468 INFO L82 PathProgramCache]: Analyzing trace with hash 675866533, now seen corresponding path program 63 times [2020-10-05 23:12:50,468 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:50,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139914333] [2020-10-05 23:12:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:50,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:50,566 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:50,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139914333] [2020-10-05 23:12:50,566 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [264208066] [2020-10-05 23:12:50,566 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:50,609 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-10-05 23:12:50,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:50,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:50,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:50,629 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:50,630 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:50,630 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:50,630 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128258064] [2020-10-05 23:12:50,630 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:50,630 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:50,630 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:50,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:50,631 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 23:12:50,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:50,983 INFO L93 Difference]: Finished difference Result 80 states and 191 transitions. [2020-10-05 23:12:50,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:12:50,983 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:50,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:50,984 INFO L225 Difference]: With dead ends: 80 [2020-10-05 23:12:50,984 INFO L226 Difference]: Without dead ends: 74 [2020-10-05 23:12:50,985 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=276, Invalid=654, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:12:50,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-05 23:12:50,986 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 63. [2020-10-05 23:12:50,987 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:12:50,987 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:12:50,987 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-10-05 23:12:50,987 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:50,987 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:12:50,987 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:50,988 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:12:50,988 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:50,988 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:50,988 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:51,188 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2020-10-05 23:12:51,189 INFO L427 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:51,189 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:51,189 INFO L82 PathProgramCache]: Analyzing trace with hash 691953673, now seen corresponding path program 64 times [2020-10-05 23:12:51,189 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:51,190 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1751574500] [2020-10-05 23:12:51,190 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:51,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:51,299 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:51,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1751574500] [2020-10-05 23:12:51,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947783973] [2020-10-05 23:12:51,300 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:51,348 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:51,348 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:51,348 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:51,349 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:51,374 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:51,383 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:51,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:51,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:51,384 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1642847206] [2020-10-05 23:12:51,384 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:51,384 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:51,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:51,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:51,385 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 15 states. [2020-10-05 23:12:51,878 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:51,879 INFO L93 Difference]: Finished difference Result 79 states and 189 transitions. [2020-10-05 23:12:51,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:12:51,879 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:51,880 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:51,880 INFO L225 Difference]: With dead ends: 79 [2020-10-05 23:12:51,880 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:12:51,881 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=790, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:12:51,881 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:12:51,883 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 62. [2020-10-05 23:12:51,883 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:12:51,883 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:12:51,884 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 18 [2020-10-05 23:12:51,884 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:51,884 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:12:51,884 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:51,884 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:12:51,885 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:51,885 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:51,885 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:52,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:52,086 INFO L427 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:52,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:52,086 INFO L82 PathProgramCache]: Analyzing trace with hash 692443783, now seen corresponding path program 65 times [2020-10-05 23:12:52,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:52,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1660440545] [2020-10-05 23:12:52,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:52,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:52,181 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:52,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1660440545] [2020-10-05 23:12:52,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1130671178] [2020-10-05 23:12:52,182 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:52,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-10-05 23:12:52,225 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:52,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:52,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:52,250 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:52,250 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:52,250 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-10-05 23:12:52,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122266133] [2020-10-05 23:12:52,252 INFO L459 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-05 23:12:52,252 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:52,252 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-05 23:12:52,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-10-05 23:12:52,253 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 14 states. [2020-10-05 23:12:52,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:52,638 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-05 23:12:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:52,638 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 18 [2020-10-05 23:12:52,638 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:52,639 INFO L225 Difference]: With dead ends: 95 [2020-10-05 23:12:52,639 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 23:12:52,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:12:52,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 23:12:52,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 66. [2020-10-05 23:12:52,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:12:52,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 169 transitions. [2020-10-05 23:12:52,642 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 169 transitions. Word has length 18 [2020-10-05 23:12:52,642 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:52,642 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 169 transitions. [2020-10-05 23:12:52,642 INFO L480 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-05 23:12:52,642 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 169 transitions. [2020-10-05 23:12:52,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:52,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:52,643 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:52,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2020-10-05 23:12:52,844 INFO L427 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:52,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:52,844 INFO L82 PathProgramCache]: Analyzing trace with hash 692460523, now seen corresponding path program 66 times [2020-10-05 23:12:52,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:52,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2064425974] [2020-10-05 23:12:52,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:52,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:52,940 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:52,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2064425974] [2020-10-05 23:12:52,941 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [58602993] [2020-10-05 23:12:52,941 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:52,985 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-10-05 23:12:52,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:52,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:52,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:53,004 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:53,015 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:53,015 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:53,015 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:53,015 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1592842655] [2020-10-05 23:12:53,016 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:53,016 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:53,016 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:53,016 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:53,017 INFO L87 Difference]: Start difference. First operand 66 states and 169 transitions. Second operand 15 states. [2020-10-05 23:12:53,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:53,540 INFO L93 Difference]: Finished difference Result 76 states and 185 transitions. [2020-10-05 23:12:53,540 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:12:53,541 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:53,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:53,541 INFO L225 Difference]: With dead ends: 76 [2020-10-05 23:12:53,542 INFO L226 Difference]: Without dead ends: 68 [2020-10-05 23:12:53,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=858, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:12:53,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-10-05 23:12:53,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 49. [2020-10-05 23:12:53,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 49 states. [2020-10-05 23:12:53,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-10-05 23:12:53,545 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-10-05 23:12:53,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:53,545 INFO L479 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-10-05 23:12:53,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:53,545 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-10-05 23:12:53,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-10-05 23:12:53,546 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:53,546 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:53,754 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:53,755 INFO L427 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:53,755 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:53,755 INFO L82 PathProgramCache]: Analyzing trace with hash -1465088141, now seen corresponding path program 67 times [2020-10-05 23:12:53,755 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:53,756 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513648647] [2020-10-05 23:12:53,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:53,762 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:53,853 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:53,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513648647] [2020-10-05 23:12:53,853 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [906725307] [2020-10-05 23:12:53,854 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:53,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:53,899 INFO L263 TraceCheckSpWp]: Trace formula consists of 114 conjuncts, 14 conjunts are in the unsatisfiable core [2020-10-05 23:12:53,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:53,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:53,938 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:53,938 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:53,938 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-10-05 23:12:53,938 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042795359] [2020-10-05 23:12:53,939 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:53,939 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:53,939 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:53,939 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:53,939 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand 15 states. [2020-10-05 23:12:54,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:54,447 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-10-05 23:12:54,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:54,448 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-10-05 23:12:54,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:54,449 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:12:54,449 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 23:12:54,449 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:12:54,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 23:12:54,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-10-05 23:12:54,451 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:12:54,452 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-05 23:12:54,452 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-10-05 23:12:54,452 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:54,452 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-05 23:12:54,452 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:54,452 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-05 23:12:54,453 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:54,453 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:54,453 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:54,654 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2020-10-05 23:12:54,654 INFO L427 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:54,654 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:54,655 INFO L82 PathProgramCache]: Analyzing trace with hash -8543960, now seen corresponding path program 68 times [2020-10-05 23:12:54,655 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:54,655 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1706429068] [2020-10-05 23:12:54,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:54,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:54,755 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:54,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1706429068] [2020-10-05 23:12:54,755 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089524793] [2020-10-05 23:12:54,755 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:54,813 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:54,814 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:54,814 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:54,815 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:54,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:12:54,868 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:54,868 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:54,869 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:12:54,869 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1803279032] [2020-10-05 23:12:54,869 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:12:54,869 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:54,869 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:12:54,870 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:54,870 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 16 states. [2020-10-05 23:12:55,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:55,370 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-10-05 23:12:55,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:12:55,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:12:55,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:55,372 INFO L225 Difference]: With dead ends: 72 [2020-10-05 23:12:55,372 INFO L226 Difference]: Without dead ends: 67 [2020-10-05 23:12:55,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:12:55,373 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-10-05 23:12:55,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-10-05 23:12:55,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-05 23:12:55,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-10-05 23:12:55,374 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-10-05 23:12:55,375 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:55,375 INFO L479 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-10-05 23:12:55,375 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:12:55,375 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-10-05 23:12:55,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:55,376 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:55,376 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:55,576 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-05 23:12:55,577 INFO L427 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:55,577 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:55,577 INFO L82 PathProgramCache]: Analyzing trace with hash -1356705901, now seen corresponding path program 69 times [2020-10-05 23:12:55,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:55,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [766051563] [2020-10-05 23:12:55,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:55,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:55,724 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:55,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [766051563] [2020-10-05 23:12:55,725 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1951306334] [2020-10-05 23:12:55,725 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:55,768 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:12:55,768 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:55,769 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:55,770 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:55,779 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:55,779 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:55,780 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:12:55,780 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999688854] [2020-10-05 23:12:55,780 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:55,780 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:55,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:55,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:55,780 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand 15 states. [2020-10-05 23:12:56,005 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:56,006 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-10-05 23:12:56,006 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-05 23:12:56,006 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:12:56,006 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:56,007 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:12:56,007 INFO L226 Difference]: Without dead ends: 72 [2020-10-05 23:12:56,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-10-05 23:12:56,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-10-05 23:12:56,009 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-10-05 23:12:56,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:56,010 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-10-05 23:12:56,010 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-10-05 23:12:56,010 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:56,010 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-10-05 23:12:56,010 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:56,010 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-10-05 23:12:56,011 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:56,011 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:56,011 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:56,211 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:56,212 INFO L427 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:56,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:56,212 INFO L82 PathProgramCache]: Analyzing trace with hash -371514377, now seen corresponding path program 70 times [2020-10-05 23:12:56,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:56,213 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328310412] [2020-10-05 23:12:56,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:56,219 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:56,360 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:56,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328310412] [2020-10-05 23:12:56,360 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [936474263] [2020-10-05 23:12:56,360 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:56,405 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:12:56,405 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:56,406 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:56,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:56,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:56,433 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:56,433 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:56,433 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:12:56,434 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050036422] [2020-10-05 23:12:56,434 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:12:56,434 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:56,434 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:12:56,434 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:56,434 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 16 states. [2020-10-05 23:12:56,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:56,702 INFO L93 Difference]: Finished difference Result 90 states and 205 transitions. [2020-10-05 23:12:56,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-05 23:12:56,703 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:12:56,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:56,704 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:12:56,704 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 23:12:56,704 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 [2020-10-05 23:12:56,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 23:12:56,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 56. [2020-10-05 23:12:56,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-10-05 23:12:56,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-10-05 23:12:56,707 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 19 [2020-10-05 23:12:56,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:56,708 INFO L479 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-10-05 23:12:56,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:12:56,708 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-10-05 23:12:56,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:56,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:56,708 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:56,909 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:56,909 INFO L427 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:56,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:56,910 INFO L82 PathProgramCache]: Analyzing trace with hash -1988673419, now seen corresponding path program 71 times [2020-10-05 23:12:56,910 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:56,910 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415602845] [2020-10-05 23:12:56,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:56,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:57,035 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:57,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415602845] [2020-10-05 23:12:57,035 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051713482] [2020-10-05 23:12:57,035 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:57,081 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:12:57,081 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:57,082 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:57,082 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:57,093 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:57,093 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:57,094 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:12:57,094 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [969645259] [2020-10-05 23:12:57,094 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:57,094 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:57,094 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:57,095 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:57,095 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 15 states. [2020-10-05 23:12:57,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:57,397 INFO L93 Difference]: Finished difference Result 91 states and 209 transitions. [2020-10-05 23:12:57,398 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:12:57,398 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:12:57,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:57,399 INFO L225 Difference]: With dead ends: 91 [2020-10-05 23:12:57,399 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:12:57,399 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-10-05 23:12:57,400 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:12:57,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 59. [2020-10-05 23:12:57,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-10-05 23:12:57,401 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-10-05 23:12:57,402 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 19 [2020-10-05 23:12:57,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:57,402 INFO L479 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-10-05 23:12:57,402 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:57,402 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-10-05 23:12:57,402 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:57,402 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:57,402 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:57,603 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,69 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:57,603 INFO L427 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:57,603 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:57,604 INFO L82 PathProgramCache]: Analyzing trace with hash -731783719, now seen corresponding path program 72 times [2020-10-05 23:12:57,604 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:57,604 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1963096571] [2020-10-05 23:12:57,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:57,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:57,726 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:57,726 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1963096571] [2020-10-05 23:12:57,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [752368085] [2020-10-05 23:12:57,727 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:57,780 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:12:57,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:57,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:57,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:57,819 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:57,828 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:57,829 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:57,829 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:12:57,829 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898002027] [2020-10-05 23:12:57,829 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:12:57,830 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:57,830 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:12:57,830 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:57,830 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 16 states. [2020-10-05 23:12:58,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:58,126 INFO L93 Difference]: Finished difference Result 99 states and 225 transitions. [2020-10-05 23:12:58,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:12:58,127 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:12:58,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:58,128 INFO L225 Difference]: With dead ends: 99 [2020-10-05 23:12:58,128 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:12:58,128 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 178 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=257, Invalid=673, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:12:58,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:12:58,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-10-05 23:12:58,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:12:58,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 143 transitions. [2020-10-05 23:12:58,131 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 143 transitions. Word has length 19 [2020-10-05 23:12:58,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:58,131 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 143 transitions. [2020-10-05 23:12:58,131 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:12:58,131 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 143 transitions. [2020-10-05 23:12:58,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:58,131 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:58,132 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:58,340 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:58,340 INFO L427 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:58,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:58,341 INFO L82 PathProgramCache]: Analyzing trace with hash 884408791, now seen corresponding path program 73 times [2020-10-05 23:12:58,342 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:58,342 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1476548035] [2020-10-05 23:12:58,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:58,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:58,465 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:58,465 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1476548035] [2020-10-05 23:12:58,466 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2073533162] [2020-10-05 23:12:58,466 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:58,506 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:58,507 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:58,507 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:58,519 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:58,520 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:58,520 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:12:58,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1282974955] [2020-10-05 23:12:58,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:12:58,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:58,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:12:58,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:12:58,521 INFO L87 Difference]: Start difference. First operand 58 states and 143 transitions. Second operand 15 states. [2020-10-05 23:12:58,851 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:58,852 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-05 23:12:58,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:12:58,852 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:12:58,853 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:58,853 INFO L225 Difference]: With dead ends: 99 [2020-10-05 23:12:58,853 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:12:58,854 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 200 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:12:58,854 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:12:58,856 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 61. [2020-10-05 23:12:58,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 23:12:58,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 151 transitions. [2020-10-05 23:12:58,857 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 151 transitions. Word has length 19 [2020-10-05 23:12:58,857 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:58,857 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 151 transitions. [2020-10-05 23:12:58,857 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:12:58,857 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 151 transitions. [2020-10-05 23:12:58,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:58,857 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:58,858 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:59,059 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable74 [2020-10-05 23:12:59,060 INFO L427 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:59,060 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:59,060 INFO L82 PathProgramCache]: Analyzing trace with hash 1404151867, now seen corresponding path program 74 times [2020-10-05 23:12:59,061 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:59,061 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795366886] [2020-10-05 23:12:59,061 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:59,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:59,175 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:59,175 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795366886] [2020-10-05 23:12:59,176 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1800600818] [2020-10-05 23:12:59,176 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:12:59,218 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:12:59,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:12:59,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:12:59,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:12:59,241 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:12:59,250 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:59,251 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:12:59,251 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:12:59,251 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [389765220] [2020-10-05 23:12:59,251 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:12:59,251 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:12:59,251 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:12:59,252 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:12:59,252 INFO L87 Difference]: Start difference. First operand 61 states and 151 transitions. Second operand 16 states. [2020-10-05 23:12:59,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:12:59,683 INFO L93 Difference]: Finished difference Result 96 states and 221 transitions. [2020-10-05 23:12:59,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:12:59,684 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:12:59,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:12:59,685 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:12:59,685 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:12:59,686 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=286, Invalid=770, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:12:59,686 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:12:59,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 60. [2020-10-05 23:12:59,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 23:12:59,688 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 149 transitions. [2020-10-05 23:12:59,688 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 149 transitions. Word has length 19 [2020-10-05 23:12:59,688 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:12:59,688 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 149 transitions. [2020-10-05 23:12:59,688 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:12:59,688 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 149 transitions. [2020-10-05 23:12:59,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:12:59,689 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:12:59,689 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:12:59,889 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:12:59,890 INFO L427 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:12:59,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:12:59,890 INFO L82 PathProgramCache]: Analyzing trace with hash -1235504199, now seen corresponding path program 75 times [2020-10-05 23:12:59,890 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:12:59,891 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [169383292] [2020-10-05 23:12:59,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:12:59,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:12:59,997 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:12:59,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [169383292] [2020-10-05 23:12:59,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [958092757] [2020-10-05 23:12:59,998 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:00,051 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:13:00,051 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:00,052 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:00,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:00,075 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:00,076 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:00,076 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:13:00,076 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [527037232] [2020-10-05 23:13:00,076 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:13:00,077 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:00,077 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:13:00,077 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:13:00,077 INFO L87 Difference]: Start difference. First operand 60 states and 149 transitions. Second operand 15 states. [2020-10-05 23:13:00,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:00,477 INFO L93 Difference]: Finished difference Result 97 states and 225 transitions. [2020-10-05 23:13:00,477 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:00,477 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:13:00,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:00,478 INFO L225 Difference]: With dead ends: 97 [2020-10-05 23:13:00,478 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 23:13:00,479 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:13:00,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 23:13:00,481 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 63. [2020-10-05 23:13:00,481 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:13:00,481 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-10-05 23:13:00,481 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 19 [2020-10-05 23:13:00,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:00,481 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-10-05 23:13:00,481 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:13:00,482 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-10-05 23:13:00,482 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:00,482 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:00,482 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:00,682 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable76 [2020-10-05 23:13:00,683 INFO L427 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:00,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:00,683 INFO L82 PathProgramCache]: Analyzing trace with hash 1339335453, now seen corresponding path program 76 times [2020-10-05 23:13:00,684 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:00,684 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1308149632] [2020-10-05 23:13:00,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:00,689 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:00,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1308149632] [2020-10-05 23:13:00,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [39628651] [2020-10-05 23:13:00,789 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:00,864 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:00,865 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:00,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:00,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:00,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:00,920 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:00,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:00,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:13:00,921 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1721225953] [2020-10-05 23:13:00,921 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:00,921 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:00,921 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:00,922 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=195, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:00,922 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand 16 states. [2020-10-05 23:13:01,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:01,526 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-10-05 23:13:01,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:01,527 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:13:01,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:01,528 INFO L225 Difference]: With dead ends: 94 [2020-10-05 23:13:01,528 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 23:13:01,529 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=331, Invalid=859, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:13:01,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 23:13:01,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 62. [2020-10-05 23:13:01,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:13:01,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 155 transitions. [2020-10-05 23:13:01,534 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 155 transitions. Word has length 19 [2020-10-05 23:13:01,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:01,535 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 155 transitions. [2020-10-05 23:13:01,535 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:01,535 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 155 transitions. [2020-10-05 23:13:01,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:01,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:01,536 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:01,747 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:01,747 INFO L427 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:01,748 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:01,748 INFO L82 PathProgramCache]: Analyzing trace with hash 1810331163, now seen corresponding path program 77 times [2020-10-05 23:13:01,748 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:01,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866842062] [2020-10-05 23:13:01,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:01,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:01,885 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:01,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866842062] [2020-10-05 23:13:01,886 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396758264] [2020-10-05 23:13:01,886 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:01,943 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:13:01,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:01,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:01,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:01,976 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:01,977 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:01,977 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:13:01,977 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [717648579] [2020-10-05 23:13:01,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:13:01,978 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:01,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:13:01,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:13:01,978 INFO L87 Difference]: Start difference. First operand 62 states and 155 transitions. Second operand 15 states. [2020-10-05 23:13:02,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:02,373 INFO L93 Difference]: Finished difference Result 95 states and 223 transitions. [2020-10-05 23:13:02,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:02,373 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:13:02,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:02,374 INFO L225 Difference]: With dead ends: 95 [2020-10-05 23:13:02,374 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 23:13:02,375 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:02,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 23:13:02,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 65. [2020-10-05 23:13:02,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 23:13:02,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 163 transitions. [2020-10-05 23:13:02,378 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 163 transitions. Word has length 19 [2020-10-05 23:13:02,378 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:02,378 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 163 transitions. [2020-10-05 23:13:02,378 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:13:02,378 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 163 transitions. [2020-10-05 23:13:02,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:02,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:02,379 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:02,584 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-05 23:13:02,585 INFO L427 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:02,585 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:02,585 INFO L82 PathProgramCache]: Analyzing trace with hash 1826418303, now seen corresponding path program 78 times [2020-10-05 23:13:02,586 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:02,586 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244836813] [2020-10-05 23:13:02,586 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:02,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:02,695 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:02,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244836813] [2020-10-05 23:13:02,696 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470514358] [2020-10-05 23:13:02,696 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:02,741 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:13:02,742 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:02,743 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:02,743 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:02,769 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:02,780 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:02,781 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:02,781 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:13:02,781 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602333579] [2020-10-05 23:13:02,781 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:02,781 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:02,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:02,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:02,782 INFO L87 Difference]: Start difference. First operand 65 states and 163 transitions. Second operand 16 states. [2020-10-05 23:13:03,360 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:03,360 INFO L93 Difference]: Finished difference Result 92 states and 217 transitions. [2020-10-05 23:13:03,361 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:03,361 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:13:03,361 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:03,362 INFO L225 Difference]: With dead ends: 92 [2020-10-05 23:13:03,362 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 23:13:03,363 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=392, Invalid=940, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:03,363 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 23:13:03,365 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 64. [2020-10-05 23:13:03,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:13:03,366 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-10-05 23:13:03,366 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 19 [2020-10-05 23:13:03,366 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:03,366 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-10-05 23:13:03,366 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:03,366 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-10-05 23:13:03,367 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:03,367 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:03,367 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:03,577 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:03,577 INFO L427 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:03,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:03,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1826908413, now seen corresponding path program 79 times [2020-10-05 23:13:03,578 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:03,578 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853884936] [2020-10-05 23:13:03,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:03,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:03,688 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:03,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853884936] [2020-10-05 23:13:03,689 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323509657] [2020-10-05 23:13:03,689 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:03,731 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:03,732 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:03,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:03,747 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:03,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:03,748 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-10-05 23:13:03,748 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406912024] [2020-10-05 23:13:03,748 INFO L459 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-05 23:13:03,748 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:03,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-05 23:13:03,749 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-05 23:13:03,749 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand 15 states. [2020-10-05 23:13:04,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:04,223 INFO L93 Difference]: Finished difference Result 112 states and 267 transitions. [2020-10-05 23:13:04,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:04,224 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-10-05 23:13:04,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:04,225 INFO L225 Difference]: With dead ends: 112 [2020-10-05 23:13:04,225 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 23:13:04,226 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 360 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:13:04,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 23:13:04,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2020-10-05 23:13:04,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:13:04,229 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 181 transitions. [2020-10-05 23:13:04,229 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 181 transitions. Word has length 19 [2020-10-05 23:13:04,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:04,229 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 181 transitions. [2020-10-05 23:13:04,229 INFO L480 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-05 23:13:04,229 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 181 transitions. [2020-10-05 23:13:04,229 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-10-05 23:13:04,230 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:04,230 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:04,431 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:04,432 INFO L427 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:04,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:04,432 INFO L82 PathProgramCache]: Analyzing trace with hash 1826925153, now seen corresponding path program 80 times [2020-10-05 23:13:04,433 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:04,433 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [275148485] [2020-10-05 23:13:04,433 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:04,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:04,536 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:04,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [275148485] [2020-10-05 23:13:04,536 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1905702830] [2020-10-05 23:13:04,536 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:04,612 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:04,612 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:04,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 119 conjuncts, 15 conjunts are in the unsatisfiable core [2020-10-05 23:13:04,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:04,644 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:04,657 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:04,657 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:04,657 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-10-05 23:13:04,658 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627808814] [2020-10-05 23:13:04,658 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:04,658 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:04,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:04,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:04,659 INFO L87 Difference]: Start difference. First operand 70 states and 181 transitions. Second operand 16 states. [2020-10-05 23:13:05,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:05,244 INFO L93 Difference]: Finished difference Result 93 states and 223 transitions. [2020-10-05 23:13:05,244 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:05,244 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-10-05 23:13:05,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:05,245 INFO L225 Difference]: With dead ends: 93 [2020-10-05 23:13:05,245 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:13:05,246 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:05,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:13:05,248 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 67. [2020-10-05 23:13:05,248 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 23:13:05,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-10-05 23:13:05,248 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-10-05 23:13:05,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:05,248 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-10-05 23:13:05,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:05,248 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-10-05 23:13:05,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:05,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:05,249 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:05,449 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:05,450 INFO L427 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:05,450 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:05,450 INFO L82 PathProgramCache]: Analyzing trace with hash 846490750, now seen corresponding path program 81 times [2020-10-05 23:13:05,451 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:05,451 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2111397833] [2020-10-05 23:13:05,451 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:05,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:05,603 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:05,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2111397833] [2020-10-05 23:13:05,604 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2069063992] [2020-10-05 23:13:05,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:05,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:13:05,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:05,650 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:05,651 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:05,667 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:05,667 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:05,667 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:05,667 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85851430] [2020-10-05 23:13:05,668 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:05,668 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:05,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:05,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:05,668 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand 16 states. [2020-10-05 23:13:05,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:05,964 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-10-05 23:13:05,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:13:05,965 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:05,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:05,966 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:13:05,966 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:13:05,967 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 [2020-10-05 23:13:05,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:13:05,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-10-05 23:13:05,969 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:05,969 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:05,969 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:05,969 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:05,969 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:05,970 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:05,970 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:05,970 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:05,970 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:05,970 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:06,170 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:06,171 INFO L427 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:06,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:06,172 INFO L82 PathProgramCache]: Analyzing trace with hash 1831682274, now seen corresponding path program 82 times [2020-10-05 23:13:06,172 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:06,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [523899121] [2020-10-05 23:13:06,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:06,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:06,328 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:06,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [523899121] [2020-10-05 23:13:06,329 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915050841] [2020-10-05 23:13:06,329 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:06,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:06,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:06,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:06,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:06,393 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:06,405 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:06,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:06,405 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:06,405 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345796862] [2020-10-05 23:13:06,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:06,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:06,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:06,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:06,406 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:06,782 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:06,782 INFO L93 Difference]: Finished difference Result 101 states and 237 transitions. [2020-10-05 23:13:06,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:13:06,783 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:06,783 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:06,784 INFO L225 Difference]: With dead ends: 101 [2020-10-05 23:13:06,784 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:13:06,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=285, Invalid=707, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:13:06,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:13:06,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 68. [2020-10-05 23:13:06,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:06,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:06,788 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:06,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:06,788 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:06,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:06,788 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:06,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:06,788 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:06,788 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:06,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:06,989 INFO L427 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:06,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:06,991 INFO L82 PathProgramCache]: Analyzing trace with hash 214523232, now seen corresponding path program 83 times [2020-10-05 23:13:06,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:06,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941096342] [2020-10-05 23:13:06,992 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:06,995 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:07,133 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:07,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941096342] [2020-10-05 23:13:07,134 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36018161] [2020-10-05 23:13:07,134 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:07,182 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:13:07,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:07,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:07,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:07,194 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:07,195 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:07,195 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:07,195 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1895452954] [2020-10-05 23:13:07,195 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:07,195 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:07,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:07,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:07,196 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:07,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:07,530 INFO L93 Difference]: Finished difference Result 98 states and 231 transitions. [2020-10-05 23:13:07,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:13:07,531 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:07,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:07,532 INFO L225 Difference]: With dead ends: 98 [2020-10-05 23:13:07,532 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 23:13:07,533 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-10-05 23:13:07,533 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 23:13:07,535 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 69. [2020-10-05 23:13:07,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:07,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:07,535 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:07,535 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:07,536 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:07,536 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:07,536 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:07,536 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:07,536 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:07,536 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:07,743 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:07,744 INFO L427 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:07,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:07,744 INFO L82 PathProgramCache]: Analyzing trace with hash 1471412932, now seen corresponding path program 84 times [2020-10-05 23:13:07,744 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:07,745 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299210781] [2020-10-05 23:13:07,745 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:07,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:07,891 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:07,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299210781] [2020-10-05 23:13:07,892 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031060374] [2020-10-05 23:13:07,892 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:07,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:13:07,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:07,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:07,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:07,967 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:07,978 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:07,978 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:07,978 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:07,978 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394718448] [2020-10-05 23:13:07,978 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:07,979 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:07,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:07,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:07,979 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:08,442 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:08,442 INFO L93 Difference]: Finished difference Result 97 states and 229 transitions. [2020-10-05 23:13:08,443 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:13:08,443 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:08,443 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:08,444 INFO L225 Difference]: With dead ends: 97 [2020-10-05 23:13:08,444 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 23:13:08,445 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:13:08,445 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 23:13:08,447 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 68. [2020-10-05 23:13:08,447 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:08,447 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:08,447 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:08,448 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:08,448 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:08,448 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:08,448 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:08,448 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:08,448 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:08,449 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:08,658 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:08,659 INFO L427 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:08,659 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:08,659 INFO L82 PathProgramCache]: Analyzing trace with hash -1207361854, now seen corresponding path program 85 times [2020-10-05 23:13:08,660 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:08,660 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [251183240] [2020-10-05 23:13:08,660 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:08,666 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:08,794 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:08,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [251183240] [2020-10-05 23:13:08,794 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [454289765] [2020-10-05 23:13:08,795 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:08,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:08,838 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:08,838 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:08,849 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:08,850 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:08,850 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:08,850 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1544273054] [2020-10-05 23:13:08,850 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:08,851 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:08,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:08,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:08,851 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:09,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:09,209 INFO L93 Difference]: Finished difference Result 94 states and 223 transitions. [2020-10-05 23:13:09,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:13:09,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:09,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:09,210 INFO L225 Difference]: With dead ends: 94 [2020-10-05 23:13:09,210 INFO L226 Difference]: Without dead ends: 88 [2020-10-05 23:13:09,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:13:09,211 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-10-05 23:13:09,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 69. [2020-10-05 23:13:09,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:09,213 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:09,213 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:09,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:09,213 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:09,213 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:09,214 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:09,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:09,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:09,214 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:09,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable86 [2020-10-05 23:13:09,424 INFO L427 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:09,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:09,424 INFO L82 PathProgramCache]: Analyzing trace with hash -687618778, now seen corresponding path program 86 times [2020-10-05 23:13:09,424 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:09,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448641640] [2020-10-05 23:13:09,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:09,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:09,561 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:09,561 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448641640] [2020-10-05 23:13:09,562 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [399565535] [2020-10-05 23:13:09,562 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:09,611 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:09,611 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:09,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:09,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:09,651 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:09,663 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:09,663 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:09,663 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:09,663 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [930170561] [2020-10-05 23:13:09,664 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:09,664 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:09,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:09,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:09,664 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:10,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:10,198 INFO L93 Difference]: Finished difference Result 93 states and 221 transitions. [2020-10-05 23:13:10,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:10,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:10,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:10,200 INFO L225 Difference]: With dead ends: 93 [2020-10-05 23:13:10,200 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 23:13:10,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=341, Invalid=919, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:10,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 23:13:10,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 68. [2020-10-05 23:13:10,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:10,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:10,203 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:10,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:10,203 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:10,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:10,203 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:10,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:10,203 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:10,203 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:10,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:10,404 INFO L427 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:10,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:10,405 INFO L82 PathProgramCache]: Analyzing trace with hash 967692452, now seen corresponding path program 87 times [2020-10-05 23:13:10,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:10,405 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677630165] [2020-10-05 23:13:10,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:10,412 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:10,525 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:10,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677630165] [2020-10-05 23:13:10,525 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761661718] [2020-10-05 23:13:10,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:10,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:13:10,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:10,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:10,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:10,587 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:10,587 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:10,587 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1957534174] [2020-10-05 23:13:10,587 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:10,587 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:10,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:10,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:10,588 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:11,020 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:11,020 INFO L93 Difference]: Finished difference Result 90 states and 215 transitions. [2020-10-05 23:13:11,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:11,021 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:11,021 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:11,022 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:13:11,022 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 23:13:11,024 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 251 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:13:11,024 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 23:13:11,026 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 69. [2020-10-05 23:13:11,026 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:11,026 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:11,026 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:11,026 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:11,026 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:11,026 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:11,027 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:11,027 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:11,027 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:11,027 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:11,227 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable88 [2020-10-05 23:13:11,228 INFO L427 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:11,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:11,228 INFO L82 PathProgramCache]: Analyzing trace with hash -752435192, now seen corresponding path program 88 times [2020-10-05 23:13:11,229 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:11,229 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176043221] [2020-10-05 23:13:11,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:11,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:11,356 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:11,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176043221] [2020-10-05 23:13:11,356 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1666980900] [2020-10-05 23:13:11,357 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:11,400 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:11,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:11,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:11,401 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:11,419 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:11,431 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:11,431 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:11,431 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:11,432 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1382652324] [2020-10-05 23:13:11,432 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:11,432 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:11,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:11,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=222, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:11,433 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:12,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:12,001 INFO L93 Difference]: Finished difference Result 89 states and 213 transitions. [2020-10-05 23:13:12,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:12,002 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:12,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:12,003 INFO L225 Difference]: With dead ends: 89 [2020-10-05 23:13:12,003 INFO L226 Difference]: Without dead ends: 83 [2020-10-05 23:13:12,004 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=393, Invalid=1013, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:13:12,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-10-05 23:13:12,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-10-05 23:13:12,006 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:12,006 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:12,006 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:12,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:12,006 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:12,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:12,007 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:12,007 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:12,007 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:12,007 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:12,217 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:12,218 INFO L427 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:12,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:12,218 INFO L82 PathProgramCache]: Analyzing trace with hash -281439482, now seen corresponding path program 89 times [2020-10-05 23:13:12,218 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:12,219 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118710520] [2020-10-05 23:13:12,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:12,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:12,331 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:12,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118710520] [2020-10-05 23:13:12,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1919810765] [2020-10-05 23:13:12,332 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:12,377 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-10-05 23:13:12,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:12,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:12,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:12,397 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:12,397 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:12,397 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:12,397 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532032851] [2020-10-05 23:13:12,398 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:12,398 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:12,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:12,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:12,398 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:12,871 INFO L93 Difference]: Finished difference Result 86 states and 207 transitions. [2020-10-05 23:13:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:12,872 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:12,873 INFO L225 Difference]: With dead ends: 86 [2020-10-05 23:13:12,873 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 23:13:12,874 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 300 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:12,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 23:13:12,876 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 69. [2020-10-05 23:13:12,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:12,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:12,877 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-10-05 23:13:12,877 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:12,877 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:12,877 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:12,877 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:12,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:12,877 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:12,878 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:13,085 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:13,086 INFO L427 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:13,086 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:13,086 INFO L82 PathProgramCache]: Analyzing trace with hash -265352342, now seen corresponding path program 90 times [2020-10-05 23:13:13,086 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:13,087 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [212844997] [2020-10-05 23:13:13,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:13,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:13,214 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [212844997] [2020-10-05 23:13:13,215 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186528126] [2020-10-05 23:13:13,215 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:13,260 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-10-05 23:13:13,260 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:13,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:13,262 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:13,282 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:13,302 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:13,302 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:13,302 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:13,303 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [797559146] [2020-10-05 23:13:13,303 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:13,303 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:13,303 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:13,303 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=217, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:13,303 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-10-05 23:13:13,963 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:13,963 INFO L93 Difference]: Finished difference Result 85 states and 205 transitions. [2020-10-05 23:13:13,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:13,964 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:13,964 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:13,965 INFO L225 Difference]: With dead ends: 85 [2020-10-05 23:13:13,965 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 23:13:13,965 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1099, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:13:13,965 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 23:13:13,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 68. [2020-10-05 23:13:13,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:13,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:13,967 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 20 [2020-10-05 23:13:13,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:13,968 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:13,968 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:13,968 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:13,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:13,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:13,968 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:14,168 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:14,169 INFO L427 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:14,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:14,170 INFO L82 PathProgramCache]: Analyzing trace with hash -264862232, now seen corresponding path program 91 times [2020-10-05 23:13:14,170 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:14,170 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491301565] [2020-10-05 23:13:14,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:14,175 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:14,286 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:14,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491301565] [2020-10-05 23:13:14,286 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1703506874] [2020-10-05 23:13:14,286 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:14,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:14,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:14,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:14,344 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:14,344 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:14,344 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-10-05 23:13:14,344 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904227314] [2020-10-05 23:13:14,345 INFO L459 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-05 23:13:14,345 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:14,345 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-05 23:13:14,345 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-10-05 23:13:14,345 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 16 states. [2020-10-05 23:13:14,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:14,870 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-05 23:13:14,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:14,871 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-10-05 23:13:14,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:14,872 INFO L225 Difference]: With dead ends: 101 [2020-10-05 23:13:14,872 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:13:14,873 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:14,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:13:14,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 72. [2020-10-05 23:13:14,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:13:14,875 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-10-05 23:13:14,875 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 20 [2020-10-05 23:13:14,875 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:14,876 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-10-05 23:13:14,876 INFO L480 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-05 23:13:14,876 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-10-05 23:13:14,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:14,876 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:14,876 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:15,076 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:15,077 INFO L427 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:15,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:15,078 INFO L82 PathProgramCache]: Analyzing trace with hash -264845492, now seen corresponding path program 92 times [2020-10-05 23:13:15,078 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:15,078 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663334290] [2020-10-05 23:13:15,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:15,084 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:15,195 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:15,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663334290] [2020-10-05 23:13:15,196 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101879021] [2020-10-05 23:13:15,196 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:15,241 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:15,242 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:15,243 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:15,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:15,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:15,273 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:15,274 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:15,274 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:15,274 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [990872889] [2020-10-05 23:13:15,274 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:15,275 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:15,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:15,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:15,275 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 17 states. [2020-10-05 23:13:15,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:15,966 INFO L93 Difference]: Finished difference Result 82 states and 201 transitions. [2020-10-05 23:13:15,966 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:13:15,966 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:15,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:15,967 INFO L225 Difference]: With dead ends: 82 [2020-10-05 23:13:15,967 INFO L226 Difference]: Without dead ends: 74 [2020-10-05 23:13:15,968 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:15,968 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-10-05 23:13:15,969 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 53. [2020-10-05 23:13:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-10-05 23:13:15,970 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-10-05 23:13:15,970 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-10-05 23:13:15,970 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:15,970 INFO L479 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-10-05 23:13:15,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-10-05 23:13:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-10-05 23:13:15,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:15,971 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:16,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:16,172 INFO L427 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:16,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:16,173 INFO L82 PathProgramCache]: Analyzing trace with hash 800121202, now seen corresponding path program 93 times [2020-10-05 23:13:16,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:16,173 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [753724892] [2020-10-05 23:13:16,173 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:16,290 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:16,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [753724892] [2020-10-05 23:13:16,290 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [61949558] [2020-10-05 23:13:16,290 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:16,335 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-10-05 23:13:16,336 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:16,337 INFO L263 TraceCheckSpWp]: Trace formula consists of 124 conjuncts, 16 conjunts are in the unsatisfiable core [2020-10-05 23:13:16,337 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:16,363 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:13:16,377 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:16,377 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:16,377 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-10-05 23:13:16,377 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1590660424] [2020-10-05 23:13:16,378 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:16,378 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:16,378 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:16,378 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:16,378 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand 17 states. [2020-10-05 23:13:17,004 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:17,005 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-05 23:13:17,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:17,005 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-10-05 23:13:17,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:17,006 INFO L225 Difference]: With dead ends: 92 [2020-10-05 23:13:17,006 INFO L226 Difference]: Without dead ends: 87 [2020-10-05 23:13:17,007 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:17,007 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-05 23:13:17,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-10-05 23:13:17,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:13:17,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-05 23:13:17,009 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-10-05 23:13:17,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:17,009 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-05 23:13:17,009 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:17,009 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-05 23:13:17,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:17,010 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:17,010 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:17,210 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:17,211 INFO L427 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:17,211 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:17,211 INFO L82 PathProgramCache]: Analyzing trace with hash 379740647, now seen corresponding path program 94 times [2020-10-05 23:13:17,212 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:17,212 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [148056387] [2020-10-05 23:13:17,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:17,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:17,344 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:17,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [148056387] [2020-10-05 23:13:17,344 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418131100] [2020-10-05 23:13:17,345 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:17,387 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:17,387 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:17,388 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:17,389 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:17,406 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:13:17,421 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:17,421 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:17,421 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:17,421 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1041072255] [2020-10-05 23:13:17,422 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:17,422 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:17,422 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:17,422 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:17,422 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 18 states. [2020-10-05 23:13:18,108 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:18,108 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-10-05 23:13:18,109 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:18,109 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:18,109 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:18,110 INFO L225 Difference]: With dead ends: 78 [2020-10-05 23:13:18,110 INFO L226 Difference]: Without dead ends: 73 [2020-10-05 23:13:18,110 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:13:18,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-10-05 23:13:18,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-10-05 23:13:18,112 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-10-05 23:13:18,112 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-10-05 23:13:18,112 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-10-05 23:13:18,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:18,113 INFO L479 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-10-05 23:13:18,113 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:18,113 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-10-05 23:13:18,113 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:18,113 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:18,114 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:18,316 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable95 [2020-10-05 23:13:18,317 INFO L427 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:18,317 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:18,317 INFO L82 PathProgramCache]: Analyzing trace with hash 1875703058, now seen corresponding path program 95 times [2020-10-05 23:13:18,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:18,318 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174398014] [2020-10-05 23:13:18,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:18,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:18,488 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:18,488 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174398014] [2020-10-05 23:13:18,489 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1471850280] [2020-10-05 23:13:18,489 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:18,533 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:18,533 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:18,534 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:18,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:18,544 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:18,544 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:18,544 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:18,545 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1752874023] [2020-10-05 23:13:18,545 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:18,545 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:18,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:18,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:18,545 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 17 states. [2020-10-05 23:13:18,824 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:18,824 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-10-05 23:13:18,825 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-05 23:13:18,825 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:18,825 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:18,826 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:13:18,826 INFO L226 Difference]: Without dead ends: 78 [2020-10-05 23:13:18,826 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-10-05 23:13:18,827 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-10-05 23:13:18,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-10-05 23:13:18,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:13:18,829 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-10-05 23:13:18,829 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-10-05 23:13:18,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:18,829 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-10-05 23:13:18,830 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:18,830 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-10-05 23:13:18,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:18,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:18,830 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:19,030 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:19,031 INFO L427 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:19,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:19,032 INFO L82 PathProgramCache]: Analyzing trace with hash -543014794, now seen corresponding path program 96 times [2020-10-05 23:13:19,032 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:19,032 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [324492170] [2020-10-05 23:13:19,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:19,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:19,208 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:19,208 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [324492170] [2020-10-05 23:13:19,209 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [412567264] [2020-10-05 23:13:19,209 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:19,256 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:19,256 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:19,258 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:19,258 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:19,275 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:19,285 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:19,286 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:19,286 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:19,286 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2016166160] [2020-10-05 23:13:19,286 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:19,287 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:19,287 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:19,287 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:19,287 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand 18 states. [2020-10-05 23:13:19,616 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:19,616 INFO L93 Difference]: Finished difference Result 98 states and 223 transitions. [2020-10-05 23:13:19,617 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-05 23:13:19,617 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:19,617 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:19,618 INFO L225 Difference]: With dead ends: 98 [2020-10-05 23:13:19,618 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 23:13:19,619 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=292, Invalid=700, Unknown=0, NotChecked=0, Total=992 [2020-10-05 23:13:19,619 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 23:13:19,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 60. [2020-10-05 23:13:19,621 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-10-05 23:13:19,621 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-10-05 23:13:19,621 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 21 [2020-10-05 23:13:19,621 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:19,621 INFO L479 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-10-05 23:13:19,621 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:19,622 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-10-05 23:13:19,622 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:19,622 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:19,622 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:19,825 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable97 [2020-10-05 23:13:19,826 INFO L427 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:19,826 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:19,826 INFO L82 PathProgramCache]: Analyzing trace with hash 145306996, now seen corresponding path program 97 times [2020-10-05 23:13:19,827 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:19,827 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065159567] [2020-10-05 23:13:19,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:19,834 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:19,997 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:19,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065159567] [2020-10-05 23:13:19,998 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1695786195] [2020-10-05 23:13:19,998 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:20,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:20,041 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:20,041 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:20,052 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:20,052 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:20,053 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:20,053 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529302834] [2020-10-05 23:13:20,053 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:20,053 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:20,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:20,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:20,053 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 17 states. [2020-10-05 23:13:20,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:20,411 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-10-05 23:13:20,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:13:20,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:20,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:20,413 INFO L225 Difference]: With dead ends: 99 [2020-10-05 23:13:20,413 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:13:20,413 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-10-05 23:13:20,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:13:20,415 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-10-05 23:13:20,415 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-10-05 23:13:20,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-10-05 23:13:20,416 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-10-05 23:13:20,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:20,416 INFO L479 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-10-05 23:13:20,416 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:20,416 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-10-05 23:13:20,416 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:20,416 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:20,416 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:20,617 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:20,617 INFO L427 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:20,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:20,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1130498520, now seen corresponding path program 98 times [2020-10-05 23:13:20,618 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:20,619 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2055051321] [2020-10-05 23:13:20,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:20,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:20,799 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:20,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2055051321] [2020-10-05 23:13:20,800 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1361804751] [2020-10-05 23:13:20,800 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:20,844 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:20,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:20,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:20,845 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:20,864 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:20,877 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:20,878 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:20,878 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:20,878 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131875231] [2020-10-05 23:13:20,878 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:20,878 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:20,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:20,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:20,879 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-10-05 23:13:21,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:21,285 INFO L93 Difference]: Finished difference Result 109 states and 247 transitions. [2020-10-05 23:13:21,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:13:21,286 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:21,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:21,287 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:13:21,287 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:13:21,287 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=328, Invalid=862, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:13:21,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:13:21,289 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 62. [2020-10-05 23:13:21,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:13:21,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-10-05 23:13:21,290 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 21 [2020-10-05 23:13:21,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:21,290 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-10-05 23:13:21,291 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:21,291 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-10-05 23:13:21,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:21,291 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:21,291 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:21,500 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,96 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:21,500 INFO L427 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:21,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:21,501 INFO L82 PathProgramCache]: Analyzing trace with hash -486660522, now seen corresponding path program 99 times [2020-10-05 23:13:21,501 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:21,501 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828905489] [2020-10-05 23:13:21,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:21,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:21,663 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:21,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828905489] [2020-10-05 23:13:21,663 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603680392] [2020-10-05 23:13:21,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:21,711 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:21,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:21,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:21,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:21,737 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:21,737 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:21,737 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:21,738 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [830444055] [2020-10-05 23:13:21,738 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:21,738 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:21,738 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:21,738 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:21,738 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 17 states. [2020-10-05 23:13:22,152 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:22,152 INFO L93 Difference]: Finished difference Result 109 states and 249 transitions. [2020-10-05 23:13:22,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:22,153 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:22,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:22,154 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:13:22,154 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:13:22,154 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 259 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:22,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:13:22,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 65. [2020-10-05 23:13:22,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 23:13:22,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-10-05 23:13:22,157 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-10-05 23:13:22,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:22,157 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-10-05 23:13:22,157 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:22,157 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-10-05 23:13:22,157 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:22,158 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:22,158 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:22,363 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-05 23:13:22,364 INFO L427 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:22,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:22,364 INFO L82 PathProgramCache]: Analyzing trace with hash 770229178, now seen corresponding path program 100 times [2020-10-05 23:13:22,365 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:22,365 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679297794] [2020-10-05 23:13:22,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:22,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:22,531 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:22,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679297794] [2020-10-05 23:13:22,532 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1333065435] [2020-10-05 23:13:22,532 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:22,576 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:22,576 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:22,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:22,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:22,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:22,613 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:22,613 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:22,613 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:22,614 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1811960896] [2020-10-05 23:13:22,614 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:22,614 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:22,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:22,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:22,615 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-10-05 23:13:23,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:23,197 INFO L93 Difference]: Finished difference Result 106 states and 243 transitions. [2020-10-05 23:13:23,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:23,198 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:23,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:23,199 INFO L225 Difference]: With dead ends: 106 [2020-10-05 23:13:23,200 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 23:13:23,200 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=355, Invalid=977, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:23,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 23:13:23,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-05 23:13:23,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:13:23,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-10-05 23:13:23,203 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 21 [2020-10-05 23:13:23,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:23,203 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-10-05 23:13:23,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:23,203 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-10-05 23:13:23,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:23,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:23,204 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:23,405 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-05 23:13:23,405 INFO L427 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:23,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:23,406 INFO L82 PathProgramCache]: Analyzing trace with hash -1908545608, now seen corresponding path program 101 times [2020-10-05 23:13:23,406 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:23,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371850535] [2020-10-05 23:13:23,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:23,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:23,592 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:23,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371850535] [2020-10-05 23:13:23,593 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1128932061] [2020-10-05 23:13:23,593 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:23,677 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:23,678 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:23,679 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:23,681 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:23,720 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:23,720 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:23,721 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:23,721 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1381330173] [2020-10-05 23:13:23,721 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:23,721 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:23,722 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:23,722 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:23,722 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 17 states. [2020-10-05 23:13:24,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:24,240 INFO L93 Difference]: Finished difference Result 107 states and 247 transitions. [2020-10-05 23:13:24,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:24,240 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:24,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:24,244 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:13:24,245 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:13:24,245 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 310 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:13:24,246 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:13:24,247 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-05 23:13:24,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 23:13:24,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-10-05 23:13:24,248 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-10-05 23:13:24,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:24,248 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-10-05 23:13:24,248 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:24,248 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-10-05 23:13:24,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:24,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:24,249 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:24,457 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:24,457 INFO L427 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:24,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:24,458 INFO L82 PathProgramCache]: Analyzing trace with hash -1388802532, now seen corresponding path program 102 times [2020-10-05 23:13:24,458 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:24,459 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991550617] [2020-10-05 23:13:24,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:24,467 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:24,659 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:24,659 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991550617] [2020-10-05 23:13:24,660 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396765364] [2020-10-05 23:13:24,660 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:24,743 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:24,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:24,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:24,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:24,776 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:24,793 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:24,794 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:24,794 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:24,794 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1935601061] [2020-10-05 23:13:24,795 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:24,795 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:24,795 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:24,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:24,796 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-10-05 23:13:25,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:25,451 INFO L93 Difference]: Finished difference Result 104 states and 241 transitions. [2020-10-05 23:13:25,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:25,452 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:25,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:25,452 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:13:25,453 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:13:25,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=398, Invalid=1084, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:25,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:13:25,455 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 66. [2020-10-05 23:13:25,455 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:13:25,455 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 165 transitions. [2020-10-05 23:13:25,455 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 165 transitions. Word has length 21 [2020-10-05 23:13:25,456 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:25,456 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 165 transitions. [2020-10-05 23:13:25,456 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:25,459 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 165 transitions. [2020-10-05 23:13:25,459 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:25,459 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:25,459 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:25,667 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-05 23:13:25,668 INFO L427 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:25,668 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:25,668 INFO L82 PathProgramCache]: Analyzing trace with hash 266508698, now seen corresponding path program 103 times [2020-10-05 23:13:25,669 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:25,669 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [422292324] [2020-10-05 23:13:25,669 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:25,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:25,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:25,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [422292324] [2020-10-05 23:13:25,807 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1236787939] [2020-10-05 23:13:25,807 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:25,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:25,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:25,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:25,863 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:25,864 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:25,864 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:25,864 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664800042] [2020-10-05 23:13:25,864 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:25,864 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:25,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:25,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:25,865 INFO L87 Difference]: Start difference. First operand 66 states and 165 transitions. Second operand 17 states. [2020-10-05 23:13:26,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:26,375 INFO L93 Difference]: Finished difference Result 105 states and 245 transitions. [2020-10-05 23:13:26,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:26,376 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:26,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:26,377 INFO L225 Difference]: With dead ends: 105 [2020-10-05 23:13:26,377 INFO L226 Difference]: Without dead ends: 99 [2020-10-05 23:13:26,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 371 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:13:26,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-05 23:13:26,380 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 69. [2020-10-05 23:13:26,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:26,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-10-05 23:13:26,380 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-10-05 23:13:26,381 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:26,381 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-10-05 23:13:26,381 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:26,381 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-10-05 23:13:26,381 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:26,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:26,381 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:26,585 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:26,586 INFO L427 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:26,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:26,586 INFO L82 PathProgramCache]: Analyzing trace with hash -1453618946, now seen corresponding path program 104 times [2020-10-05 23:13:26,587 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:26,587 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [384583010] [2020-10-05 23:13:26,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:26,592 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:26,730 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:26,730 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [384583010] [2020-10-05 23:13:26,731 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975875143] [2020-10-05 23:13:26,731 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:26,774 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:26,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:26,776 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:26,776 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:26,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:26,806 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:26,806 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:26,807 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:26,807 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [98088830] [2020-10-05 23:13:26,807 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:26,807 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:26,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:26,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:26,807 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-10-05 23:13:27,436 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:27,437 INFO L93 Difference]: Finished difference Result 102 states and 239 transitions. [2020-10-05 23:13:27,437 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:27,437 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:27,438 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:27,438 INFO L225 Difference]: With dead ends: 102 [2020-10-05 23:13:27,438 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 23:13:27,439 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 375 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=457, Invalid=1183, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:13:27,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 23:13:27,440 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-10-05 23:13:27,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:27,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-10-05 23:13:27,441 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 21 [2020-10-05 23:13:27,441 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:27,441 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-10-05 23:13:27,442 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:27,442 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-10-05 23:13:27,442 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:27,442 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:27,442 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:27,651 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable105 [2020-10-05 23:13:27,652 INFO L427 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:27,652 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:27,652 INFO L82 PathProgramCache]: Analyzing trace with hash -982623236, now seen corresponding path program 105 times [2020-10-05 23:13:27,653 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:27,653 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [752853127] [2020-10-05 23:13:27,653 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:27,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:27,798 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:27,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [752853127] [2020-10-05 23:13:27,798 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2092057291] [2020-10-05 23:13:27,799 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:27,843 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:27,843 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:27,844 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:27,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:27,860 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:27,860 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:27,860 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:27,861 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [40663783] [2020-10-05 23:13:27,861 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:27,861 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:27,861 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:27,861 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:27,861 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 17 states. [2020-10-05 23:13:28,409 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:28,410 INFO L93 Difference]: Finished difference Result 103 states and 243 transitions. [2020-10-05 23:13:28,410 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:13:28,410 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:28,410 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:28,411 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:13:28,411 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 23:13:28,411 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 437 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:28,412 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 23:13:28,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 71. [2020-10-05 23:13:28,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 23:13:28,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-10-05 23:13:28,413 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-10-05 23:13:28,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:28,413 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-10-05 23:13:28,413 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:28,414 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-10-05 23:13:28,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:28,414 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:28,414 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:28,615 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:28,615 INFO L427 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:28,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:28,616 INFO L82 PathProgramCache]: Analyzing trace with hash -966536096, now seen corresponding path program 106 times [2020-10-05 23:13:28,616 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:28,616 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1680641878] [2020-10-05 23:13:28,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:28,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:28,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:28,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1680641878] [2020-10-05 23:13:28,760 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243731707] [2020-10-05 23:13:28,761 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:28,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:28,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:28,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:28,807 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:28,826 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:28,839 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:28,839 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:28,839 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:28,840 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1949792379] [2020-10-05 23:13:28,840 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:28,840 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:28,840 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:28,841 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=244, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:28,841 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-10-05 23:13:29,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:29,526 INFO L93 Difference]: Finished difference Result 100 states and 237 transitions. [2020-10-05 23:13:29,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:13:29,527 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:29,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:29,527 INFO L225 Difference]: With dead ends: 100 [2020-10-05 23:13:29,527 INFO L226 Difference]: Without dead ends: 94 [2020-10-05 23:13:29,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=532, Invalid=1274, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:13:29,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-05 23:13:29,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 70. [2020-10-05 23:13:29,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:13:29,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-10-05 23:13:29,530 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 21 [2020-10-05 23:13:29,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:29,530 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-10-05 23:13:29,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:29,530 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-10-05 23:13:29,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:29,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:29,531 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:29,731 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 104 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-05 23:13:29,731 INFO L427 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:29,732 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:29,732 INFO L82 PathProgramCache]: Analyzing trace with hash -966045986, now seen corresponding path program 107 times [2020-10-05 23:13:29,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:29,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1622110332] [2020-10-05 23:13:29,733 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:29,739 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:29,865 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:29,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1622110332] [2020-10-05 23:13:29,866 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475913469] [2020-10-05 23:13:29,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:29,912 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:29,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:29,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:29,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:29,934 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:29,934 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:29,934 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-10-05 23:13:29,935 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931737425] [2020-10-05 23:13:29,935 INFO L459 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-05 23:13:29,935 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:29,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-05 23:13:29,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-05 23:13:29,936 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand 17 states. [2020-10-05 23:13:30,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:30,556 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-05 23:13:30,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:13:30,557 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-10-05 23:13:30,557 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:30,558 INFO L225 Difference]: With dead ends: 120 [2020-10-05 23:13:30,558 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 23:13:30,558 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:13:30,559 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 23:13:30,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 76. [2020-10-05 23:13:30,561 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:13:30,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-10-05 23:13:30,561 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-10-05 23:13:30,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:30,561 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-10-05 23:13:30,561 INFO L480 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-05 23:13:30,561 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-10-05 23:13:30,562 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-10-05 23:13:30,562 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:30,562 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:30,767 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-05 23:13:30,768 INFO L427 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:30,769 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:30,769 INFO L82 PathProgramCache]: Analyzing trace with hash -966029246, now seen corresponding path program 108 times [2020-10-05 23:13:30,769 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:30,769 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131963887] [2020-10-05 23:13:30,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:30,774 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:30,908 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:30,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131963887] [2020-10-05 23:13:30,909 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1429367935] [2020-10-05 23:13:30,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:30,954 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:30,955 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:30,955 INFO L263 TraceCheckSpWp]: Trace formula consists of 129 conjuncts, 17 conjunts are in the unsatisfiable core [2020-10-05 23:13:30,956 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:30,975 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:30,988 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:30,989 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:30,989 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-10-05 23:13:30,989 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955468420] [2020-10-05 23:13:30,989 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:30,990 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:30,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:30,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:30,990 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-10-05 23:13:31,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:31,784 INFO L93 Difference]: Finished difference Result 101 states and 243 transitions. [2020-10-05 23:13:31,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:13:31,785 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-10-05 23:13:31,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:31,786 INFO L225 Difference]: With dead ends: 101 [2020-10-05 23:13:31,786 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:13:31,786 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 506 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1357, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:13:31,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:13:31,788 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 73. [2020-10-05 23:13:31,788 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 23:13:31,788 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-10-05 23:13:31,788 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-10-05 23:13:31,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:31,789 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-10-05 23:13:31,789 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:31,789 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-10-05 23:13:31,789 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:31,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:31,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:31,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:31,990 INFO L427 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:31,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:31,991 INFO L82 PathProgramCache]: Analyzing trace with hash 1728807741, now seen corresponding path program 109 times [2020-10-05 23:13:31,991 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:31,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560452968] [2020-10-05 23:13:31,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:31,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:32,205 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:32,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560452968] [2020-10-05 23:13:32,205 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [707319204] [2020-10-05 23:13:32,206 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:32,276 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:32,277 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:32,278 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:32,294 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:32,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:32,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:32,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882387932] [2020-10-05 23:13:32,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:32,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:32,296 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:32,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:32,296 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand 18 states. [2020-10-05 23:13:32,758 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:32,759 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-10-05 23:13:32,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:13:32,760 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:32,760 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:32,760 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:13:32,761 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:13:32,761 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 [2020-10-05 23:13:32,762 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:13:32,763 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-10-05 23:13:32,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:32,764 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:32,764 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:32,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:32,765 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:32,765 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:32,765 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:32,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:32,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:32,766 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:32,975 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:32,975 INFO L427 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:32,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:32,976 INFO L82 PathProgramCache]: Analyzing trace with hash -689910111, now seen corresponding path program 110 times [2020-10-05 23:13:32,976 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:32,976 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717740573] [2020-10-05 23:13:32,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:32,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:33,238 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:33,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717740573] [2020-10-05 23:13:33,239 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1313551035] [2020-10-05 23:13:33,239 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:33,303 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:33,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:33,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:33,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:33,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:33,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:33,353 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:33,353 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:33,353 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2036666120] [2020-10-05 23:13:33,353 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:33,353 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:33,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:33,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:33,354 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:33,783 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:33,783 INFO L93 Difference]: Finished difference Result 111 states and 261 transitions. [2020-10-05 23:13:33,784 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:13:33,784 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:33,784 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:33,785 INFO L225 Difference]: With dead ends: 111 [2020-10-05 23:13:33,785 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 23:13:33,785 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 229 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=362, Invalid=898, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:33,786 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 23:13:33,787 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-10-05 23:13:33,787 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:33,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:33,788 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:33,788 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:33,788 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:33,788 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:33,788 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:33,788 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:33,789 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:33,789 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:33,989 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-05 23:13:33,990 INFO L427 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:33,990 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:33,990 INFO L82 PathProgramCache]: Analyzing trace with hash -1588321, now seen corresponding path program 111 times [2020-10-05 23:13:33,990 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:33,991 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953840920] [2020-10-05 23:13:33,991 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:33,997 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:34,181 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:34,181 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953840920] [2020-10-05 23:13:34,182 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1024914123] [2020-10-05 23:13:34,182 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:34,227 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:34,227 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:34,229 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:34,229 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:34,240 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:34,240 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:34,240 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:34,240 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [39615017] [2020-10-05 23:13:34,241 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:34,241 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:34,241 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:34,241 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:34,241 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:34,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:34,646 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-05 23:13:34,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:13:34,647 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:34,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:34,648 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:13:34,648 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 23:13:34,648 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-10-05 23:13:34,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 23:13:34,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 75. [2020-10-05 23:13:34,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:34,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:34,651 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:34,651 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:34,651 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:34,651 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:34,651 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:34,652 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:34,652 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:34,652 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:34,859 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:34,860 INFO L427 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:34,860 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:34,860 INFO L82 PathProgramCache]: Analyzing trace with hash 983603203, now seen corresponding path program 112 times [2020-10-05 23:13:34,860 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:34,861 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1058584318] [2020-10-05 23:13:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:34,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:35,050 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:35,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1058584318] [2020-10-05 23:13:35,050 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [979849636] [2020-10-05 23:13:35,051 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:35,095 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:35,095 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:35,096 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:35,097 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:35,117 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:35,129 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:35,129 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:35,129 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:35,130 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128708350] [2020-10-05 23:13:35,130 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:35,130 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:35,130 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:35,130 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:35,131 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:35,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:35,623 INFO L93 Difference]: Finished difference Result 107 states and 253 transitions. [2020-10-05 23:13:35,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:35,624 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:35,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:35,624 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:13:35,624 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:13:35,625 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 272 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:13:35,625 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:13:35,626 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 74. [2020-10-05 23:13:35,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:35,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:35,627 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:35,627 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:35,627 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:35,627 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:35,627 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:35,628 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:35,628 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:35,628 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:35,828 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-10-05 23:13:35,829 INFO L427 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:35,829 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:35,829 INFO L82 PathProgramCache]: Analyzing trace with hash -633555839, now seen corresponding path program 113 times [2020-10-05 23:13:35,829 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:35,830 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [142662373] [2020-10-05 23:13:35,830 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:35,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:36,015 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:36,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [142662373] [2020-10-05 23:13:36,016 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [418152466] [2020-10-05 23:13:36,016 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:36,062 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:36,063 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:36,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:36,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:36,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:36,080 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:36,080 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:36,080 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610260326] [2020-10-05 23:13:36,081 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:36,081 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:36,081 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:36,081 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:36,081 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:36,537 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:36,537 INFO L93 Difference]: Finished difference Result 104 states and 247 transitions. [2020-10-05 23:13:36,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:36,538 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:36,538 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:36,538 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:13:36,539 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:13:36,539 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:36,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:13:36,541 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 75. [2020-10-05 23:13:36,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:36,541 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:36,541 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:36,542 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:36,542 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:36,542 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:36,542 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:36,542 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:36,542 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:36,542 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:36,749 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 111 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-05 23:13:36,750 INFO L427 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:36,750 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:36,750 INFO L82 PathProgramCache]: Analyzing trace with hash 623333861, now seen corresponding path program 114 times [2020-10-05 23:13:36,751 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:36,751 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [764889706] [2020-10-05 23:13:36,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:36,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:36,934 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:36,934 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [764889706] [2020-10-05 23:13:36,935 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [901946821] [2020-10-05 23:13:36,935 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:36,982 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:36,982 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:36,983 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:36,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:37,012 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:37,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:37,025 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:37,025 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:37,025 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1127330703] [2020-10-05 23:13:37,026 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:37,026 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:37,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:37,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=282, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:37,026 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:37,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:37,615 INFO L93 Difference]: Finished difference Result 103 states and 245 transitions. [2020-10-05 23:13:37,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:37,615 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:37,616 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:37,616 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:13:37,616 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 23:13:37,617 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=414, Invalid=1146, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:13:37,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 23:13:37,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 74. [2020-10-05 23:13:37,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:37,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:37,620 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:37,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:37,620 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:37,620 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:37,620 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:37,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:37,620 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:37,621 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:37,827 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable115 [2020-10-05 23:13:37,828 INFO L427 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:37,828 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:37,828 INFO L82 PathProgramCache]: Analyzing trace with hash -2055440925, now seen corresponding path program 115 times [2020-10-05 23:13:37,828 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:37,829 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882380630] [2020-10-05 23:13:37,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:37,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:37,985 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:37,985 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882380630] [2020-10-05 23:13:37,986 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [619640392] [2020-10-05 23:13:37,986 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:38,033 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:38,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:38,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:38,048 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:38,049 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:38,049 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:38,049 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1837921794] [2020-10-05 23:13:38,049 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:38,049 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:38,050 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:38,050 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:38,050 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:38,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:38,566 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-05 23:13:38,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:38,567 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:38,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:38,567 INFO L225 Difference]: With dead ends: 100 [2020-10-05 23:13:38,568 INFO L226 Difference]: Without dead ends: 94 [2020-10-05 23:13:38,568 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 312 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:38,568 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-05 23:13:38,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 75. [2020-10-05 23:13:38,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:38,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:38,570 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:38,570 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:38,570 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:38,570 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:38,570 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:38,570 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:38,570 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:38,571 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:38,773 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:38,774 INFO L427 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:38,774 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:38,774 INFO L82 PathProgramCache]: Analyzing trace with hash -1535697849, now seen corresponding path program 116 times [2020-10-05 23:13:38,775 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:38,775 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1371432998] [2020-10-05 23:13:38,775 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:38,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:38,946 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:38,946 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1371432998] [2020-10-05 23:13:38,947 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1665991313] [2020-10-05 23:13:38,947 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:38,991 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:38,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:38,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:38,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:39,013 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:39,025 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:39,026 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:39,026 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:39,026 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [460323847] [2020-10-05 23:13:39,027 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:39,027 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:39,027 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:39,027 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=283, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:39,027 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:39,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:39,702 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-05 23:13:39,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:39,703 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:39,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:39,703 INFO L225 Difference]: With dead ends: 99 [2020-10-05 23:13:39,704 INFO L226 Difference]: Without dead ends: 93 [2020-10-05 23:13:39,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 372 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=464, Invalid=1258, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:39,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-05 23:13:39,705 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 74. [2020-10-05 23:13:39,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:39,706 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:39,706 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:39,706 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:39,706 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:39,706 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:39,706 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:39,707 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:39,707 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:39,707 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:39,915 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 114 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-10-05 23:13:39,916 INFO L427 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:39,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:39,916 INFO L82 PathProgramCache]: Analyzing trace with hash 119613381, now seen corresponding path program 117 times [2020-10-05 23:13:39,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:39,917 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [290050987] [2020-10-05 23:13:39,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:39,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:40,078 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:40,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [290050987] [2020-10-05 23:13:40,078 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1101250012] [2020-10-05 23:13:40,078 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:40,124 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:40,124 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:40,125 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:40,126 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:40,140 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:40,141 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:40,141 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:40,141 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [345264307] [2020-10-05 23:13:40,141 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:40,141 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:40,141 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:40,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:40,142 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:40,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:40,703 INFO L93 Difference]: Finished difference Result 96 states and 231 transitions. [2020-10-05 23:13:40,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:40,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:40,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:40,704 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:13:40,704 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:13:40,704 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 367 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:13:40,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:13:40,706 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 75. [2020-10-05 23:13:40,706 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:40,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:40,707 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:40,707 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:40,707 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:40,708 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:40,708 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:40,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:40,708 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:40,708 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:40,911 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:40,912 INFO L427 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:40,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:40,912 INFO L82 PathProgramCache]: Analyzing trace with hash -1600514263, now seen corresponding path program 118 times [2020-10-05 23:13:40,912 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:40,913 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2116610630] [2020-10-05 23:13:40,913 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:40,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:41,075 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:41,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2116610630] [2020-10-05 23:13:41,075 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [65830619] [2020-10-05 23:13:41,075 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:41,122 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:41,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:41,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:41,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:41,150 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:41,163 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:41,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:41,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:41,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142287226] [2020-10-05 23:13:41,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:41,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:41,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:41,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=280, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:41,165 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:41,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:41,918 INFO L93 Difference]: Finished difference Result 95 states and 229 transitions. [2020-10-05 23:13:41,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:13:41,918 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:41,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:41,919 INFO L225 Difference]: With dead ends: 95 [2020-10-05 23:13:41,919 INFO L226 Difference]: Without dead ends: 89 [2020-10-05 23:13:41,919 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 428 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=530, Invalid=1362, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:13:41,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-10-05 23:13:41,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 74. [2020-10-05 23:13:41,921 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:41,921 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:41,922 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:41,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:41,922 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:41,922 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:41,922 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:41,922 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:41,923 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:41,923 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:42,129 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,116 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:42,130 INFO L427 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:42,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:42,130 INFO L82 PathProgramCache]: Analyzing trace with hash -1129518553, now seen corresponding path program 119 times [2020-10-05 23:13:42,130 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:42,131 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1441648917] [2020-10-05 23:13:42,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:42,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:42,299 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:42,299 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1441648917] [2020-10-05 23:13:42,300 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2058142081] [2020-10-05 23:13:42,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:42,351 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-10-05 23:13:42,351 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:42,352 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:42,353 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:42,369 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:42,369 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:42,369 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:42,369 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [316060480] [2020-10-05 23:13:42,370 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:42,370 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:42,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:42,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:42,370 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:42,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:42,992 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-10-05 23:13:42,992 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:13:42,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:42,993 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:42,993 INFO L225 Difference]: With dead ends: 92 [2020-10-05 23:13:42,993 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 23:13:42,994 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 426 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:13:42,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 23:13:42,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 75. [2020-10-05 23:13:42,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:13:42,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:13:42,996 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-10-05 23:13:42,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:42,996 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:13:42,996 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:42,997 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:13:42,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:42,997 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:42,997 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:43,198 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:43,199 INFO L427 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:43,199 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:43,199 INFO L82 PathProgramCache]: Analyzing trace with hash -1113431413, now seen corresponding path program 120 times [2020-10-05 23:13:43,200 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:43,200 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1878179508] [2020-10-05 23:13:43,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:43,205 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:43,352 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1878179508] [2020-10-05 23:13:43,353 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1321327351] [2020-10-05 23:13:43,353 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:43,400 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-10-05 23:13:43,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:43,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:43,402 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:43,423 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:43,441 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:43,441 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:43,442 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:43,442 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [163782837] [2020-10-05 23:13:43,442 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:43,442 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:43,442 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:43,443 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:43,443 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 19 states. [2020-10-05 23:13:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:44,281 INFO L93 Difference]: Finished difference Result 91 states and 221 transitions. [2020-10-05 23:13:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:13:44,281 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:44,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:44,282 INFO L225 Difference]: With dead ends: 91 [2020-10-05 23:13:44,282 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:13:44,283 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 488 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=612, Invalid=1458, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:13:44,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:13:44,284 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 74. [2020-10-05 23:13:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:13:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:13:44,284 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 22 [2020-10-05 23:13:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:44,285 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:13:44,285 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:44,285 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:13:44,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:44,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:44,285 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:44,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,118 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:44,486 INFO L427 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:44,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1112941303, now seen corresponding path program 121 times [2020-10-05 23:13:44,487 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:44,487 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [93262079] [2020-10-05 23:13:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:44,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:44,638 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:44,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [93262079] [2020-10-05 23:13:44,639 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1872050368] [2020-10-05 23:13:44,639 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:44,708 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:44,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:44,756 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:44,756 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:44,756 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-10-05 23:13:44,757 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1125470970] [2020-10-05 23:13:44,757 INFO L459 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-05 23:13:44,757 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:44,757 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-05 23:13:44,757 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-10-05 23:13:44,758 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 18 states. [2020-10-05 23:13:45,439 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:45,440 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-05 23:13:45,440 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:13:45,440 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-10-05 23:13:45,441 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:45,441 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:13:45,441 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:13:45,442 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 489 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:13:45,442 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:13:45,444 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 78. [2020-10-05 23:13:45,444 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 23:13:45,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 201 transitions. [2020-10-05 23:13:45,445 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 201 transitions. Word has length 22 [2020-10-05 23:13:45,445 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:45,445 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 201 transitions. [2020-10-05 23:13:45,445 INFO L480 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-05 23:13:45,445 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 201 transitions. [2020-10-05 23:13:45,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:45,445 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:45,445 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:45,646 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-05 23:13:45,646 INFO L427 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:45,647 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:45,647 INFO L82 PathProgramCache]: Analyzing trace with hash -1112924563, now seen corresponding path program 122 times [2020-10-05 23:13:45,647 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:45,647 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779984336] [2020-10-05 23:13:45,648 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:45,652 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:45,791 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:45,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779984336] [2020-10-05 23:13:45,792 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1382408635] [2020-10-05 23:13:45,792 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:45,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:45,849 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:45,850 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:45,852 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:45,901 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:45,918 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:45,919 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:45,919 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:45,919 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94877901] [2020-10-05 23:13:45,919 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:45,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:45,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:45,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:45,920 INFO L87 Difference]: Start difference. First operand 78 states and 201 transitions. Second operand 19 states. [2020-10-05 23:13:46,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:46,888 INFO L93 Difference]: Finished difference Result 88 states and 217 transitions. [2020-10-05 23:13:46,888 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:13:46,888 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:46,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:46,889 INFO L225 Difference]: With dead ends: 88 [2020-10-05 23:13:46,889 INFO L226 Difference]: Without dead ends: 80 [2020-10-05 23:13:46,890 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:13:46,890 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-05 23:13:46,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 57. [2020-10-05 23:13:46,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-10-05 23:13:46,892 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-10-05 23:13:46,892 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-10-05 23:13:46,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:46,892 INFO L479 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-10-05 23:13:46,892 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:46,892 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-10-05 23:13:46,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-10-05 23:13:46,892 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:46,892 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:47,093 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 120 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable123 [2020-10-05 23:13:47,093 INFO L427 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:47,093 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:47,094 INFO L82 PathProgramCache]: Analyzing trace with hash 117880753, now seen corresponding path program 123 times [2020-10-05 23:13:47,094 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:47,094 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406329404] [2020-10-05 23:13:47,094 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:47,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:47,241 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:47,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406329404] [2020-10-05 23:13:47,242 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1839723790] [2020-10-05 23:13:47,242 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:47,288 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-10-05 23:13:47,289 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:47,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 134 conjuncts, 18 conjunts are in the unsatisfiable core [2020-10-05 23:13:47,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:47,311 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:13:47,327 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:47,328 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:47,328 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-10-05 23:13:47,328 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013536338] [2020-10-05 23:13:47,328 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:47,329 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:47,329 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:47,329 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:47,329 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand 19 states. [2020-10-05 23:13:48,128 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:48,128 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-10-05 23:13:48,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:13:48,129 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-10-05 23:13:48,129 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:48,129 INFO L225 Difference]: With dead ends: 100 [2020-10-05 23:13:48,130 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:13:48,130 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:13:48,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:13:48,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-10-05 23:13:48,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:13:48,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-05 23:13:48,132 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-10-05 23:13:48,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:48,133 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-05 23:13:48,133 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:48,133 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-05 23:13:48,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:48,133 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:48,133 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:48,337 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 121 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-05 23:13:48,338 INFO L427 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:48,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:48,338 INFO L82 PathProgramCache]: Analyzing trace with hash -140906778, now seen corresponding path program 124 times [2020-10-05 23:13:48,339 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:48,339 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1480110118] [2020-10-05 23:13:48,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:48,346 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:48,510 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:48,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1480110118] [2020-10-05 23:13:48,511 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586468412] [2020-10-05 23:13:48,511 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:48,554 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:48,554 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:48,555 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:48,556 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:48,576 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:13:48,593 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:48,594 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:48,594 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:48,594 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [852917489] [2020-10-05 23:13:48,594 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:48,594 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:48,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:48,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:48,595 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 20 states. [2020-10-05 23:13:49,469 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:49,469 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-10-05 23:13:49,470 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:13:49,470 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:49,470 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:49,471 INFO L225 Difference]: With dead ends: 84 [2020-10-05 23:13:49,471 INFO L226 Difference]: Without dead ends: 79 [2020-10-05 23:13:49,471 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:13:49,472 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-10-05 23:13:49,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-10-05 23:13:49,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-10-05 23:13:49,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-10-05 23:13:49,473 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-10-05 23:13:49,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:49,474 INFO L479 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-10-05 23:13:49,474 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:49,474 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-10-05 23:13:49,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:49,474 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:49,474 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:49,675 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-05 23:13:49,675 INFO L427 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:49,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:49,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1335609647, now seen corresponding path program 125 times [2020-10-05 23:13:49,676 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:49,676 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1600399114] [2020-10-05 23:13:49,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:49,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:49,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1600399114] [2020-10-05 23:13:49,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1558685688] [2020-10-05 23:13:49,899 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:49,945 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:13:49,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:49,947 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:49,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:49,958 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:49,958 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:49,958 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:49,958 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1401254400] [2020-10-05 23:13:49,959 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:49,959 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:49,959 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:49,959 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:49,959 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand 19 states. [2020-10-05 23:13:50,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:50,320 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-10-05 23:13:50,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-05 23:13:50,321 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:50,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:50,321 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:13:50,322 INFO L226 Difference]: Without dead ends: 84 [2020-10-05 23:13:50,322 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-10-05 23:13:50,322 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-10-05 23:13:50,323 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-10-05 23:13:50,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:13:50,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-10-05 23:13:50,324 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-10-05 23:13:50,324 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:50,324 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-10-05 23:13:50,324 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:50,324 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-10-05 23:13:50,324 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:50,324 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:50,325 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:50,525 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:50,526 INFO L427 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:50,526 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:50,527 INFO L82 PathProgramCache]: Analyzing trace with hash -2146158283, now seen corresponding path program 126 times [2020-10-05 23:13:50,527 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:50,528 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1375221303] [2020-10-05 23:13:50,528 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:50,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:50,759 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:50,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1375221303] [2020-10-05 23:13:50,759 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [43272354] [2020-10-05 23:13:50,759 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:50,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:13:50,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:50,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:50,809 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:50,831 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:50,842 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:50,843 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:50,843 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:50,843 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646231510] [2020-10-05 23:13:50,843 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:50,843 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:50,844 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:50,844 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:50,844 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 20 states. [2020-10-05 23:13:51,260 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:51,260 INFO L93 Difference]: Finished difference Result 106 states and 241 transitions. [2020-10-05 23:13:51,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-05 23:13:51,261 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:51,261 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:51,262 INFO L225 Difference]: With dead ends: 106 [2020-10-05 23:13:51,262 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 23:13:51,262 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 227 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=372, Invalid=888, Unknown=0, NotChecked=0, Total=1260 [2020-10-05 23:13:51,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 23:13:51,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 64. [2020-10-05 23:13:51,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-05 23:13:51,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 157 transitions. [2020-10-05 23:13:51,265 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 157 transitions. Word has length 23 [2020-10-05 23:13:51,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:51,265 INFO L479 AbstractCegarLoop]: Abstraction has 64 states and 157 transitions. [2020-10-05 23:13:51,265 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:51,266 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 157 transitions. [2020-10-05 23:13:51,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:51,266 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:51,266 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:51,467 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 124 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable127 [2020-10-05 23:13:51,468 INFO L427 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:51,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:51,469 INFO L82 PathProgramCache]: Analyzing trace with hash -2093881677, now seen corresponding path program 127 times [2020-10-05 23:13:51,469 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:51,469 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811195169] [2020-10-05 23:13:51,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:51,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:51,683 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:51,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811195169] [2020-10-05 23:13:51,684 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [587819048] [2020-10-05 23:13:51,684 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:51,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:51,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:51,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:51,743 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:51,744 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:51,744 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:51,744 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1216664554] [2020-10-05 23:13:51,744 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:51,744 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:51,745 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:51,745 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:51,745 INFO L87 Difference]: Start difference. First operand 64 states and 157 transitions. Second operand 19 states. [2020-10-05 23:13:52,210 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:52,210 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-10-05 23:13:52,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:13:52,211 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:52,211 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:52,211 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:13:52,211 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:13:52,211 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 233 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=377, Invalid=955, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:13:52,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:13:52,213 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-10-05 23:13:52,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-10-05 23:13:52,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-10-05 23:13:52,214 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-10-05 23:13:52,214 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:52,214 INFO L479 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-10-05 23:13:52,215 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:52,215 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-10-05 23:13:52,215 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:52,215 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:52,215 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:52,423 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 125 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-05 23:13:52,424 INFO L427 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:52,424 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:52,424 INFO L82 PathProgramCache]: Analyzing trace with hash -217632233, now seen corresponding path program 128 times [2020-10-05 23:13:52,425 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:52,425 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [512853387] [2020-10-05 23:13:52,425 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:52,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:52,637 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:52,637 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [512853387] [2020-10-05 23:13:52,638 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815694939] [2020-10-05 23:13:52,638 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:52,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:52,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:52,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:52,685 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:52,705 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:52,717 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:52,718 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:52,718 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:52,718 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364882749] [2020-10-05 23:13:52,718 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:52,718 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:52,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:52,719 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:52,719 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-10-05 23:13:53,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:53,212 INFO L93 Difference]: Finished difference Result 119 states and 269 transitions. [2020-10-05 23:13:53,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:13:53,213 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:53,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:53,213 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:13:53,214 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:13:53,214 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=409, Invalid=1073, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:13:53,214 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:13:53,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 66. [2020-10-05 23:13:53,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:13:53,216 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 163 transitions. [2020-10-05 23:13:53,216 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 163 transitions. Word has length 23 [2020-10-05 23:13:53,217 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:53,217 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 163 transitions. [2020-10-05 23:13:53,217 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:53,217 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 163 transitions. [2020-10-05 23:13:53,217 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:53,217 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:53,217 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:53,417 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable129 [2020-10-05 23:13:53,418 INFO L427 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:53,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:53,419 INFO L82 PathProgramCache]: Analyzing trace with hash 470689557, now seen corresponding path program 129 times [2020-10-05 23:13:53,419 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:53,419 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1066343884] [2020-10-05 23:13:53,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:53,425 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:53,620 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:53,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1066343884] [2020-10-05 23:13:53,621 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1564510201] [2020-10-05 23:13:53,621 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:53,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:13:53,668 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:53,669 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:53,670 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:53,690 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:53,691 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:53,691 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:53,691 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [547248383] [2020-10-05 23:13:53,691 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:53,691 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:53,692 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:53,692 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:53,692 INFO L87 Difference]: Start difference. First operand 66 states and 163 transitions. Second operand 19 states. [2020-10-05 23:13:54,201 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:54,201 INFO L93 Difference]: Finished difference Result 119 states and 271 transitions. [2020-10-05 23:13:54,202 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:13:54,202 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:54,202 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:54,202 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:13:54,202 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:13:54,203 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 324 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=428, Invalid=1132, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:13:54,203 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:13:54,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 69. [2020-10-05 23:13:54,204 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-10-05 23:13:54,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-10-05 23:13:54,205 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-10-05 23:13:54,205 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:54,205 INFO L479 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-10-05 23:13:54,205 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:54,206 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-10-05 23:13:54,206 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:54,206 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:54,206 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:54,415 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,127 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:54,416 INFO L427 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:54,416 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:54,416 INFO L82 PathProgramCache]: Analyzing trace with hash 1455881081, now seen corresponding path program 130 times [2020-10-05 23:13:54,416 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:54,417 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [423348751] [2020-10-05 23:13:54,417 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:54,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:54,625 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:54,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [423348751] [2020-10-05 23:13:54,625 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1483888818] [2020-10-05 23:13:54,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:54,672 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:13:54,672 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:54,673 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:54,674 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:54,693 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:54,706 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:54,706 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:54,707 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:54,707 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057411779] [2020-10-05 23:13:54,707 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:54,707 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:54,707 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:54,708 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:54,708 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-10-05 23:13:55,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:55,299 INFO L93 Difference]: Finished difference Result 116 states and 265 transitions. [2020-10-05 23:13:55,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:13:55,299 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:55,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:55,299 INFO L225 Difference]: With dead ends: 116 [2020-10-05 23:13:55,300 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 23:13:55,300 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 337 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=434, Invalid=1206, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:13:55,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 23:13:55,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 68. [2020-10-05 23:13:55,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:13:55,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 169 transitions. [2020-10-05 23:13:55,301 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 169 transitions. Word has length 23 [2020-10-05 23:13:55,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:55,302 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 169 transitions. [2020-10-05 23:13:55,302 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:55,302 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 169 transitions. [2020-10-05 23:13:55,302 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:55,302 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:55,302 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:55,503 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,128 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:55,503 INFO L427 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:55,503 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:55,504 INFO L82 PathProgramCache]: Analyzing trace with hash -161277961, now seen corresponding path program 131 times [2020-10-05 23:13:55,504 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:55,504 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1960378266] [2020-10-05 23:13:55,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:55,510 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:55,701 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:55,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1960378266] [2020-10-05 23:13:55,701 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956518688] [2020-10-05 23:13:55,702 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:55,752 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:13:55,752 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:55,754 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:55,754 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:55,770 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:55,772 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:55,772 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:55,772 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1701106527] [2020-10-05 23:13:55,772 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:55,773 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:55,773 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:55,775 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:55,776 INFO L87 Difference]: Start difference. First operand 68 states and 169 transitions. Second operand 19 states. [2020-10-05 23:13:56,328 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:56,329 INFO L93 Difference]: Finished difference Result 117 states and 269 transitions. [2020-10-05 23:13:56,329 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:13:56,329 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:56,329 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:56,330 INFO L225 Difference]: With dead ends: 117 [2020-10-05 23:13:56,330 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 23:13:56,330 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 381 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=468, Invalid=1254, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:13:56,330 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 23:13:56,332 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 71. [2020-10-05 23:13:56,332 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 23:13:56,332 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-10-05 23:13:56,333 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-10-05 23:13:56,333 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:56,333 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-10-05 23:13:56,333 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:56,334 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-10-05 23:13:56,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:56,334 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:56,334 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:56,542 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132,129 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:56,543 INFO L427 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:56,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:56,543 INFO L82 PathProgramCache]: Analyzing trace with hash 1095611739, now seen corresponding path program 132 times [2020-10-05 23:13:56,543 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:56,544 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60947917] [2020-10-05 23:13:56,544 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:56,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:56,741 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:56,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60947917] [2020-10-05 23:13:56,742 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [699539804] [2020-10-05 23:13:56,742 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:56,793 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:13:56,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:56,795 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:56,796 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:56,818 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:56,830 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:56,830 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:56,830 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:56,831 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45197867] [2020-10-05 23:13:56,831 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:56,831 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:56,831 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:56,831 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:56,832 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-10-05 23:13:57,468 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:57,469 INFO L93 Difference]: Finished difference Result 114 states and 263 transitions. [2020-10-05 23:13:57,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:13:57,469 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:57,469 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:57,470 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:13:57,470 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:13:57,470 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=475, Invalid=1331, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:13:57,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:13:57,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 70. [2020-10-05 23:13:57,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:13:57,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-10-05 23:13:57,471 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 23 [2020-10-05 23:13:57,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:57,472 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-10-05 23:13:57,472 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:57,472 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-10-05 23:13:57,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:57,472 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:57,473 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:57,673 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-05 23:13:57,674 INFO L427 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:57,674 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:57,675 INFO L82 PathProgramCache]: Analyzing trace with hash -1583163047, now seen corresponding path program 133 times [2020-10-05 23:13:57,675 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:57,675 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271497925] [2020-10-05 23:13:57,675 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:57,680 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:57,860 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:57,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271497925] [2020-10-05 23:13:57,860 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781110995] [2020-10-05 23:13:57,860 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:57,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:57,904 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:57,904 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:57,919 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:57,920 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:57,920 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:13:57,920 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1344499388] [2020-10-05 23:13:57,920 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:13:57,920 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:57,920 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:13:57,921 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:13:57,921 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 19 states. [2020-10-05 23:13:58,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:58,527 INFO L93 Difference]: Finished difference Result 115 states and 267 transitions. [2020-10-05 23:13:58,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:13:58,527 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:13:58,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:58,527 INFO L225 Difference]: With dead ends: 115 [2020-10-05 23:13:58,528 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 23:13:58,528 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=524, Invalid=1368, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:13:58,528 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 23:13:58,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 73. [2020-10-05 23:13:58,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 23:13:58,529 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-10-05 23:13:58,529 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-10-05 23:13:58,529 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:58,530 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-10-05 23:13:58,530 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:13:58,530 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-10-05 23:13:58,530 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:58,530 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:58,530 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:58,730 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:13:58,731 INFO L427 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:58,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:58,731 INFO L82 PathProgramCache]: Analyzing trace with hash -1063419971, now seen corresponding path program 134 times [2020-10-05 23:13:58,732 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:58,732 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1374275907] [2020-10-05 23:13:58,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:58,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:13:58,933 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:58,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1374275907] [2020-10-05 23:13:58,933 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1315026140] [2020-10-05 23:13:58,934 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:13:58,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:13:58,979 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:13:58,980 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:13:58,980 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:13:59,003 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:13:59,017 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:13:59,017 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:13:59,017 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:13:59,017 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [93944263] [2020-10-05 23:13:59,017 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:13:59,018 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:13:59,018 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:13:59,018 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=315, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:13:59,018 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-10-05 23:13:59,750 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:13:59,750 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-10-05 23:13:59,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:13:59,751 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:13:59,751 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:13:59,751 INFO L225 Difference]: With dead ends: 112 [2020-10-05 23:13:59,752 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 23:13:59,752 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=532, Invalid=1448, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:13:59,752 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 23:13:59,754 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 72. [2020-10-05 23:13:59,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:13:59,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 181 transitions. [2020-10-05 23:13:59,755 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 181 transitions. Word has length 23 [2020-10-05 23:13:59,755 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:13:59,755 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 181 transitions. [2020-10-05 23:13:59,755 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:13:59,755 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 181 transitions. [2020-10-05 23:13:59,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:13:59,756 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:13:59,756 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:13:59,964 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-05 23:13:59,965 INFO L427 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:13:59,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:13:59,965 INFO L82 PathProgramCache]: Analyzing trace with hash 591891259, now seen corresponding path program 135 times [2020-10-05 23:13:59,965 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:13:59,966 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158330125] [2020-10-05 23:13:59,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:13:59,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:00,142 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:00,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158330125] [2020-10-05 23:14:00,143 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2006977834] [2020-10-05 23:14:00,143 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:00,192 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:14:00,192 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:00,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:00,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:00,209 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:00,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:00,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:14:00,209 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687683799] [2020-10-05 23:14:00,209 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:14:00,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:00,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:14:00,210 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:14:00,210 INFO L87 Difference]: Start difference. First operand 72 states and 181 transitions. Second operand 19 states. [2020-10-05 23:14:00,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:00,865 INFO L93 Difference]: Finished difference Result 113 states and 265 transitions. [2020-10-05 23:14:00,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:14:00,866 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:14:00,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:00,866 INFO L225 Difference]: With dead ends: 113 [2020-10-05 23:14:00,866 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 23:14:00,867 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 520 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=596, Invalid=1474, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:14:00,867 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 23:14:00,868 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 75. [2020-10-05 23:14:00,868 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:14:00,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-10-05 23:14:00,868 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-10-05 23:14:00,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:00,869 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-10-05 23:14:00,869 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:14:00,869 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-10-05 23:14:00,869 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:00,869 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:00,869 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:01,070 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-05 23:14:01,070 INFO L427 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:01,071 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:01,071 INFO L82 PathProgramCache]: Analyzing trace with hash -1128236385, now seen corresponding path program 136 times [2020-10-05 23:14:01,071 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:01,071 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840205501] [2020-10-05 23:14:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:01,080 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:01,256 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:01,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840205501] [2020-10-05 23:14:01,257 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1701469456] [2020-10-05 23:14:01,257 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:01,300 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:01,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:01,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:01,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:01,325 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:01,338 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:01,338 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:01,338 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:14:01,338 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331783240] [2020-10-05 23:14:01,339 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:01,339 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:01,339 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:01,339 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=311, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:01,340 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-10-05 23:14:02,165 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:02,165 INFO L93 Difference]: Finished difference Result 110 states and 259 transitions. [2020-10-05 23:14:02,166 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:14:02,166 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:14:02,166 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:02,166 INFO L225 Difference]: With dead ends: 110 [2020-10-05 23:14:02,166 INFO L226 Difference]: Without dead ends: 104 [2020-10-05 23:14:02,167 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=605, Invalid=1557, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:14:02,167 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-05 23:14:02,168 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 74. [2020-10-05 23:14:02,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:14:02,169 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 187 transitions. [2020-10-05 23:14:02,169 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 187 transitions. Word has length 23 [2020-10-05 23:14:02,169 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:02,169 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 187 transitions. [2020-10-05 23:14:02,169 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:02,169 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 187 transitions. [2020-10-05 23:14:02,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:02,169 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:02,169 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:02,370 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 134 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable137 [2020-10-05 23:14:02,370 INFO L427 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:02,371 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:02,371 INFO L82 PathProgramCache]: Analyzing trace with hash -657240675, now seen corresponding path program 137 times [2020-10-05 23:14:02,371 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:02,371 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785525321] [2020-10-05 23:14:02,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:02,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:02,548 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:02,548 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785525321] [2020-10-05 23:14:02,549 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1842949167] [2020-10-05 23:14:02,549 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:02,595 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:14:02,595 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:02,596 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:02,597 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:02,626 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:02,626 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:02,627 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:14:02,627 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1115799173] [2020-10-05 23:14:02,627 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:14:02,627 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:02,627 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:14:02,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:14:02,628 INFO L87 Difference]: Start difference. First operand 74 states and 187 transitions. Second operand 19 states. [2020-10-05 23:14:03,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:03,447 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-10-05 23:14:03,451 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:14:03,452 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:14:03,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:03,452 INFO L225 Difference]: With dead ends: 111 [2020-10-05 23:14:03,452 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 23:14:03,453 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 596 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=684, Invalid=1572, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:14:03,453 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 23:14:03,454 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 77. [2020-10-05 23:14:03,454 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 23:14:03,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-10-05 23:14:03,454 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-10-05 23:14:03,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:03,454 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-10-05 23:14:03,454 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:14:03,454 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-10-05 23:14:03,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:03,455 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:03,455 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:03,655 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:03,656 INFO L427 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:03,656 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:03,656 INFO L82 PathProgramCache]: Analyzing trace with hash -641153535, now seen corresponding path program 138 times [2020-10-05 23:14:03,657 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:03,657 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609258733] [2020-10-05 23:14:03,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:03,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:03,829 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:03,829 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609258733] [2020-10-05 23:14:03,830 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1661310969] [2020-10-05 23:14:03,830 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:03,878 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:14:03,878 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:03,879 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:03,880 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:03,900 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:03,913 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:03,914 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:03,914 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:14:03,914 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543226148] [2020-10-05 23:14:03,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:03,915 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:03,915 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:03,915 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=303, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:03,915 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-10-05 23:14:04,829 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:04,829 INFO L93 Difference]: Finished difference Result 108 states and 257 transitions. [2020-10-05 23:14:04,829 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:14:04,830 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:14:04,830 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:04,830 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:14:04,830 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 23:14:04,830 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 597 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1658, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:14:04,831 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 23:14:04,832 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 76. [2020-10-05 23:14:04,832 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:14:04,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-10-05 23:14:04,833 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 23 [2020-10-05 23:14:04,833 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:04,834 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-10-05 23:14:04,834 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:04,834 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-10-05 23:14:04,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:04,834 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:04,835 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:05,042 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 136 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-05 23:14:05,042 INFO L427 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:05,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:05,043 INFO L82 PathProgramCache]: Analyzing trace with hash -640663425, now seen corresponding path program 139 times [2020-10-05 23:14:05,043 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:05,043 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1664159330] [2020-10-05 23:14:05,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:05,048 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:05,224 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:05,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1664159330] [2020-10-05 23:14:05,224 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [567757537] [2020-10-05 23:14:05,224 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:05,266 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:05,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:05,268 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:05,287 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:05,287 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:05,287 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-10-05 23:14:05,287 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [513775680] [2020-10-05 23:14:05,288 INFO L459 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-10-05 23:14:05,288 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:05,288 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-10-05 23:14:05,288 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-10-05 23:14:05,288 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand 19 states. [2020-10-05 23:14:06,061 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:06,062 INFO L93 Difference]: Finished difference Result 128 states and 307 transitions. [2020-10-05 23:14:06,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:06,063 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 23 [2020-10-05 23:14:06,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:06,063 INFO L225 Difference]: With dead ends: 128 [2020-10-05 23:14:06,064 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 23:14:06,064 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 676 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=788, Invalid=1662, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:14:06,064 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 23:14:06,065 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 82. [2020-10-05 23:14:06,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:14:06,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-10-05 23:14:06,066 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-10-05 23:14:06,066 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:06,066 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-10-05 23:14:06,066 INFO L480 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-10-05 23:14:06,066 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-10-05 23:14:06,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-10-05 23:14:06,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:06,067 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:06,267 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:06,267 INFO L427 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:06,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:06,268 INFO L82 PathProgramCache]: Analyzing trace with hash -640646685, now seen corresponding path program 140 times [2020-10-05 23:14:06,268 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:06,268 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [553941649] [2020-10-05 23:14:06,269 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:06,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:06,439 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:06,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [553941649] [2020-10-05 23:14:06,439 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1384206293] [2020-10-05 23:14:06,439 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:06,482 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:06,482 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:06,483 INFO L263 TraceCheckSpWp]: Trace formula consists of 139 conjuncts, 19 conjunts are in the unsatisfiable core [2020-10-05 23:14:06,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:06,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:06,519 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:06,519 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:06,519 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-10-05 23:14:06,520 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643272800] [2020-10-05 23:14:06,520 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:06,520 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:06,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:06,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:06,521 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 20 states. [2020-10-05 23:14:07,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:07,458 INFO L93 Difference]: Finished difference Result 109 states and 263 transitions. [2020-10-05 23:14:07,458 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:14:07,458 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-10-05 23:14:07,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:07,459 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:14:07,459 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:14:07,460 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 675 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=799, Invalid=1751, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:14:07,460 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:14:07,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 79. [2020-10-05 23:14:07,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 23:14:07,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-10-05 23:14:07,462 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-10-05 23:14:07,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:07,462 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-10-05 23:14:07,462 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:07,462 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-10-05 23:14:07,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:07,462 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:07,462 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:07,663 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,138 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:07,663 INFO L427 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:07,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:07,664 INFO L82 PathProgramCache]: Analyzing trace with hash -768088516, now seen corresponding path program 141 times [2020-10-05 23:14:07,664 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:07,664 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [240243292] [2020-10-05 23:14:07,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:07,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:07,919 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:07,919 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [240243292] [2020-10-05 23:14:07,920 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36285228] [2020-10-05 23:14:07,920 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:07,970 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:14:07,970 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:07,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:07,972 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:07,983 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:07,983 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:07,983 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:07,983 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1724112100] [2020-10-05 23:14:07,984 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:07,984 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:07,984 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:07,984 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:07,984 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand 20 states. [2020-10-05 23:14:08,423 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:08,423 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-10-05 23:14:08,424 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:14:08,424 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:08,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:08,425 INFO L225 Difference]: With dead ends: 124 [2020-10-05 23:14:08,425 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 23:14:08,425 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-10-05 23:14:08,426 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 23:14:08,427 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-10-05 23:14:08,427 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:08,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:08,428 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:08,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:08,428 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:08,428 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:08,428 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:08,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:08,429 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:08,429 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:08,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,139 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:08,637 INFO L427 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:08,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:08,638 INFO L82 PathProgramCache]: Analyzing trace with hash -1578637152, now seen corresponding path program 142 times [2020-10-05 23:14:08,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:08,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543433891] [2020-10-05 23:14:08,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:08,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:08,897 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:08,897 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543433891] [2020-10-05 23:14:08,898 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1112970867] [2020-10-05 23:14:08,898 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:08,942 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:08,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:08,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:08,943 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:08,964 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:08,976 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:08,976 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:08,976 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:08,976 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364609051] [2020-10-05 23:14:08,977 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:08,977 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:08,977 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:08,977 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:08,977 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:09,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:09,503 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-05 23:14:09,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:14:09,504 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:09,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:09,504 INFO L225 Difference]: With dead ends: 121 [2020-10-05 23:14:09,504 INFO L226 Difference]: Without dead ends: 115 [2020-10-05 23:14:09,505 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=449, Invalid=1111, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:14:09,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-05 23:14:09,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 80. [2020-10-05 23:14:09,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:09,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:09,507 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:09,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:09,507 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:09,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:09,507 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:09,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:09,508 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:09,508 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:09,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,140 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:09,709 INFO L427 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:09,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:09,709 INFO L82 PathProgramCache]: Analyzing trace with hash -1526360546, now seen corresponding path program 143 times [2020-10-05 23:14:09,710 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:09,710 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1719628365] [2020-10-05 23:14:09,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:09,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:09,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1719628365] [2020-10-05 23:14:09,945 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1040666726] [2020-10-05 23:14:09,945 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:09,992 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:14:09,993 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:09,994 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:09,994 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:10,006 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:10,007 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:10,007 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:10,007 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [17743734] [2020-10-05 23:14:10,007 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:10,007 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:10,007 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:10,008 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:10,008 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:10,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:10,508 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-05 23:14:10,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:14:10,509 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:10,509 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:10,510 INFO L225 Difference]: With dead ends: 118 [2020-10-05 23:14:10,510 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 23:14:10,510 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 269 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=414, Invalid=1068, Unknown=0, NotChecked=0, Total=1482 [2020-10-05 23:14:10,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 23:14:10,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 81. [2020-10-05 23:14:10,512 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:10,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:10,512 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:10,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:10,512 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:10,513 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:10,513 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:10,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:10,513 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:10,513 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:10,713 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144,141 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:10,714 INFO L427 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:10,714 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:10,714 INFO L82 PathProgramCache]: Analyzing trace with hash 349888898, now seen corresponding path program 144 times [2020-10-05 23:14:10,715 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:10,715 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778193566] [2020-10-05 23:14:10,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:10,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:10,958 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:10,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778193566] [2020-10-05 23:14:10,958 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185270884] [2020-10-05 23:14:10,958 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:11,008 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:14:11,009 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:11,010 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:11,010 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:11,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:11,043 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:11,043 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:11,043 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:11,043 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481337769] [2020-10-05 23:14:11,044 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:11,044 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:11,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:11,044 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=340, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:11,044 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:11,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:11,642 INFO L93 Difference]: Finished difference Result 117 states and 277 transitions. [2020-10-05 23:14:11,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:14:11,642 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:11,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:11,643 INFO L225 Difference]: With dead ends: 117 [2020-10-05 23:14:11,643 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 23:14:11,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=465, Invalid=1257, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:14:11,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 23:14:11,647 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 80. [2020-10-05 23:14:11,647 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:11,647 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:11,647 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:11,648 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:11,648 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:11,648 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:11,648 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:11,648 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:11,648 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:11,648 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:11,848 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-05 23:14:11,849 INFO L427 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:11,849 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:11,850 INFO L82 PathProgramCache]: Analyzing trace with hash 1038210688, now seen corresponding path program 145 times [2020-10-05 23:14:11,850 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:11,851 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [594448730] [2020-10-05 23:14:11,851 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:11,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:12,081 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:12,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [594448730] [2020-10-05 23:14:12,082 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1718527349] [2020-10-05 23:14:12,082 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:12,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:12,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:12,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:12,143 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:12,143 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:12,143 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:12,143 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [591834183] [2020-10-05 23:14:12,144 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:12,144 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:12,144 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:12,144 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:12,144 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:12,697 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:12,697 INFO L93 Difference]: Finished difference Result 114 states and 271 transitions. [2020-10-05 23:14:12,698 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:14:12,698 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:12,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:12,698 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:14:12,699 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:14:12,699 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 322 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=439, Invalid=1201, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:14:12,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:14:12,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 81. [2020-10-05 23:14:12,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:12,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:12,701 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:12,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:12,701 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:12,702 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:12,702 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:12,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:12,702 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:12,702 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:12,905 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-05 23:14:12,905 INFO L427 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:12,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:12,906 INFO L82 PathProgramCache]: Analyzing trace with hash 2023402212, now seen corresponding path program 146 times [2020-10-05 23:14:12,906 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:12,907 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870708287] [2020-10-05 23:14:12,907 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:12,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:13,137 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:13,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870708287] [2020-10-05 23:14:13,138 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [478064608] [2020-10-05 23:14:13,138 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:13,181 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:13,182 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:13,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:13,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:13,204 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:13,216 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:13,217 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:13,217 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:13,217 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651231455] [2020-10-05 23:14:13,217 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:13,217 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:13,217 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:13,217 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=347, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:13,218 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:13,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:13,930 INFO L93 Difference]: Finished difference Result 113 states and 269 transitions. [2020-10-05 23:14:13,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:14:13,930 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:13,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:13,931 INFO L225 Difference]: With dead ends: 113 [2020-10-05 23:14:13,931 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 23:14:13,932 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 390 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=497, Invalid=1395, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:14:13,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 23:14:13,933 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 80. [2020-10-05 23:14:13,933 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:13,934 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:13,934 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:13,934 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:13,934 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:13,934 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:13,935 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:13,935 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:13,935 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:13,935 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:14,143 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 144 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-05 23:14:14,144 INFO L427 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:14,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:14,144 INFO L82 PathProgramCache]: Analyzing trace with hash 406243170, now seen corresponding path program 147 times [2020-10-05 23:14:14,144 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:14,145 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2101227903] [2020-10-05 23:14:14,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:14,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:14,368 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:14,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2101227903] [2020-10-05 23:14:14,369 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [260843054] [2020-10-05 23:14:14,369 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:14,417 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:14:14,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:14,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:14,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:14,434 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:14,435 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:14,435 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:14,435 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623069246] [2020-10-05 23:14:14,435 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:14,436 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:14,436 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:14,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:14,436 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:15,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:15,057 INFO L93 Difference]: Finished difference Result 110 states and 263 transitions. [2020-10-05 23:14:15,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:14:15,058 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:15,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:15,059 INFO L225 Difference]: With dead ends: 110 [2020-10-05 23:14:15,059 INFO L226 Difference]: Without dead ends: 104 [2020-10-05 23:14:15,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=480, Invalid=1326, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:14:15,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-10-05 23:14:15,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 81. [2020-10-05 23:14:15,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:15,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:15,063 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:15,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:15,063 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:15,063 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:15,063 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:15,063 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:15,063 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:15,064 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:15,271 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 145 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-05 23:14:15,272 INFO L427 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:15,272 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:15,272 INFO L82 PathProgramCache]: Analyzing trace with hash 1663132870, now seen corresponding path program 148 times [2020-10-05 23:14:15,272 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:15,273 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792753882] [2020-10-05 23:14:15,273 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:15,278 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:15,491 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:15,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792753882] [2020-10-05 23:14:15,492 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [773543082] [2020-10-05 23:14:15,492 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:15,538 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:15,538 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:15,539 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:15,540 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:15,568 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:15,581 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:15,581 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:15,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:15,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [338598881] [2020-10-05 23:14:15,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:15,582 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:15,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:15,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=350, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:15,582 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:16,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:16,369 INFO L93 Difference]: Finished difference Result 109 states and 261 transitions. [2020-10-05 23:14:16,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:14:16,370 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:16,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:16,371 INFO L225 Difference]: With dead ends: 109 [2020-10-05 23:14:16,371 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:14:16,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 448 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=545, Invalid=1525, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:14:16,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:14:16,373 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 80. [2020-10-05 23:14:16,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:16,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:16,374 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:16,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:16,374 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:16,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:16,374 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:16,374 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:16,374 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:16,374 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:16,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:16,575 INFO L427 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:16,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:16,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1015641916, now seen corresponding path program 149 times [2020-10-05 23:14:16,576 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:16,576 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [787680302] [2020-10-05 23:14:16,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:16,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:16,787 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:16,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [787680302] [2020-10-05 23:14:16,787 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [216482328] [2020-10-05 23:14:16,788 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:16,838 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:14:16,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:16,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:16,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:16,855 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:16,855 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:16,855 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:16,855 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437943576] [2020-10-05 23:14:16,856 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:16,856 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:16,856 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:16,856 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:16,856 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:17,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:17,533 INFO L93 Difference]: Finished difference Result 106 states and 255 transitions. [2020-10-05 23:14:17,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:14:17,533 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:17,534 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:17,534 INFO L225 Difference]: With dead ends: 106 [2020-10-05 23:14:17,534 INFO L226 Difference]: Without dead ends: 100 [2020-10-05 23:14:17,535 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 440 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=537, Invalid=1443, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:14:17,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-05 23:14:17,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 81. [2020-10-05 23:14:17,536 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:17,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:17,537 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:17,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:17,537 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:17,537 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:17,537 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:17,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:17,538 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:17,538 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:17,738 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 147 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable150 [2020-10-05 23:14:17,738 INFO L427 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:17,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:17,739 INFO L82 PathProgramCache]: Analyzing trace with hash -495898840, now seen corresponding path program 150 times [2020-10-05 23:14:17,739 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:17,740 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [912588671] [2020-10-05 23:14:17,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:17,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:17,940 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:17,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [912588671] [2020-10-05 23:14:17,940 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54821354] [2020-10-05 23:14:17,940 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:17,994 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:14:17,994 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:17,995 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:17,996 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:18,017 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:18,029 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:18,030 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:18,030 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:18,030 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896861353] [2020-10-05 23:14:18,030 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:18,030 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:18,030 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:18,030 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=349, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:18,030 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:18,912 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:18,912 INFO L93 Difference]: Finished difference Result 105 states and 253 transitions. [2020-10-05 23:14:18,913 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:14:18,913 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:18,913 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:18,913 INFO L225 Difference]: With dead ends: 105 [2020-10-05 23:14:18,913 INFO L226 Difference]: Without dead ends: 99 [2020-10-05 23:14:18,914 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 510 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=609, Invalid=1647, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:14:18,914 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-10-05 23:14:18,916 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 80. [2020-10-05 23:14:18,916 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:18,916 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:18,917 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:18,917 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:18,917 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:18,917 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:18,917 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:18,918 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:18,918 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:18,918 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:19,123 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:19,124 INFO L427 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:19,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:19,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1159412390, now seen corresponding path program 151 times [2020-10-05 23:14:19,124 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:19,125 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936380635] [2020-10-05 23:14:19,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:19,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:19,331 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:19,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936380635] [2020-10-05 23:14:19,332 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1010312720] [2020-10-05 23:14:19,332 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:19,376 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:19,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:19,378 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:19,405 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:19,405 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:19,406 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:19,406 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1049202603] [2020-10-05 23:14:19,406 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:19,406 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:19,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:19,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=306, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:19,407 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:20,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:20,170 INFO L93 Difference]: Finished difference Result 102 states and 247 transitions. [2020-10-05 23:14:20,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:14:20,170 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:20,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:20,171 INFO L225 Difference]: With dead ends: 102 [2020-10-05 23:14:20,171 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 23:14:20,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 505 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=610, Invalid=1552, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:14:20,172 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 23:14:20,173 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 81. [2020-10-05 23:14:20,173 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:20,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:20,180 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:20,180 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:20,180 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:20,180 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:20,181 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:20,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:20,181 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:20,181 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:20,381 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,149 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:20,382 INFO L427 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:20,382 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:20,382 INFO L82 PathProgramCache]: Analyzing trace with hash -560715254, now seen corresponding path program 152 times [2020-10-05 23:14:20,383 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:20,383 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1200870933] [2020-10-05 23:14:20,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:20,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:20,583 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:20,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1200870933] [2020-10-05 23:14:20,583 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1922170286] [2020-10-05 23:14:20,583 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:20,628 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:20,628 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:20,629 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:20,630 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:20,652 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:20,668 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:20,669 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:20,669 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:20,669 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [459180001] [2020-10-05 23:14:20,669 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:20,669 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:20,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:20,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:20,670 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:21,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:21,636 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-10-05 23:14:21,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:14:21,636 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:21,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:21,637 INFO L225 Difference]: With dead ends: 101 [2020-10-05 23:14:21,637 INFO L226 Difference]: Without dead ends: 95 [2020-10-05 23:14:21,638 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 576 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=689, Invalid=1761, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:14:21,638 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-10-05 23:14:21,639 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 80. [2020-10-05 23:14:21,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:21,640 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:21,640 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:21,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:21,640 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:21,640 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:21,640 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:21,641 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:21,641 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:21,641 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:21,842 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable153 [2020-10-05 23:14:21,843 INFO L427 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:21,843 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:21,843 INFO L82 PathProgramCache]: Analyzing trace with hash -89719544, now seen corresponding path program 153 times [2020-10-05 23:14:21,844 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:21,844 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1980671226] [2020-10-05 23:14:21,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:21,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:22,046 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:22,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1980671226] [2020-10-05 23:14:22,047 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [243836938] [2020-10-05 23:14:22,047 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:22,098 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-10-05 23:14:22,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:22,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:22,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:22,120 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:22,121 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:22,121 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:22,121 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [618070977] [2020-10-05 23:14:22,121 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:22,122 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:22,122 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:22,122 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:22,122 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:22,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:22,925 INFO L93 Difference]: Finished difference Result 98 states and 239 transitions. [2020-10-05 23:14:22,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:14:22,925 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:22,926 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:22,926 INFO L225 Difference]: With dead ends: 98 [2020-10-05 23:14:22,926 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 23:14:22,927 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 574 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=699, Invalid=1653, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:14:22,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 23:14:22,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 81. [2020-10-05 23:14:22,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:22,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:22,929 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-10-05 23:14:22,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:22,929 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:22,929 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:22,929 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:22,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:22,930 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:22,930 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:23,130 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,151 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:23,131 INFO L427 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:23,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:23,131 INFO L82 PathProgramCache]: Analyzing trace with hash -73632404, now seen corresponding path program 154 times [2020-10-05 23:14:23,131 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:23,132 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1716431145] [2020-10-05 23:14:23,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:23,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:23,327 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:23,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1716431145] [2020-10-05 23:14:23,328 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1720988181] [2020-10-05 23:14:23,328 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:23,373 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:23,373 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:23,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:23,375 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:23,397 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:23,415 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:23,415 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:23,415 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:23,415 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560507600] [2020-10-05 23:14:23,416 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:23,416 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:23,416 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:23,416 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=335, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:23,416 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 21 states. [2020-10-05 23:14:24,498 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:24,498 INFO L93 Difference]: Finished difference Result 97 states and 237 transitions. [2020-10-05 23:14:24,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:14:24,499 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:24,499 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:24,500 INFO L225 Difference]: With dead ends: 97 [2020-10-05 23:14:24,500 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 23:14:24,501 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 646 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=785, Invalid=1867, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:14:24,501 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 23:14:24,502 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 80. [2020-10-05 23:14:24,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:24,503 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:24,503 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 24 [2020-10-05 23:14:24,503 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:24,503 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:24,503 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:24,504 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:24,504 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:24,504 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:24,504 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:24,704 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-05 23:14:24,705 INFO L427 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:24,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:24,705 INFO L82 PathProgramCache]: Analyzing trace with hash -73142294, now seen corresponding path program 155 times [2020-10-05 23:14:24,706 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:24,706 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1983156916] [2020-10-05 23:14:24,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:24,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:24,909 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:24,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1983156916] [2020-10-05 23:14:24,910 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1353142808] [2020-10-05 23:14:24,910 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:24,958 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-10-05 23:14:24,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:24,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:24,959 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:24,979 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:24,979 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:24,980 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-10-05 23:14:24,980 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077642363] [2020-10-05 23:14:24,980 INFO L459 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-10-05 23:14:24,980 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:24,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-10-05 23:14:24,981 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-10-05 23:14:24,981 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-10-05 23:14:25,857 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:25,857 INFO L93 Difference]: Finished difference Result 113 states and 277 transitions. [2020-10-05 23:14:25,858 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:25,858 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 24 [2020-10-05 23:14:25,859 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:25,859 INFO L225 Difference]: With dead ends: 113 [2020-10-05 23:14:25,859 INFO L226 Difference]: Without dead ends: 107 [2020-10-05 23:14:25,860 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 647 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=804, Invalid=1746, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:14:25,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-10-05 23:14:25,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 84. [2020-10-05 23:14:25,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-05 23:14:25,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-10-05 23:14:25,862 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 24 [2020-10-05 23:14:25,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:25,862 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-10-05 23:14:25,862 INFO L480 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-10-05 23:14:25,862 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-10-05 23:14:25,863 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:25,863 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:25,863 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:26,063 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 153 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-05 23:14:26,064 INFO L427 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:26,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:26,064 INFO L82 PathProgramCache]: Analyzing trace with hash -73125554, now seen corresponding path program 156 times [2020-10-05 23:14:26,064 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:26,065 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139768758] [2020-10-05 23:14:26,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:26,071 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:26,275 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:26,275 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139768758] [2020-10-05 23:14:26,276 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1858823986] [2020-10-05 23:14:26,276 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:26,355 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-10-05 23:14:26,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:26,356 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:26,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:26,391 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:26,409 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:26,409 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:26,410 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:26,410 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144028274] [2020-10-05 23:14:26,410 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:26,410 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:26,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:26,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:26,411 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-10-05 23:14:27,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:27,536 INFO L93 Difference]: Finished difference Result 94 states and 233 transitions. [2020-10-05 23:14:27,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:14:27,537 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:27,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:27,537 INFO L225 Difference]: With dead ends: 94 [2020-10-05 23:14:27,537 INFO L226 Difference]: Without dead ends: 86 [2020-10-05 23:14:27,538 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:14:27,538 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-10-05 23:14:27,539 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-10-05 23:14:27,539 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 61 states. [2020-10-05 23:14:27,540 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-10-05 23:14:27,540 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-10-05 23:14:27,540 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:27,540 INFO L479 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-10-05 23:14:27,540 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:27,540 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-10-05 23:14:27,541 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-10-05 23:14:27,541 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:27,541 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:27,741 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 154 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-05 23:14:27,742 INFO L427 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:27,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:27,742 INFO L82 PathProgramCache]: Analyzing trace with hash 1614805552, now seen corresponding path program 157 times [2020-10-05 23:14:27,742 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:27,743 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098235201] [2020-10-05 23:14:27,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:27,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:27,927 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:27,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098235201] [2020-10-05 23:14:27,927 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1023476937] [2020-10-05 23:14:27,927 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:27,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:27,973 INFO L263 TraceCheckSpWp]: Trace formula consists of 144 conjuncts, 20 conjunts are in the unsatisfiable core [2020-10-05 23:14:27,974 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:27,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:14:28,018 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:28,019 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:28,019 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-10-05 23:14:28,019 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282910044] [2020-10-05 23:14:28,019 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:28,019 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:28,020 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:28,020 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand 21 states. [2020-10-05 23:14:29,059 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:29,059 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-05 23:14:29,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:29,060 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-10-05 23:14:29,060 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:29,061 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:14:29,061 INFO L226 Difference]: Without dead ends: 103 [2020-10-05 23:14:29,061 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:14:29,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-10-05 23:14:29,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-10-05 23:14:29,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:14:29,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-05 23:14:29,063 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-10-05 23:14:29,064 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:29,064 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-05 23:14:29,064 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:29,064 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-05 23:14:29,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:29,064 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:29,064 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:29,264 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-05 23:14:29,265 INFO L427 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:29,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:29,266 INFO L82 PathProgramCache]: Analyzing trace with hash 2028091429, now seen corresponding path program 158 times [2020-10-05 23:14:29,266 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:29,266 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1855074345] [2020-10-05 23:14:29,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:29,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:29,482 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:29,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1855074345] [2020-10-05 23:14:29,482 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [706184495] [2020-10-05 23:14:29,482 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:29,527 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:29,527 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:29,528 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:29,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:29,559 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:14:29,578 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:29,578 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:29,579 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:29,579 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1245240444] [2020-10-05 23:14:29,579 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:29,579 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:29,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:29,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:29,580 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 22 states. [2020-10-05 23:14:30,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:30,711 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-10-05 23:14:30,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:30,712 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:30,712 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:30,713 INFO L225 Difference]: With dead ends: 90 [2020-10-05 23:14:30,713 INFO L226 Difference]: Without dead ends: 85 [2020-10-05 23:14:30,713 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:14:30,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-10-05 23:14:30,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-10-05 23:14:30,715 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-10-05 23:14:30,715 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-10-05 23:14:30,715 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-10-05 23:14:30,715 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:30,715 INFO L479 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-10-05 23:14:30,715 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:30,716 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-10-05 23:14:30,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:30,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:30,716 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:30,916 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:30,917 INFO L427 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:30,917 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:30,917 INFO L82 PathProgramCache]: Analyzing trace with hash 674366672, now seen corresponding path program 159 times [2020-10-05 23:14:30,917 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:30,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [509259819] [2020-10-05 23:14:30,918 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:30,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:31,197 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:31,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [509259819] [2020-10-05 23:14:31,197 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [836638711] [2020-10-05 23:14:31,197 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:31,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:14:31,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:31,252 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:31,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:31,262 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:31,263 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:31,263 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:31,263 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783574957] [2020-10-05 23:14:31,263 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:31,263 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:31,263 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:31,263 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:31,263 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 21 states. [2020-10-05 23:14:31,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:31,740 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-10-05 23:14:31,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-05 23:14:31,741 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:31,741 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:31,741 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:14:31,741 INFO L226 Difference]: Without dead ends: 90 [2020-10-05 23:14:31,741 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-10-05 23:14:31,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-05 23:14:31,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-10-05 23:14:31,743 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:14:31,743 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-10-05 23:14:31,743 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-10-05 23:14:31,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:31,744 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-10-05 23:14:31,744 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:31,744 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-10-05 23:14:31,744 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:31,744 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:31,744 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:31,945 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:31,945 INFO L427 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:31,945 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:31,946 INFO L82 PathProgramCache]: Analyzing trace with hash -873791948, now seen corresponding path program 160 times [2020-10-05 23:14:31,946 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:31,946 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1125373648] [2020-10-05 23:14:31,946 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:31,951 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:32,241 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:32,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1125373648] [2020-10-05 23:14:32,241 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359804946] [2020-10-05 23:14:32,242 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:32,287 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:32,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:32,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:32,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:32,310 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:32,320 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:32,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:32,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:32,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [944999439] [2020-10-05 23:14:32,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:32,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:32,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:32,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:32,322 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand 22 states. [2020-10-05 23:14:32,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:32,844 INFO L93 Difference]: Finished difference Result 114 states and 259 transitions. [2020-10-05 23:14:32,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-05 23:14:32,845 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:32,845 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:32,846 INFO L225 Difference]: With dead ends: 114 [2020-10-05 23:14:32,846 INFO L226 Difference]: Without dead ends: 108 [2020-10-05 23:14:32,846 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 61 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 283 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=462, Invalid=1098, Unknown=0, NotChecked=0, Total=1560 [2020-10-05 23:14:32,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-05 23:14:32,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 68. [2020-10-05 23:14:32,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-10-05 23:14:32,848 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-10-05 23:14:32,848 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 25 [2020-10-05 23:14:32,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:32,849 INFO L479 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-10-05 23:14:32,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:32,849 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-10-05 23:14:32,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:32,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:32,849 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:33,049 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:33,050 INFO L427 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:33,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:33,050 INFO L82 PathProgramCache]: Analyzing trace with hash 2119386162, now seen corresponding path program 161 times [2020-10-05 23:14:33,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:33,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088623067] [2020-10-05 23:14:33,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:33,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:33,357 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:33,357 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088623067] [2020-10-05 23:14:33,358 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1302126628] [2020-10-05 23:14:33,358 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:33,410 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:14:33,410 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:33,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:33,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:33,426 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:33,426 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:33,426 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:33,426 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035720811] [2020-10-05 23:14:33,426 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:33,427 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:33,427 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:33,427 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:33,427 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 21 states. [2020-10-05 23:14:34,001 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:34,002 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-10-05 23:14:34,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:14:34,002 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:34,002 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:34,003 INFO L225 Difference]: With dead ends: 115 [2020-10-05 23:14:34,003 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 23:14:34,003 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 290 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:14:34,004 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 23:14:34,005 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 71. [2020-10-05 23:14:34,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-05 23:14:34,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 175 transitions. [2020-10-05 23:14:34,005 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 175 transitions. Word has length 25 [2020-10-05 23:14:34,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:34,006 INFO L479 AbstractCegarLoop]: Abstraction has 71 states and 175 transitions. [2020-10-05 23:14:34,006 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:34,006 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 175 transitions. [2020-10-05 23:14:34,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:34,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:34,006 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:34,206 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,159 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:34,207 INFO L427 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:34,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:34,207 INFO L82 PathProgramCache]: Analyzing trace with hash 1308837526, now seen corresponding path program 162 times [2020-10-05 23:14:34,208 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:34,208 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105470484] [2020-10-05 23:14:34,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:34,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:34,503 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:34,503 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105470484] [2020-10-05 23:14:34,504 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694908078] [2020-10-05 23:14:34,504 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:34,556 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:14:34,556 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:34,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:34,557 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:34,579 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:34,592 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:34,593 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:34,593 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:34,593 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521823189] [2020-10-05 23:14:34,593 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:34,593 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:34,593 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:34,593 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:34,594 INFO L87 Difference]: Start difference. First operand 71 states and 175 transitions. Second operand 22 states. [2020-10-05 23:14:35,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:35,174 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-10-05 23:14:35,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:14:35,175 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:35,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:35,176 INFO L225 Difference]: With dead ends: 129 [2020-10-05 23:14:35,176 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 23:14:35,176 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 364 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=500, Invalid=1306, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:14:35,177 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 23:14:35,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 70. [2020-10-05 23:14:35,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-10-05 23:14:35,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-10-05 23:14:35,178 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 25 [2020-10-05 23:14:35,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:35,179 INFO L479 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-10-05 23:14:35,179 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:35,179 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-10-05 23:14:35,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:35,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:35,179 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:35,383 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,160 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:35,384 INFO L427 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:35,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:35,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1361114132, now seen corresponding path program 163 times [2020-10-05 23:14:35,384 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:35,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121445820] [2020-10-05 23:14:35,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:35,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:35,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:35,650 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121445820] [2020-10-05 23:14:35,651 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [536683017] [2020-10-05 23:14:35,651 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:35,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:35,703 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:35,704 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:35,716 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:35,717 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:35,717 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:35,717 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2100095651] [2020-10-05 23:14:35,717 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:35,717 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:35,717 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:35,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:35,718 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 21 states. [2020-10-05 23:14:36,341 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:36,341 INFO L93 Difference]: Finished difference Result 129 states and 293 transitions. [2020-10-05 23:14:36,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:14:36,342 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:36,343 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:36,343 INFO L225 Difference]: With dead ends: 129 [2020-10-05 23:14:36,343 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 23:14:36,344 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:14:36,344 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 23:14:36,345 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 73. [2020-10-05 23:14:36,345 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-10-05 23:14:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 181 transitions. [2020-10-05 23:14:36,346 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 181 transitions. Word has length 25 [2020-10-05 23:14:36,346 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:36,346 INFO L479 AbstractCegarLoop]: Abstraction has 73 states and 181 transitions. [2020-10-05 23:14:36,346 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:36,346 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 181 transitions. [2020-10-05 23:14:36,346 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:36,347 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:36,347 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:36,547 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,161 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:36,547 INFO L427 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:36,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:36,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1057603720, now seen corresponding path program 164 times [2020-10-05 23:14:36,548 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:36,548 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062910571] [2020-10-05 23:14:36,549 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:36,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:36,820 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:36,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062910571] [2020-10-05 23:14:36,821 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [374577219] [2020-10-05 23:14:36,821 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:36,868 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:36,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:36,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:36,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:36,893 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:36,912 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:36,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:36,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:36,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1696182674] [2020-10-05 23:14:36,913 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:36,913 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:36,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:36,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:36,914 INFO L87 Difference]: Start difference. First operand 73 states and 181 transitions. Second operand 22 states. [2020-10-05 23:14:37,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:37,631 INFO L93 Difference]: Finished difference Result 126 states and 287 transitions. [2020-10-05 23:14:37,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:14:37,632 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:37,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:37,632 INFO L225 Difference]: With dead ends: 126 [2020-10-05 23:14:37,633 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 23:14:37,633 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=523, Invalid=1457, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:14:37,634 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 23:14:37,635 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-10-05 23:14:37,635 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:14:37,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-10-05 23:14:37,636 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 25 [2020-10-05 23:14:37,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:37,636 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-10-05 23:14:37,636 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:37,636 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-10-05 23:14:37,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:37,637 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:37,637 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:37,838 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165,162 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:37,839 INFO L427 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:37,839 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:37,839 INFO L82 PathProgramCache]: Analyzing trace with hash -369281930, now seen corresponding path program 165 times [2020-10-05 23:14:37,839 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:37,840 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470101869] [2020-10-05 23:14:37,840 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:37,845 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:38,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470101869] [2020-10-05 23:14:38,094 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732018596] [2020-10-05 23:14:38,094 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:38,146 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:14:38,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:38,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:38,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:38,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:38,164 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:38,164 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:38,164 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [497507494] [2020-10-05 23:14:38,164 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:38,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:38,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:38,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:38,164 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 21 states. [2020-10-05 23:14:38,845 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:38,845 INFO L93 Difference]: Finished difference Result 127 states and 291 transitions. [2020-10-05 23:14:38,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:14:38,846 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:38,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:38,847 INFO L225 Difference]: With dead ends: 127 [2020-10-05 23:14:38,847 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 23:14:38,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 458 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:14:38,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 23:14:38,849 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 75. [2020-10-05 23:14:38,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:14:38,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 187 transitions. [2020-10-05 23:14:38,849 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 187 transitions. Word has length 25 [2020-10-05 23:14:38,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:38,849 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 187 transitions. [2020-10-05 23:14:38,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:38,849 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 187 transitions. [2020-10-05 23:14:38,850 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:38,850 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:38,850 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:39,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-05 23:14:39,051 INFO L427 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:39,051 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:39,051 INFO L82 PathProgramCache]: Analyzing trace with hash 615909594, now seen corresponding path program 166 times [2020-10-05 23:14:39,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:39,052 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [781281938] [2020-10-05 23:14:39,052 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:39,057 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:39,309 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:39,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [781281938] [2020-10-05 23:14:39,310 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183622257] [2020-10-05 23:14:39,310 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:39,356 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:39,356 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:39,357 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:39,357 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:39,381 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:39,396 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:39,396 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:39,396 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:39,396 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [45457329] [2020-10-05 23:14:39,397 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:39,397 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:39,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:39,397 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:39,397 INFO L87 Difference]: Start difference. First operand 75 states and 187 transitions. Second operand 22 states. [2020-10-05 23:14:40,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:40,199 INFO L93 Difference]: Finished difference Result 124 states and 285 transitions. [2020-10-05 23:14:40,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:14:40,200 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:40,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:40,200 INFO L225 Difference]: With dead ends: 124 [2020-10-05 23:14:40,201 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 23:14:40,201 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 471 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1600, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:14:40,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 23:14:40,203 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 74. [2020-10-05 23:14:40,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:14:40,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-10-05 23:14:40,203 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 25 [2020-10-05 23:14:40,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:40,203 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-10-05 23:14:40,203 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:40,203 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-10-05 23:14:40,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:40,204 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:40,204 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:40,404 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-05 23:14:40,404 INFO L427 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:40,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:40,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1001249448, now seen corresponding path program 167 times [2020-10-05 23:14:40,405 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:40,406 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904286840] [2020-10-05 23:14:40,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:40,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:40,658 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:40,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904286840] [2020-10-05 23:14:40,658 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171537537] [2020-10-05 23:14:40,659 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:40,707 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:14:40,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:40,709 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:40,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:40,725 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:40,725 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:40,726 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:40,726 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [768752769] [2020-10-05 23:14:40,726 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:40,726 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:40,726 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:40,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:40,727 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 21 states. [2020-10-05 23:14:41,497 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:41,497 INFO L93 Difference]: Finished difference Result 125 states and 289 transitions. [2020-10-05 23:14:41,498 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:14:41,498 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:41,498 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:41,498 INFO L225 Difference]: With dead ends: 125 [2020-10-05 23:14:41,499 INFO L226 Difference]: Without dead ends: 119 [2020-10-05 23:14:41,499 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:14:41,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-10-05 23:14:41,500 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 77. [2020-10-05 23:14:41,500 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 23:14:41,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 193 transitions. [2020-10-05 23:14:41,501 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 193 transitions. Word has length 25 [2020-10-05 23:14:41,501 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:41,501 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 193 transitions. [2020-10-05 23:14:41,501 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:41,501 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 193 transitions. [2020-10-05 23:14:41,502 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:41,502 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:41,502 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:41,702 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 165 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-05 23:14:41,703 INFO L427 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:41,703 INFO L82 PathProgramCache]: Analyzing trace with hash 255640252, now seen corresponding path program 168 times [2020-10-05 23:14:41,704 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:41,704 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1868720817] [2020-10-05 23:14:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:41,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:41,951 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:41,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1868720817] [2020-10-05 23:14:41,952 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [824067707] [2020-10-05 23:14:41,952 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:42,004 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:14:42,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:42,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:42,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:42,030 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:42,044 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:42,044 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:42,045 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:42,045 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1668313228] [2020-10-05 23:14:42,045 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:42,045 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:42,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:42,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=386, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:42,045 INFO L87 Difference]: Start difference. First operand 77 states and 193 transitions. Second operand 22 states. [2020-10-05 23:14:42,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:42,960 INFO L93 Difference]: Finished difference Result 122 states and 283 transitions. [2020-10-05 23:14:42,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:14:42,961 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:42,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:42,962 INFO L225 Difference]: With dead ends: 122 [2020-10-05 23:14:42,962 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 23:14:42,962 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=617, Invalid=1735, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:14:42,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 23:14:42,964 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 76. [2020-10-05 23:14:42,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:14:42,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-10-05 23:14:42,964 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 25 [2020-10-05 23:14:42,965 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:42,965 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-10-05 23:14:42,965 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:42,965 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-10-05 23:14:42,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:42,965 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:42,966 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:43,166 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 166 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-05 23:14:43,167 INFO L427 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:43,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:43,168 INFO L82 PathProgramCache]: Analyzing trace with hash 1871832762, now seen corresponding path program 169 times [2020-10-05 23:14:43,168 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:43,168 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1456711586] [2020-10-05 23:14:43,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:43,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:43,404 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:43,404 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1456711586] [2020-10-05 23:14:43,405 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1251454867] [2020-10-05 23:14:43,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:43,450 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:43,451 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:43,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:43,469 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:43,469 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:43,469 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:43,469 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [483191878] [2020-10-05 23:14:43,469 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:43,469 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:43,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:43,470 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 21 states. [2020-10-05 23:14:44,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:44,280 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-05 23:14:44,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:14:44,281 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:44,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:44,281 INFO L225 Difference]: With dead ends: 123 [2020-10-05 23:14:44,282 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 23:14:44,282 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 609 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:14:44,282 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 23:14:44,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 79. [2020-10-05 23:14:44,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 23:14:44,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-10-05 23:14:44,284 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 25 [2020-10-05 23:14:44,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:44,284 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-10-05 23:14:44,284 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:44,284 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-10-05 23:14:44,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:44,285 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:44,285 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:44,485 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:44,485 INFO L427 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:44,486 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:44,486 INFO L82 PathProgramCache]: Analyzing trace with hash -1903391458, now seen corresponding path program 170 times [2020-10-05 23:14:44,486 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:44,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [368971337] [2020-10-05 23:14:44,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:44,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:44,727 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:44,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [368971337] [2020-10-05 23:14:44,727 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [781942413] [2020-10-05 23:14:44,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:44,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:44,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:44,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:44,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:44,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:44,812 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:44,813 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:44,813 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:44,813 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955923549] [2020-10-05 23:14:44,813 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:44,813 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:44,813 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:44,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=384, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:44,814 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 22 states. [2020-10-05 23:14:45,791 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:45,791 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-10-05 23:14:45,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:14:45,792 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:45,792 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:45,792 INFO L225 Difference]: With dead ends: 120 [2020-10-05 23:14:45,792 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 23:14:45,792 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 616 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=688, Invalid=1862, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:14:45,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 23:14:45,794 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 78. [2020-10-05 23:14:45,794 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 23:14:45,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 197 transitions. [2020-10-05 23:14:45,794 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 197 transitions. Word has length 25 [2020-10-05 23:14:45,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:45,794 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 197 transitions. [2020-10-05 23:14:45,795 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:45,795 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 197 transitions. [2020-10-05 23:14:45,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:45,795 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:45,795 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:45,995 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:45,996 INFO L427 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:45,996 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:45,996 INFO L82 PathProgramCache]: Analyzing trace with hash -248080228, now seen corresponding path program 171 times [2020-10-05 23:14:45,997 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:45,997 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640273790] [2020-10-05 23:14:45,997 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:46,003 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:46,221 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:46,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640273790] [2020-10-05 23:14:46,221 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1882493253] [2020-10-05 23:14:46,221 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:46,272 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:14:46,273 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:46,274 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:46,275 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:46,294 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:46,294 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:46,295 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:46,295 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723462201] [2020-10-05 23:14:46,295 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:46,295 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:46,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:46,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:46,295 INFO L87 Difference]: Start difference. First operand 78 states and 197 transitions. Second operand 21 states. [2020-10-05 23:14:47,172 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:47,172 INFO L93 Difference]: Finished difference Result 121 states and 285 transitions. [2020-10-05 23:14:47,173 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:14:47,173 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:47,173 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:47,173 INFO L225 Difference]: With dead ends: 121 [2020-10-05 23:14:47,173 INFO L226 Difference]: Without dead ends: 115 [2020-10-05 23:14:47,174 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 691 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:14:47,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-05 23:14:47,175 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 81. [2020-10-05 23:14:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:14:47,176 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-10-05 23:14:47,176 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 25 [2020-10-05 23:14:47,176 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:47,176 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-10-05 23:14:47,177 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:47,177 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-10-05 23:14:47,177 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:47,177 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:47,177 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:47,378 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 169 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable172 [2020-10-05 23:14:47,378 INFO L427 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:47,378 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:47,379 INFO L82 PathProgramCache]: Analyzing trace with hash -1968207872, now seen corresponding path program 172 times [2020-10-05 23:14:47,379 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:47,379 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773246298] [2020-10-05 23:14:47,379 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:47,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:47,607 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:47,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773246298] [2020-10-05 23:14:47,608 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2136847470] [2020-10-05 23:14:47,608 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:47,653 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:47,653 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:47,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:47,654 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:47,686 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:47,701 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:47,701 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:47,701 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:47,701 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1610852615] [2020-10-05 23:14:47,702 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:47,702 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:47,702 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:47,702 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:47,702 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand 22 states. [2020-10-05 23:14:48,780 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:48,780 INFO L93 Difference]: Finished difference Result 118 states and 279 transitions. [2020-10-05 23:14:48,780 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:14:48,781 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:48,781 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:48,781 INFO L225 Difference]: With dead ends: 118 [2020-10-05 23:14:48,781 INFO L226 Difference]: Without dead ends: 112 [2020-10-05 23:14:48,781 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=775, Invalid=1981, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 23:14:48,782 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-05 23:14:48,783 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-10-05 23:14:48,783 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:14:48,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-10-05 23:14:48,784 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 25 [2020-10-05 23:14:48,784 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:48,784 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-10-05 23:14:48,784 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:48,784 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-10-05 23:14:48,784 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:48,784 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:48,784 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:48,985 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:48,985 INFO L427 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:48,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:48,985 INFO L82 PathProgramCache]: Analyzing trace with hash -1497212162, now seen corresponding path program 173 times [2020-10-05 23:14:48,986 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:48,986 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1746069758] [2020-10-05 23:14:48,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:48,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:49,203 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:49,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1746069758] [2020-10-05 23:14:49,204 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1711608635] [2020-10-05 23:14:49,204 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:49,254 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:14:49,254 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:49,255 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:49,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:49,277 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:49,278 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:49,278 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:49,278 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [780859423] [2020-10-05 23:14:49,279 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:49,279 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:49,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:49,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:49,279 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 21 states. [2020-10-05 23:14:50,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:50,331 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-10-05 23:14:50,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 23:14:50,332 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:50,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:50,333 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:14:50,333 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:14:50,334 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 777 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:14:50,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:14:50,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 83. [2020-10-05 23:14:50,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 23:14:50,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 211 transitions. [2020-10-05 23:14:50,337 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 211 transitions. Word has length 25 [2020-10-05 23:14:50,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:50,337 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 211 transitions. [2020-10-05 23:14:50,337 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:50,337 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 211 transitions. [2020-10-05 23:14:50,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:50,337 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:50,338 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:50,545 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,171 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:50,546 INFO L427 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:50,546 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:50,546 INFO L82 PathProgramCache]: Analyzing trace with hash -1481125022, now seen corresponding path program 174 times [2020-10-05 23:14:50,546 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:50,547 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1172213391] [2020-10-05 23:14:50,547 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:50,553 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:50,774 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:50,774 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1172213391] [2020-10-05 23:14:50,775 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015133643] [2020-10-05 23:14:50,775 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:50,824 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:14:50,824 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:50,825 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:50,826 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:50,858 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:50,882 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:50,883 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:50,883 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:50,883 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [121782061] [2020-10-05 23:14:50,884 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:50,884 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:50,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:50,884 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=368, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:50,885 INFO L87 Difference]: Start difference. First operand 83 states and 211 transitions. Second operand 22 states. [2020-10-05 23:14:52,087 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:52,087 INFO L93 Difference]: Finished difference Result 116 states and 277 transitions. [2020-10-05 23:14:52,088 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:14:52,088 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:52,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:52,089 INFO L225 Difference]: With dead ends: 116 [2020-10-05 23:14:52,089 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 23:14:52,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 778 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=878, Invalid=2092, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:14:52,090 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 23:14:52,091 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 82. [2020-10-05 23:14:52,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:14:52,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-10-05 23:14:52,092 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 25 [2020-10-05 23:14:52,092 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:52,092 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-10-05 23:14:52,092 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:52,092 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-10-05 23:14:52,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:52,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:52,093 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:52,293 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:52,294 INFO L427 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:52,294 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:52,294 INFO L82 PathProgramCache]: Analyzing trace with hash -1480634912, now seen corresponding path program 175 times [2020-10-05 23:14:52,295 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:52,295 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [43978020] [2020-10-05 23:14:52,295 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:52,300 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:52,511 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:52,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [43978020] [2020-10-05 23:14:52,512 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [168710224] [2020-10-05 23:14:52,512 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:52,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:52,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:52,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:52,581 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:52,582 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:52,582 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-10-05 23:14:52,582 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1128831058] [2020-10-05 23:14:52,582 INFO L459 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-10-05 23:14:52,583 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:52,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-10-05 23:14:52,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-10-05 23:14:52,583 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand 21 states. [2020-10-05 23:14:53,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:53,585 INFO L93 Difference]: Finished difference Result 136 states and 327 transitions. [2020-10-05 23:14:53,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:14:53,586 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-10-05 23:14:53,587 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:53,587 INFO L225 Difference]: With dead ends: 136 [2020-10-05 23:14:53,587 INFO L226 Difference]: Without dead ends: 130 [2020-10-05 23:14:53,588 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 867 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 23:14:53,589 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-05 23:14:53,591 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 88. [2020-10-05 23:14:53,591 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 23:14:53,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 229 transitions. [2020-10-05 23:14:53,591 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 229 transitions. Word has length 25 [2020-10-05 23:14:53,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:53,592 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 229 transitions. [2020-10-05 23:14:53,592 INFO L480 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-10-05 23:14:53,592 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 229 transitions. [2020-10-05 23:14:53,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-10-05 23:14:53,592 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:53,592 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:53,800 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,173 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:53,800 INFO L427 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:53,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:53,801 INFO L82 PathProgramCache]: Analyzing trace with hash -1480618172, now seen corresponding path program 176 times [2020-10-05 23:14:53,801 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:53,801 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [15016056] [2020-10-05 23:14:53,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:53,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:54,033 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:54,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [15016056] [2020-10-05 23:14:54,034 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1267251864] [2020-10-05 23:14:54,034 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:54,078 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:14:54,078 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:54,079 INFO L263 TraceCheckSpWp]: Trace formula consists of 149 conjuncts, 21 conjunts are in the unsatisfiable core [2020-10-05 23:14:54,079 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:54,103 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:54,119 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:54,120 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:54,120 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-10-05 23:14:54,120 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1528805079] [2020-10-05 23:14:54,120 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:54,120 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:54,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:54,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:54,121 INFO L87 Difference]: Start difference. First operand 88 states and 229 transitions. Second operand 22 states. [2020-10-05 23:14:55,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:55,349 INFO L93 Difference]: Finished difference Result 117 states and 283 transitions. [2020-10-05 23:14:55,349 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 23:14:55,349 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-10-05 23:14:55,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:55,350 INFO L225 Difference]: With dead ends: 117 [2020-10-05 23:14:55,350 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 23:14:55,350 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 23:14:55,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 23:14:55,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 85. [2020-10-05 23:14:55,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-05 23:14:55,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-10-05 23:14:55,353 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-10-05 23:14:55,353 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:55,353 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-10-05 23:14:55,354 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:55,354 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-10-05 23:14:55,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:14:55,354 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:55,354 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:55,554 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:55,555 INFO L427 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:55,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:55,555 INFO L82 PathProgramCache]: Analyzing trace with hash 601326971, now seen corresponding path program 177 times [2020-10-05 23:14:55,556 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:55,556 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1875946684] [2020-10-05 23:14:55,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:55,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:55,890 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:55,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1875946684] [2020-10-05 23:14:55,891 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762841381] [2020-10-05 23:14:55,891 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:55,943 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:14:55,943 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:55,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:14:55,945 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:55,957 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:55,957 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:55,957 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:14:55,957 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1525657011] [2020-10-05 23:14:55,958 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:55,958 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:55,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:55,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:55,958 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand 22 states. [2020-10-05 23:14:56,540 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:56,540 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-10-05 23:14:56,541 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:14:56,541 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:14:56,541 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:56,542 INFO L225 Difference]: With dead ends: 134 [2020-10-05 23:14:56,542 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 23:14:56,542 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-10-05 23:14:56,543 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 23:14:56,544 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-10-05 23:14:56,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:14:56,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:14:56,545 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:14:56,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:56,545 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:14:56,545 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:56,545 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:14:56,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:14:56,545 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:56,546 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:56,746 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 175 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable178 [2020-10-05 23:14:56,746 INFO L427 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:56,747 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:56,747 INFO L82 PathProgramCache]: Analyzing trace with hash -946831649, now seen corresponding path program 178 times [2020-10-05 23:14:56,747 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:56,748 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666688294] [2020-10-05 23:14:56,748 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:56,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:57,084 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:57,084 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666688294] [2020-10-05 23:14:57,085 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [578219632] [2020-10-05 23:14:57,085 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:57,129 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:14:57,129 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:57,130 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:14:57,131 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:57,155 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:57,167 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:57,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:57,168 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:14:57,168 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32461867] [2020-10-05 23:14:57,168 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:14:57,168 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:57,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:14:57,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:14:57,169 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:14:57,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:57,845 INFO L93 Difference]: Finished difference Result 131 states and 309 transitions. [2020-10-05 23:14:57,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:14:57,845 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:14:57,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:57,846 INFO L225 Difference]: With dead ends: 131 [2020-10-05 23:14:57,846 INFO L226 Difference]: Without dead ends: 125 [2020-10-05 23:14:57,847 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 351 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=546, Invalid=1346, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:14:57,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-05 23:14:57,848 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 86. [2020-10-05 23:14:57,848 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:14:57,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:14:57,849 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:14:57,849 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:57,849 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:14:57,849 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:14:57,849 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:14:57,849 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:14:57,849 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:57,849 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:58,050 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-05 23:14:58,050 INFO L427 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:58,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:58,051 INFO L82 PathProgramCache]: Analyzing trace with hash 2046346461, now seen corresponding path program 179 times [2020-10-05 23:14:58,051 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:58,051 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13385401] [2020-10-05 23:14:58,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:58,056 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:58,364 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:58,364 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13385401] [2020-10-05 23:14:58,365 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900548124] [2020-10-05 23:14:58,365 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:58,415 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:14:58,415 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:58,416 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:14:58,417 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:58,437 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:58,437 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:58,438 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:14:58,438 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647310933] [2020-10-05 23:14:58,438 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:14:58,438 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:58,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:14:58,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:14:58,439 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:14:59,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:14:59,070 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-10-05 23:14:59,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-05 23:14:59,071 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:14:59,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:14:59,072 INFO L225 Difference]: With dead ends: 128 [2020-10-05 23:14:59,072 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 23:14:59,073 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 330 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-10-05 23:14:59,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 23:14:59,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 87. [2020-10-05 23:14:59,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:14:59,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:14:59,075 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:14:59,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:14:59,075 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:14:59,075 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:14:59,075 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:14:59,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:14:59,076 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:14:59,076 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:14:59,276 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:14:59,277 INFO L427 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:14:59,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:14:59,277 INFO L82 PathProgramCache]: Analyzing trace with hash 1235797825, now seen corresponding path program 180 times [2020-10-05 23:14:59,277 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:14:59,278 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1466668789] [2020-10-05 23:14:59,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:14:59,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:14:59,600 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:59,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1466668789] [2020-10-05 23:14:59,600 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [687560193] [2020-10-05 23:14:59,600 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:14:59,655 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:14:59,655 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:14:59,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:14:59,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:14:59,684 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:14:59,697 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:14:59,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:14:59,698 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:14:59,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2076808044] [2020-10-05 23:14:59,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:14:59,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:14:59,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:14:59,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=409, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:14:59,699 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:00,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:00,455 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-10-05 23:15:00,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:15:00,456 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:00,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:00,456 INFO L225 Difference]: With dead ends: 127 [2020-10-05 23:15:00,457 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 23:15:00,457 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 406 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=560, Invalid=1510, Unknown=0, NotChecked=0, Total=2070 [2020-10-05 23:15:00,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 23:15:00,459 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 86. [2020-10-05 23:15:00,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:00,459 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:00,459 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:00,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:00,459 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:00,459 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:00,459 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:00,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:00,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:00,460 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:00,660 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 178 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable181 [2020-10-05 23:15:00,661 INFO L427 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:00,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:00,661 INFO L82 PathProgramCache]: Analyzing trace with hash 1288074431, now seen corresponding path program 181 times [2020-10-05 23:15:00,661 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:00,662 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170711378] [2020-10-05 23:15:00,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:00,667 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:00,962 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:00,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170711378] [2020-10-05 23:15:00,962 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104771784] [2020-10-05 23:15:00,963 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:01,007 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:01,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:01,008 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:01,024 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:01,024 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:01,024 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:01,024 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589404894] [2020-10-05 23:15:01,024 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:01,025 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:01,025 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:01,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:01,025 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:01,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:01,742 INFO L93 Difference]: Finished difference Result 124 states and 295 transitions. [2020-10-05 23:15:01,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:15:01,744 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:01,744 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:01,744 INFO L225 Difference]: With dead ends: 124 [2020-10-05 23:15:01,744 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 23:15:01,745 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 389 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:15:01,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 23:15:01,747 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 87. [2020-10-05 23:15:01,747 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:01,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:01,747 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:01,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:01,747 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:01,747 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:01,748 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:01,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:01,748 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:01,748 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:01,948 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:01,949 INFO L427 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:01,949 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:01,949 INFO L82 PathProgramCache]: Analyzing trace with hash -1130643421, now seen corresponding path program 182 times [2020-10-05 23:15:01,950 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:01,950 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1531662871] [2020-10-05 23:15:01,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:02,265 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:02,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1531662871] [2020-10-05 23:15:02,265 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1160235695] [2020-10-05 23:15:02,265 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:02,312 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:02,312 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:02,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:02,313 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:02,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:02,354 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:02,354 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:02,355 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:02,355 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [909326574] [2020-10-05 23:15:02,355 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:02,355 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:02,355 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:02,356 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=418, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:02,356 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:03,238 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:03,238 INFO L93 Difference]: Finished difference Result 123 states and 293 transitions. [2020-10-05 23:15:03,239 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:15:03,239 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:03,239 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:03,240 INFO L225 Difference]: With dead ends: 123 [2020-10-05 23:15:03,240 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 23:15:03,240 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 466 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=590, Invalid=1666, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:15:03,241 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 23:15:03,242 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 86. [2020-10-05 23:15:03,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:03,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:03,242 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:03,242 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:03,242 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:03,242 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:03,242 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:03,243 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:03,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:03,243 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:03,443 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:03,444 INFO L427 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:03,444 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:03,444 INFO L82 PathProgramCache]: Analyzing trace with hash -442321631, now seen corresponding path program 183 times [2020-10-05 23:15:03,444 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:03,445 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2044159546] [2020-10-05 23:15:03,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:03,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:03,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:03,723 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2044159546] [2020-10-05 23:15:03,724 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926459436] [2020-10-05 23:15:03,724 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:03,773 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:15:03,773 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:03,774 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:03,775 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:03,808 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:03,809 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:03,809 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2052114017] [2020-10-05 23:15:03,809 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:03,809 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:03,810 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:03,810 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:03,810 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:04,603 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:04,603 INFO L93 Difference]: Finished difference Result 120 states and 287 transitions. [2020-10-05 23:15:04,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:15:04,604 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:04,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:04,605 INFO L225 Difference]: With dead ends: 120 [2020-10-05 23:15:04,605 INFO L226 Difference]: Without dead ends: 114 [2020-10-05 23:15:04,605 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:15:04,606 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-10-05 23:15:04,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 87. [2020-10-05 23:15:04,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:04,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:04,608 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:04,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:04,608 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:04,608 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:04,608 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:04,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:04,609 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:04,609 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:04,809 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:04,809 INFO L427 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:04,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:04,810 INFO L82 PathProgramCache]: Analyzing trace with hash 542869893, now seen corresponding path program 184 times [2020-10-05 23:15:04,810 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:04,811 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1437093410] [2020-10-05 23:15:04,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:04,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:05,097 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:05,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1437093410] [2020-10-05 23:15:05,097 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [109883927] [2020-10-05 23:15:05,097 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:05,144 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:05,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:05,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:05,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:05,170 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:05,184 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:05,185 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:05,185 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:05,185 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809751043] [2020-10-05 23:15:05,185 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:05,186 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:05,186 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:05,186 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=423, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:05,186 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:06,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:06,169 INFO L93 Difference]: Finished difference Result 119 states and 285 transitions. [2020-10-05 23:15:06,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:15:06,170 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:06,170 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:06,171 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:15:06,171 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:15:06,172 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=636, Invalid=1814, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:15:06,173 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:15:06,174 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 86. [2020-10-05 23:15:06,174 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:06,174 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:06,175 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:06,175 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:06,175 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:06,175 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:06,175 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:06,175 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:06,176 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:06,176 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:06,384 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:06,384 INFO L427 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:06,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:06,385 INFO L82 PathProgramCache]: Analyzing trace with hash -1074289149, now seen corresponding path program 185 times [2020-10-05 23:15:06,385 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:06,385 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76994565] [2020-10-05 23:15:06,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:06,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:06,654 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:06,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76994565] [2020-10-05 23:15:06,655 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1374176460] [2020-10-05 23:15:06,655 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:06,704 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:15:06,704 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:06,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:06,705 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:06,723 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:06,723 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:06,724 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:06,724 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1374042940] [2020-10-05 23:15:06,724 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:06,724 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:06,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:06,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:06,725 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:07,597 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:07,598 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-10-05 23:15:07,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:15:07,599 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:07,599 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:07,600 INFO L225 Difference]: With dead ends: 116 [2020-10-05 23:15:07,600 INFO L226 Difference]: Without dead ends: 110 [2020-10-05 23:15:07,600 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 519 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:15:07,600 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-10-05 23:15:07,602 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 87. [2020-10-05 23:15:07,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:07,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:07,602 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:07,602 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:07,602 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:07,603 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:07,603 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:07,603 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:07,603 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:07,603 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:07,803 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable186 [2020-10-05 23:15:07,804 INFO L427 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:07,804 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:07,804 INFO L82 PathProgramCache]: Analyzing trace with hash 182600551, now seen corresponding path program 186 times [2020-10-05 23:15:07,805 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:07,805 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [729718937] [2020-10-05 23:15:07,805 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:07,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:08,071 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:08,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [729718937] [2020-10-05 23:15:08,071 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1815142734] [2020-10-05 23:15:08,071 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:08,122 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:15:08,123 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:08,124 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:08,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:08,152 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:08,168 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:08,168 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:08,169 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:08,169 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1067123992] [2020-10-05 23:15:08,169 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:08,169 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:08,169 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:08,169 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=424, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:08,169 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:09,269 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:09,269 INFO L93 Difference]: Finished difference Result 115 states and 277 transitions. [2020-10-05 23:15:09,270 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:15:09,270 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:09,270 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:09,271 INFO L225 Difference]: With dead ends: 115 [2020-10-05 23:15:09,271 INFO L226 Difference]: Without dead ends: 109 [2020-10-05 23:15:09,272 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 598 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=698, Invalid=1954, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:15:09,272 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-10-05 23:15:09,274 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 86. [2020-10-05 23:15:09,274 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:09,274 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:09,274 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:09,275 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:09,275 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:09,275 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:09,275 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:09,275 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:09,275 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:09,275 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:09,484 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,184 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:09,485 INFO L427 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:09,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:09,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1798793061, now seen corresponding path program 187 times [2020-10-05 23:15:09,485 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:09,486 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [222769784] [2020-10-05 23:15:09,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:09,491 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:09,748 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:09,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [222769784] [2020-10-05 23:15:09,748 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [915229066] [2020-10-05 23:15:09,749 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:09,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:09,799 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:09,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:09,818 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:09,818 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:09,818 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:09,818 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887466586] [2020-10-05 23:15:09,819 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:09,819 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:09,819 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:09,819 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:09,819 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:10,749 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:10,749 INFO L93 Difference]: Finished difference Result 112 states and 271 transitions. [2020-10-05 23:15:10,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:15:10,750 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:10,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:10,750 INFO L225 Difference]: With dead ends: 112 [2020-10-05 23:15:10,750 INFO L226 Difference]: Without dead ends: 106 [2020-10-05 23:15:10,751 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 590 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:15:10,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-10-05 23:15:10,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 87. [2020-10-05 23:15:10,752 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:10,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:10,752 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:10,752 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:10,752 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:10,753 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:10,753 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:10,753 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:10,753 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:10,753 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:10,954 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable188 [2020-10-05 23:15:10,954 INFO L427 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:10,954 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:10,955 INFO L82 PathProgramCache]: Analyzing trace with hash -1976431159, now seen corresponding path program 188 times [2020-10-05 23:15:10,955 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:10,955 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1551885111] [2020-10-05 23:15:10,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:10,961 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:11,227 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:11,227 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1551885111] [2020-10-05 23:15:11,228 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1639023501] [2020-10-05 23:15:11,228 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:11,274 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:11,274 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:11,275 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:11,276 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:11,303 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:11,320 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:11,321 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:11,321 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:11,321 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1627818016] [2020-10-05 23:15:11,321 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:11,321 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:11,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:11,321 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=421, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:11,321 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:12,519 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:12,519 INFO L93 Difference]: Finished difference Result 111 states and 269 transitions. [2020-10-05 23:15:12,520 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:15:12,520 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:12,520 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:12,520 INFO L225 Difference]: With dead ends: 111 [2020-10-05 23:15:12,521 INFO L226 Difference]: Without dead ends: 105 [2020-10-05 23:15:12,521 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 670 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=776, Invalid=2086, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:15:12,521 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-05 23:15:12,523 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 86. [2020-10-05 23:15:12,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:12,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:12,523 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:12,523 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:12,524 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:12,524 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:12,524 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:12,524 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:12,524 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:12,524 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:12,725 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 186 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-05 23:15:12,725 INFO L427 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:12,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:12,726 INFO L82 PathProgramCache]: Analyzing trace with hash -321119929, now seen corresponding path program 189 times [2020-10-05 23:15:12,726 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:12,726 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [967305149] [2020-10-05 23:15:12,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:12,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:12,996 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:12,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [967305149] [2020-10-05 23:15:12,997 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2103252268] [2020-10-05 23:15:12,997 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:13,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:15:13,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:13,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:13,052 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:13,074 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:13,074 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:13,074 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:13,074 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [333776865] [2020-10-05 23:15:13,075 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:13,075 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:13,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:13,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:13,075 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:14,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:14,088 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-10-05 23:15:14,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:15:14,089 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:14,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:14,090 INFO L225 Difference]: With dead ends: 108 [2020-10-05 23:15:14,090 INFO L226 Difference]: Without dead ends: 102 [2020-10-05 23:15:14,090 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 665 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 23:15:14,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-05 23:15:14,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 87. [2020-10-05 23:15:14,092 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:14,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:14,093 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:14,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:14,093 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:14,093 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:14,093 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:14,093 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:14,093 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:14,093 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:14,297 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:14,297 INFO L427 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:14,298 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:14,298 INFO L82 PathProgramCache]: Analyzing trace with hash -2041247573, now seen corresponding path program 190 times [2020-10-05 23:15:14,298 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:14,299 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702931621] [2020-10-05 23:15:14,299 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:14,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:14,558 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:14,558 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702931621] [2020-10-05 23:15:14,559 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [162473941] [2020-10-05 23:15:14,559 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:14,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:14,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:14,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:14,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:14,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:14,652 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:14,652 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:14,652 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:14,653 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152461655] [2020-10-05 23:15:14,653 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:14,653 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:14,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:14,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:14,653 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:15,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:15,965 INFO L93 Difference]: Finished difference Result 107 states and 261 transitions. [2020-10-05 23:15:15,965 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:15:15,965 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:15,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:15,965 INFO L225 Difference]: With dead ends: 107 [2020-10-05 23:15:15,966 INFO L226 Difference]: Without dead ends: 101 [2020-10-05 23:15:15,966 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 746 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=870, Invalid=2210, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 23:15:15,967 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-10-05 23:15:15,970 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 86. [2020-10-05 23:15:15,970 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:15,971 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:15,971 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:15,971 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:15,971 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:15,971 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:15,971 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:15,971 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:15,971 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:15,972 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:16,172 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191,188 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:16,173 INFO L427 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:16,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:16,173 INFO L82 PathProgramCache]: Analyzing trace with hash -1570251863, now seen corresponding path program 191 times [2020-10-05 23:15:16,173 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:16,174 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [670082925] [2020-10-05 23:15:16,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:16,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:16,434 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:16,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [670082925] [2020-10-05 23:15:16,434 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601564741] [2020-10-05 23:15:16,434 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:16,485 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-10-05 23:15:16,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:16,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:16,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:16,511 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:16,511 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:16,512 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:16,512 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176635492] [2020-10-05 23:15:16,519 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:16,519 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:16,519 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:16,519 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:16,520 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:17,637 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:17,638 INFO L93 Difference]: Finished difference Result 104 states and 255 transitions. [2020-10-05 23:15:17,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 23:15:17,639 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:17,639 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:17,639 INFO L225 Difference]: With dead ends: 104 [2020-10-05 23:15:17,640 INFO L226 Difference]: Without dead ends: 98 [2020-10-05 23:15:17,640 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 744 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:15:17,641 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-05 23:15:17,642 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 87. [2020-10-05 23:15:17,642 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:17,642 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:17,642 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-10-05 23:15:17,643 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:17,643 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:17,643 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:17,643 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:17,643 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:17,643 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:17,643 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:17,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:17,844 INFO L427 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:17,844 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:17,845 INFO L82 PathProgramCache]: Analyzing trace with hash -1554164723, now seen corresponding path program 192 times [2020-10-05 23:15:17,845 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:17,845 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1811801899] [2020-10-05 23:15:17,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:17,851 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:18,102 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:18,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1811801899] [2020-10-05 23:15:18,103 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488657272] [2020-10-05 23:15:18,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:18,160 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-10-05 23:15:18,160 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:18,161 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:18,162 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:18,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:18,209 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:18,209 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:18,209 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:18,210 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695803349] [2020-10-05 23:15:18,210 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:18,210 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:18,210 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:18,211 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=103, Invalid=403, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:18,211 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 23 states. [2020-10-05 23:15:19,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:19,641 INFO L93 Difference]: Finished difference Result 103 states and 253 transitions. [2020-10-05 23:15:19,642 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 23:15:19,643 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:19,643 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:19,643 INFO L225 Difference]: With dead ends: 103 [2020-10-05 23:15:19,643 INFO L226 Difference]: Without dead ends: 97 [2020-10-05 23:15:19,644 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 826 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=980, Invalid=2326, Unknown=0, NotChecked=0, Total=3306 [2020-10-05 23:15:19,644 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-10-05 23:15:19,646 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 86. [2020-10-05 23:15:19,646 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:19,646 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:19,646 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 26 [2020-10-05 23:15:19,647 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:19,647 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:19,647 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:19,647 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:19,647 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:19,647 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:19,647 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:19,857 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable193 [2020-10-05 23:15:19,858 INFO L427 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:19,858 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:19,858 INFO L82 PathProgramCache]: Analyzing trace with hash -1553674613, now seen corresponding path program 193 times [2020-10-05 23:15:19,858 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:19,859 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1651922104] [2020-10-05 23:15:19,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:19,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:20,126 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:20,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1651922104] [2020-10-05 23:15:20,127 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1365584726] [2020-10-05 23:15:20,127 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:20,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:20,178 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:20,178 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:20,204 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:20,205 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:20,205 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-10-05 23:15:20,205 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [624744825] [2020-10-05 23:15:20,205 INFO L459 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-10-05 23:15:20,205 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:20,206 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-10-05 23:15:20,206 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-10-05 23:15:20,206 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 22 states. [2020-10-05 23:15:21,369 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:21,369 INFO L93 Difference]: Finished difference Result 119 states and 293 transitions. [2020-10-05 23:15:21,370 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:15:21,371 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-10-05 23:15:21,371 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:21,371 INFO L225 Difference]: With dead ends: 119 [2020-10-05 23:15:21,371 INFO L226 Difference]: Without dead ends: 113 [2020-10-05 23:15:21,372 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 827 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 23:15:21,372 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-05 23:15:21,374 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 90. [2020-10-05 23:15:21,374 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-10-05 23:15:21,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 233 transitions. [2020-10-05 23:15:21,374 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 233 transitions. Word has length 26 [2020-10-05 23:15:21,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:21,374 INFO L479 AbstractCegarLoop]: Abstraction has 90 states and 233 transitions. [2020-10-05 23:15:21,374 INFO L480 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-10-05 23:15:21,374 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 233 transitions. [2020-10-05 23:15:21,375 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:21,375 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:21,375 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:21,575 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:21,576 INFO L427 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:21,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:21,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1553657873, now seen corresponding path program 194 times [2020-10-05 23:15:21,577 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:21,577 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [391266735] [2020-10-05 23:15:21,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:21,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:21,846 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:21,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [391266735] [2020-10-05 23:15:21,847 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [91387476] [2020-10-05 23:15:21,847 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:21,895 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:21,895 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:21,896 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:21,896 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:21,922 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:21,942 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:21,943 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:21,943 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:21,943 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [256806593] [2020-10-05 23:15:21,943 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:21,944 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:21,944 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:21,944 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:21,944 INFO L87 Difference]: Start difference. First operand 90 states and 233 transitions. Second operand 23 states. [2020-10-05 23:15:23,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:23,432 INFO L93 Difference]: Finished difference Result 100 states and 249 transitions. [2020-10-05 23:15:23,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-05 23:15:23,433 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:23,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:23,433 INFO L225 Difference]: With dead ends: 100 [2020-10-05 23:15:23,433 INFO L226 Difference]: Without dead ends: 92 [2020-10-05 23:15:23,434 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 23:15:23,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-10-05 23:15:23,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 65. [2020-10-05 23:15:23,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-10-05 23:15:23,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-10-05 23:15:23,436 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-10-05 23:15:23,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:23,436 INFO L479 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-10-05 23:15:23,436 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:23,436 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-10-05 23:15:23,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-10-05 23:15:23,436 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:23,436 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:23,637 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:23,637 INFO L427 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:23,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:23,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1345493231, now seen corresponding path program 195 times [2020-10-05 23:15:23,638 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:23,638 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515474563] [2020-10-05 23:15:23,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:23,644 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:23,908 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:23,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515474563] [2020-10-05 23:15:23,908 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [955893098] [2020-10-05 23:15:23,908 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:23,959 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-10-05 23:15:23,960 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:23,961 INFO L263 TraceCheckSpWp]: Trace formula consists of 154 conjuncts, 22 conjunts are in the unsatisfiable core [2020-10-05 23:15:23,962 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:24,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:15:24,036 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:24,037 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:24,037 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-10-05 23:15:24,037 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1223838154] [2020-10-05 23:15:24,037 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:24,037 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:24,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:24,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:24,038 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand 23 states. [2020-10-05 23:15:25,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:25,551 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-10-05 23:15:25,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:15:25,552 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-10-05 23:15:25,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:25,552 INFO L225 Difference]: With dead ends: 116 [2020-10-05 23:15:25,552 INFO L226 Difference]: Without dead ends: 111 [2020-10-05 23:15:25,553 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 23:15:25,553 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-05 23:15:25,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-10-05 23:15:25,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 23:15:25,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-05 23:15:25,554 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-10-05 23:15:25,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:25,554 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-05 23:15:25,555 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:25,555 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-05 23:15:25,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:25,555 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:25,555 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:25,756 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196,193 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:25,756 INFO L427 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:25,757 INFO L82 PathProgramCache]: Analyzing trace with hash -918737500, now seen corresponding path program 196 times [2020-10-05 23:15:25,757 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:25,757 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410655472] [2020-10-05 23:15:25,757 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:26,058 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:26,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410655472] [2020-10-05 23:15:26,058 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [397166833] [2020-10-05 23:15:26,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:26,106 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:26,106 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:26,107 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:26,108 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:26,136 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-05 23:15:26,162 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:26,163 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:26,163 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:26,163 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [577939296] [2020-10-05 23:15:26,163 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:26,164 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:26,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:26,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:26,164 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 24 states. [2020-10-05 23:15:27,651 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:27,651 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-10-05 23:15:27,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:15:27,652 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:27,652 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:27,652 INFO L225 Difference]: With dead ends: 96 [2020-10-05 23:15:27,652 INFO L226 Difference]: Without dead ends: 91 [2020-10-05 23:15:27,653 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-10-05 23:15:27,653 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-10-05 23:15:27,654 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-10-05 23:15:27,654 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-05 23:15:27,654 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-10-05 23:15:27,654 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-10-05 23:15:27,654 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:27,654 INFO L479 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-10-05 23:15:27,655 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:27,655 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-10-05 23:15:27,655 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:27,655 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:27,655 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:27,855 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,194 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:27,856 INFO L427 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:27,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:27,856 INFO L82 PathProgramCache]: Analyzing trace with hash -473673969, now seen corresponding path program 197 times [2020-10-05 23:15:27,857 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:27,857 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [170084460] [2020-10-05 23:15:27,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:27,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:28,250 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:28,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [170084460] [2020-10-05 23:15:28,250 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1404973616] [2020-10-05 23:15:28,250 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:28,300 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:15:28,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:28,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:28,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:28,312 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:28,313 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:28,313 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:28,313 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178457842] [2020-10-05 23:15:28,313 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:28,313 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:28,313 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:28,314 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:28,314 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 23 states. [2020-10-05 23:15:28,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:28,908 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-10-05 23:15:28,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-05 23:15:28,909 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:28,910 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:28,910 INFO L225 Difference]: With dead ends: 102 [2020-10-05 23:15:28,910 INFO L226 Difference]: Without dead ends: 96 [2020-10-05 23:15:28,910 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-10-05 23:15:28,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-05 23:15:28,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-10-05 23:15:28,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:15:28,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-10-05 23:15:28,913 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-10-05 23:15:28,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:28,913 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-10-05 23:15:28,913 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:28,913 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-10-05 23:15:28,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:28,913 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:28,913 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:29,114 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable198 [2020-10-05 23:15:29,114 INFO L427 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:29,114 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:29,115 INFO L82 PathProgramCache]: Analyzing trace with hash 2099543923, now seen corresponding path program 198 times [2020-10-05 23:15:29,115 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:29,115 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783531671] [2020-10-05 23:15:29,115 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:29,121 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:29,500 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:29,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783531671] [2020-10-05 23:15:29,500 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1738624678] [2020-10-05 23:15:29,500 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:29,557 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:15:29,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:29,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:29,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:29,586 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:29,597 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:29,598 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:29,598 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:29,598 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1873726632] [2020-10-05 23:15:29,598 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:29,598 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:29,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:29,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:29,599 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 24 states. [2020-10-05 23:15:30,273 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:30,273 INFO L93 Difference]: Finished difference Result 122 states and 277 transitions. [2020-10-05 23:15:30,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-05 23:15:30,275 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:30,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:30,275 INFO L225 Difference]: With dead ends: 122 [2020-10-05 23:15:30,275 INFO L226 Difference]: Without dead ends: 116 [2020-10-05 23:15:30,276 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=562, Invalid=1330, Unknown=0, NotChecked=0, Total=1892 [2020-10-05 23:15:30,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-05 23:15:30,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2020-10-05 23:15:30,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-10-05 23:15:30,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 177 transitions. [2020-10-05 23:15:30,278 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 177 transitions. Word has length 27 [2020-10-05 23:15:30,278 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:30,278 INFO L479 AbstractCegarLoop]: Abstraction has 72 states and 177 transitions. [2020-10-05 23:15:30,278 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:30,278 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 177 transitions. [2020-10-05 23:15:30,279 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:30,279 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:30,279 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:30,479 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-05 23:15:30,480 INFO L427 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:30,480 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:30,480 INFO L82 PathProgramCache]: Analyzing trace with hash 915619313, now seen corresponding path program 199 times [2020-10-05 23:15:30,481 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:30,481 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595167054] [2020-10-05 23:15:30,481 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:30,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:30,849 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:30,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595167054] [2020-10-05 23:15:30,849 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1126709819] [2020-10-05 23:15:30,850 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:30,897 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:30,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:30,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:30,913 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:30,913 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:30,913 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:30,913 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500006033] [2020-10-05 23:15:30,914 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:30,914 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:30,914 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:30,914 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=117, Invalid=389, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:30,914 INFO L87 Difference]: Start difference. First operand 72 states and 177 transitions. Second operand 23 states. [2020-10-05 23:15:31,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:31,645 INFO L93 Difference]: Finished difference Result 123 states and 281 transitions. [2020-10-05 23:15:31,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-05 23:15:31,646 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:31,646 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:31,646 INFO L225 Difference]: With dead ends: 123 [2020-10-05 23:15:31,647 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 23:15:31,647 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 353 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=565, Invalid=1415, Unknown=0, NotChecked=0, Total=1980 [2020-10-05 23:15:31,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 23:15:31,648 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 75. [2020-10-05 23:15:31,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-10-05 23:15:31,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-10-05 23:15:31,649 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 27 [2020-10-05 23:15:31,649 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:31,649 INFO L479 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-10-05 23:15:31,650 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:31,650 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-10-05 23:15:31,650 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:31,650 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:31,650 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:31,851 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-05 23:15:31,851 INFO L427 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:31,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:31,852 INFO L82 PathProgramCache]: Analyzing trace with hash -632539307, now seen corresponding path program 200 times [2020-10-05 23:15:31,852 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:31,852 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198671801] [2020-10-05 23:15:31,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:31,858 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:32,232 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:32,232 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198671801] [2020-10-05 23:15:32,233 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1050693574] [2020-10-05 23:15:32,233 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:32,278 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:32,279 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:32,280 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:32,280 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:32,309 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:32,324 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:32,324 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:32,325 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:32,325 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1176871913] [2020-10-05 23:15:32,325 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:32,325 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:32,325 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:32,325 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:32,325 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 24 states. [2020-10-05 23:15:33,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:33,104 INFO L93 Difference]: Finished difference Result 139 states and 313 transitions. [2020-10-05 23:15:33,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-05 23:15:33,105 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:33,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:33,106 INFO L225 Difference]: With dead ends: 139 [2020-10-05 23:15:33,106 INFO L226 Difference]: Without dead ends: 133 [2020-10-05 23:15:33,106 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=601, Invalid=1561, Unknown=0, NotChecked=0, Total=2162 [2020-10-05 23:15:33,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-05 23:15:33,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 74. [2020-10-05 23:15:33,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-05 23:15:33,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 183 transitions. [2020-10-05 23:15:33,109 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 183 transitions. Word has length 27 [2020-10-05 23:15:33,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:33,109 INFO L479 AbstractCegarLoop]: Abstraction has 74 states and 183 transitions. [2020-10-05 23:15:33,109 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:33,109 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 183 transitions. [2020-10-05 23:15:33,110 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:33,110 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:33,110 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:33,317 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-05 23:15:33,318 INFO L427 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:33,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:33,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1934328493, now seen corresponding path program 201 times [2020-10-05 23:15:33,318 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:33,319 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [535781241] [2020-10-05 23:15:33,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:33,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:33,676 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:33,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [535781241] [2020-10-05 23:15:33,677 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1162560938] [2020-10-05 23:15:33,677 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:33,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:15:33,730 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:33,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:33,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:33,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:33,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:33,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:33,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [109534724] [2020-10-05 23:15:33,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:33,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:33,748 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:33,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:33,748 INFO L87 Difference]: Start difference. First operand 74 states and 183 transitions. Second operand 23 states. [2020-10-05 23:15:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:34,585 INFO L93 Difference]: Finished difference Result 139 states and 315 transitions. [2020-10-05 23:15:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-05 23:15:34,586 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:34,586 INFO L225 Difference]: With dead ends: 139 [2020-10-05 23:15:34,587 INFO L226 Difference]: Without dead ends: 133 [2020-10-05 23:15:34,587 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 472 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=618, Invalid=1638, Unknown=0, NotChecked=0, Total=2256 [2020-10-05 23:15:34,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-10-05 23:15:34,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 77. [2020-10-05 23:15:34,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-05 23:15:34,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-10-05 23:15:34,590 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 27 [2020-10-05 23:15:34,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:34,590 INFO L479 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-10-05 23:15:34,590 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:34,590 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-10-05 23:15:34,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:34,590 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:34,591 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:34,792 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:34,793 INFO L427 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:34,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:34,793 INFO L82 PathProgramCache]: Analyzing trace with hash 1550090167, now seen corresponding path program 202 times [2020-10-05 23:15:34,793 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:34,794 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386618625] [2020-10-05 23:15:34,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:34,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:35,149 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:35,149 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386618625] [2020-10-05 23:15:35,150 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1659093937] [2020-10-05 23:15:35,150 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/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 [2020-10-05 23:15:35,198 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:35,198 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:35,199 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:35,199 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:35,227 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:35,243 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:35,244 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:35,244 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:35,244 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591713128] [2020-10-05 23:15:35,244 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:35,244 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:35,244 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:35,245 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:35,245 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 24 states. [2020-10-05 23:15:36,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:36,184 INFO L93 Difference]: Finished difference Result 136 states and 309 transitions. [2020-10-05 23:15:36,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-05 23:15:36,185 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:36,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:36,186 INFO L225 Difference]: With dead ends: 136 [2020-10-05 23:15:36,186 INFO L226 Difference]: Without dead ends: 130 [2020-10-05 23:15:36,186 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=622, Invalid=1730, Unknown=0, NotChecked=0, Total=2352 [2020-10-05 23:15:36,186 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-05 23:15:36,187 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 76. [2020-10-05 23:15:36,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-05 23:15:36,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 189 transitions. [2020-10-05 23:15:36,188 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 189 transitions. Word has length 27 [2020-10-05 23:15:36,188 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:36,188 INFO L479 AbstractCegarLoop]: Abstraction has 76 states and 189 transitions. [2020-10-05 23:15:36,189 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:36,189 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 189 transitions. [2020-10-05 23:15:36,189 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:36,189 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:36,189 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:36,389 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-05 23:15:36,390 INFO L427 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:36,390 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:36,390 INFO L82 PathProgramCache]: Analyzing trace with hash 1602366773, now seen corresponding path program 203 times [2020-10-05 23:15:36,391 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:36,391 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [763622634] [2020-10-05 23:15:36,391 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:36,397 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:36,735 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:36,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [763622634] [2020-10-05 23:15:36,735 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113189781] [2020-10-05 23:15:36,735 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:36,785 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:15:36,786 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:36,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:36,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:36,802 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:36,803 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:36,803 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:36,803 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [755148516] [2020-10-05 23:15:36,803 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:36,803 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:36,803 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:36,803 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:36,804 INFO L87 Difference]: Start difference. First operand 76 states and 189 transitions. Second operand 23 states. [2020-10-05 23:15:37,711 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:37,711 INFO L93 Difference]: Finished difference Result 137 states and 313 transitions. [2020-10-05 23:15:37,712 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-05 23:15:37,712 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:37,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:37,713 INFO L225 Difference]: With dead ends: 137 [2020-10-05 23:15:37,713 INFO L226 Difference]: Without dead ends: 131 [2020-10-05 23:15:37,714 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 541 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=654, Invalid=1796, Unknown=0, NotChecked=0, Total=2450 [2020-10-05 23:15:37,714 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-05 23:15:37,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 79. [2020-10-05 23:15:37,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-05 23:15:37,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-10-05 23:15:37,716 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 27 [2020-10-05 23:15:37,716 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:37,716 INFO L479 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-10-05 23:15:37,716 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:37,716 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-10-05 23:15:37,716 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:37,716 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:37,717 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:37,917 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable204,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:37,917 INFO L427 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:37,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:37,918 INFO L82 PathProgramCache]: Analyzing trace with hash -816351079, now seen corresponding path program 204 times [2020-10-05 23:15:37,918 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:37,918 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90053348] [2020-10-05 23:15:37,919 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:37,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:38,263 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:38,263 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90053348] [2020-10-05 23:15:38,264 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655832343] [2020-10-05 23:15:38,264 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:38,343 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:15:38,343 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:38,344 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:38,345 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:38,369 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:38,384 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:38,384 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:38,384 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:38,385 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [531574611] [2020-10-05 23:15:38,385 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:38,385 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:38,385 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:38,385 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:38,385 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 24 states. [2020-10-05 23:15:39,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:39,427 INFO L93 Difference]: Finished difference Result 134 states and 307 transitions. [2020-10-05 23:15:39,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-05 23:15:39,428 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:39,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:39,428 INFO L225 Difference]: With dead ends: 134 [2020-10-05 23:15:39,429 INFO L226 Difference]: Without dead ends: 128 [2020-10-05 23:15:39,429 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=659, Invalid=1891, Unknown=0, NotChecked=0, Total=2550 [2020-10-05 23:15:39,429 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-05 23:15:39,430 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 78. [2020-10-05 23:15:39,430 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-10-05 23:15:39,430 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 195 transitions. [2020-10-05 23:15:39,430 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 195 transitions. Word has length 27 [2020-10-05 23:15:39,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:39,431 INFO L479 AbstractCegarLoop]: Abstraction has 78 states and 195 transitions. [2020-10-05 23:15:39,431 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:39,431 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 195 transitions. [2020-10-05 23:15:39,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:39,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:39,431 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:39,631 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 202 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable205 [2020-10-05 23:15:39,632 INFO L427 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:39,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:39,632 INFO L82 PathProgramCache]: Analyzing trace with hash -128029289, now seen corresponding path program 205 times [2020-10-05 23:15:39,633 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:39,633 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631090249] [2020-10-05 23:15:39,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:39,639 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:39,977 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:39,977 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631090249] [2020-10-05 23:15:39,978 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850114634] [2020-10-05 23:15:39,978 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:40,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:40,033 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:40,033 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:40,059 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:40,059 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:40,059 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:40,059 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251530576] [2020-10-05 23:15:40,059 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:40,060 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:40,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:40,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:40,060 INFO L87 Difference]: Start difference. First operand 78 states and 195 transitions. Second operand 23 states. [2020-10-05 23:15:41,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:41,057 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-10-05 23:15:41,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-10-05 23:15:41,058 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:41,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:41,059 INFO L225 Difference]: With dead ends: 135 [2020-10-05 23:15:41,059 INFO L226 Difference]: Without dead ends: 129 [2020-10-05 23:15:41,059 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 620 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=706, Invalid=1946, Unknown=0, NotChecked=0, Total=2652 [2020-10-05 23:15:41,060 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-05 23:15:41,061 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 81. [2020-10-05 23:15:41,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-10-05 23:15:41,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-10-05 23:15:41,062 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 27 [2020-10-05 23:15:41,062 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:41,062 INFO L479 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-10-05 23:15:41,062 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:41,062 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-10-05 23:15:41,062 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:41,062 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:41,063 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:41,263 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable206,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:41,263 INFO L427 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:41,264 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:41,264 INFO L82 PathProgramCache]: Analyzing trace with hash 857162235, now seen corresponding path program 206 times [2020-10-05 23:15:41,264 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:41,265 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [460913554] [2020-10-05 23:15:41,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:41,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:41,611 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:41,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [460913554] [2020-10-05 23:15:41,612 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606796432] [2020-10-05 23:15:41,612 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:41,665 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:41,665 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:41,666 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:41,667 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:41,695 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:41,713 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:41,714 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:41,714 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:41,714 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [589584138] [2020-10-05 23:15:41,714 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:41,714 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:41,714 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:41,714 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:41,714 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 24 states. [2020-10-05 23:15:42,838 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:42,839 INFO L93 Difference]: Finished difference Result 132 states and 305 transitions. [2020-10-05 23:15:42,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-05 23:15:42,840 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:42,840 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:42,840 INFO L225 Difference]: With dead ends: 132 [2020-10-05 23:15:42,840 INFO L226 Difference]: Without dead ends: 126 [2020-10-05 23:15:42,840 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 633 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=712, Invalid=2044, Unknown=0, NotChecked=0, Total=2756 [2020-10-05 23:15:42,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-05 23:15:42,842 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 80. [2020-10-05 23:15:42,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-05 23:15:42,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 201 transitions. [2020-10-05 23:15:42,842 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 201 transitions. Word has length 27 [2020-10-05 23:15:42,842 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:42,843 INFO L479 AbstractCegarLoop]: Abstraction has 80 states and 201 transitions. [2020-10-05 23:15:42,843 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:42,843 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 201 transitions. [2020-10-05 23:15:42,843 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:42,843 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:42,843 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:43,043 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,204 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:43,044 INFO L427 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:43,044 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:43,044 INFO L82 PathProgramCache]: Analyzing trace with hash -759996807, now seen corresponding path program 207 times [2020-10-05 23:15:43,045 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:43,045 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1215348924] [2020-10-05 23:15:43,045 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:43,051 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:43,379 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:43,379 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1215348924] [2020-10-05 23:15:43,380 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [869660670] [2020-10-05 23:15:43,380 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:43,436 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:15:43,436 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:43,437 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:43,438 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:43,459 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:43,459 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:43,459 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:43,459 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703009157] [2020-10-05 23:15:43,459 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:43,459 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:43,460 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:43,460 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:43,460 INFO L87 Difference]: Start difference. First operand 80 states and 201 transitions. Second operand 23 states. [2020-10-05 23:15:44,502 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:44,503 INFO L93 Difference]: Finished difference Result 133 states and 309 transitions. [2020-10-05 23:15:44,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-10-05 23:15:44,503 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:44,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:44,504 INFO L225 Difference]: With dead ends: 133 [2020-10-05 23:15:44,504 INFO L226 Difference]: Without dead ends: 127 [2020-10-05 23:15:44,504 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 704 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=774, Invalid=2088, Unknown=0, NotChecked=0, Total=2862 [2020-10-05 23:15:44,505 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 127 states. [2020-10-05 23:15:44,506 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 127 to 83. [2020-10-05 23:15:44,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-05 23:15:44,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-10-05 23:15:44,507 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 27 [2020-10-05 23:15:44,507 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:44,507 INFO L479 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-10-05 23:15:44,507 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:44,507 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-10-05 23:15:44,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:44,507 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:44,507 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:44,708 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:44,708 INFO L427 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:44,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:44,709 INFO L82 PathProgramCache]: Analyzing trace with hash 496892893, now seen corresponding path program 208 times [2020-10-05 23:15:44,709 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:44,709 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124919919] [2020-10-05 23:15:44,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:44,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:45,040 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:45,040 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124919919] [2020-10-05 23:15:45,041 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303662505] [2020-10-05 23:15:45,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:45,087 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:45,087 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:45,088 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:45,089 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:45,126 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:45,144 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:45,144 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:45,145 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:45,145 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [896223721] [2020-10-05 23:15:45,145 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:45,145 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:45,145 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:45,145 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=463, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:45,145 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 24 states. [2020-10-05 23:15:46,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:46,375 INFO L93 Difference]: Finished difference Result 130 states and 303 transitions. [2020-10-05 23:15:46,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-05 23:15:46,376 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:46,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:46,376 INFO L225 Difference]: With dead ends: 130 [2020-10-05 23:15:46,376 INFO L226 Difference]: Without dead ends: 124 [2020-10-05 23:15:46,377 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 714 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=781, Invalid=2189, Unknown=0, NotChecked=0, Total=2970 [2020-10-05 23:15:46,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-10-05 23:15:46,378 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 82. [2020-10-05 23:15:46,378 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-05 23:15:46,378 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 207 transitions. [2020-10-05 23:15:46,379 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 207 transitions. Word has length 27 [2020-10-05 23:15:46,379 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:46,379 INFO L479 AbstractCegarLoop]: Abstraction has 82 states and 207 transitions. [2020-10-05 23:15:46,379 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:46,379 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 207 transitions. [2020-10-05 23:15:46,379 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:46,379 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:46,380 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:46,580 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,206 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:46,580 INFO L427 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:46,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:46,581 INFO L82 PathProgramCache]: Analyzing trace with hash 2113085403, now seen corresponding path program 209 times [2020-10-05 23:15:46,581 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:46,582 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1912577280] [2020-10-05 23:15:46,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:46,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:46,915 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:46,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1912577280] [2020-10-05 23:15:46,915 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1461635731] [2020-10-05 23:15:46,915 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:46,967 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:15:46,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:46,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:46,969 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:46,994 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:46,994 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:46,994 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:46,995 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [810374788] [2020-10-05 23:15:46,995 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:46,995 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:46,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:46,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:46,996 INFO L87 Difference]: Start difference. First operand 82 states and 207 transitions. Second operand 23 states. [2020-10-05 23:15:48,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:48,113 INFO L93 Difference]: Finished difference Result 131 states and 307 transitions. [2020-10-05 23:15:48,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-10-05 23:15:48,114 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:48,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:48,114 INFO L225 Difference]: With dead ends: 131 [2020-10-05 23:15:48,114 INFO L226 Difference]: Without dead ends: 125 [2020-10-05 23:15:48,115 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 792 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=858, Invalid=2222, Unknown=0, NotChecked=0, Total=3080 [2020-10-05 23:15:48,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-05 23:15:48,117 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 85. [2020-10-05 23:15:48,117 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-10-05 23:15:48,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-10-05 23:15:48,117 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 27 [2020-10-05 23:15:48,118 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:48,118 INFO L479 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-10-05 23:15:48,118 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:48,118 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-10-05 23:15:48,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:48,118 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:48,118 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:48,321 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-05 23:15:48,322 INFO L427 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:48,322 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:48,322 INFO L82 PathProgramCache]: Analyzing trace with hash -1662138817, now seen corresponding path program 210 times [2020-10-05 23:15:48,322 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:48,323 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [155641743] [2020-10-05 23:15:48,323 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:48,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:48,669 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:48,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [155641743] [2020-10-05 23:15:48,670 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1225131599] [2020-10-05 23:15:48,670 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:48,721 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:15:48,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:48,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:48,723 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:48,757 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:48,778 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:48,778 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:48,778 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:48,778 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025629674] [2020-10-05 23:15:48,779 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:48,779 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:48,779 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:48,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=93, Invalid=459, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:48,779 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 24 states. [2020-10-05 23:15:50,132 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:50,133 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-10-05 23:15:50,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-10-05 23:15:50,134 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:50,134 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:50,134 INFO L225 Difference]: With dead ends: 128 [2020-10-05 23:15:50,134 INFO L226 Difference]: Without dead ends: 122 [2020-10-05 23:15:50,135 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 799 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=866, Invalid=2326, Unknown=0, NotChecked=0, Total=3192 [2020-10-05 23:15:50,135 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-10-05 23:15:50,136 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 84. [2020-10-05 23:15:50,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-10-05 23:15:50,137 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 213 transitions. [2020-10-05 23:15:50,137 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 213 transitions. Word has length 27 [2020-10-05 23:15:50,137 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:50,137 INFO L479 AbstractCegarLoop]: Abstraction has 84 states and 213 transitions. [2020-10-05 23:15:50,137 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:50,138 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 213 transitions. [2020-10-05 23:15:50,138 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:50,138 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:50,138 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:50,345 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 208 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable211 [2020-10-05 23:15:50,346 INFO L427 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:50,346 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:50,346 INFO L82 PathProgramCache]: Analyzing trace with hash -6827587, now seen corresponding path program 211 times [2020-10-05 23:15:50,346 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:50,347 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [144031293] [2020-10-05 23:15:50,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:50,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:50,671 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:50,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [144031293] [2020-10-05 23:15:50,672 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562661985] [2020-10-05 23:15:50,672 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:50,719 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:50,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:50,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:50,746 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:50,747 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:50,747 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:50,747 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248297854] [2020-10-05 23:15:50,747 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:50,747 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:50,747 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:50,748 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:50,748 INFO L87 Difference]: Start difference. First operand 84 states and 213 transitions. Second operand 23 states. [2020-10-05 23:15:51,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:51,946 INFO L93 Difference]: Finished difference Result 129 states and 305 transitions. [2020-10-05 23:15:51,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-10-05 23:15:51,947 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:51,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:51,947 INFO L225 Difference]: With dead ends: 129 [2020-10-05 23:15:51,947 INFO L226 Difference]: Without dead ends: 123 [2020-10-05 23:15:51,948 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 56 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 884 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2348, Unknown=0, NotChecked=0, Total=3306 [2020-10-05 23:15:51,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-10-05 23:15:51,949 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 87. [2020-10-05 23:15:51,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 87 states. [2020-10-05 23:15:51,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-10-05 23:15:51,950 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 27 [2020-10-05 23:15:51,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:51,950 INFO L479 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-10-05 23:15:51,950 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:51,950 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-10-05 23:15:51,950 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:51,950 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:51,950 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:52,151 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-05 23:15:52,151 INFO L427 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:52,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:52,152 INFO L82 PathProgramCache]: Analyzing trace with hash -1726955231, now seen corresponding path program 212 times [2020-10-05 23:15:52,152 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:52,152 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937360062] [2020-10-05 23:15:52,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:52,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:52,474 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:52,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937360062] [2020-10-05 23:15:52,475 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123345639] [2020-10-05 23:15:52,475 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:52,528 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-05 23:15:52,528 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:52,530 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:52,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:52,561 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:52,583 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:52,583 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:52,583 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:52,584 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026627414] [2020-10-05 23:15:52,584 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:52,584 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:52,584 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:52,584 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=451, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:52,584 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand 24 states. [2020-10-05 23:15:54,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:54,084 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-10-05 23:15:54,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-10-05 23:15:54,085 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:54,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:54,086 INFO L225 Difference]: With dead ends: 126 [2020-10-05 23:15:54,086 INFO L226 Difference]: Without dead ends: 120 [2020-10-05 23:15:54,086 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=967, Invalid=2455, Unknown=0, NotChecked=0, Total=3422 [2020-10-05 23:15:54,087 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-05 23:15:54,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 86. [2020-10-05 23:15:54,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 86 states. [2020-10-05 23:15:54,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 219 transitions. [2020-10-05 23:15:54,089 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 219 transitions. Word has length 27 [2020-10-05 23:15:54,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:54,089 INFO L479 AbstractCegarLoop]: Abstraction has 86 states and 219 transitions. [2020-10-05 23:15:54,089 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:54,089 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 219 transitions. [2020-10-05 23:15:54,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:54,090 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:54,090 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:54,290 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-05 23:15:54,291 INFO L427 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:54,291 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:54,291 INFO L82 PathProgramCache]: Analyzing trace with hash -1255959521, now seen corresponding path program 213 times [2020-10-05 23:15:54,292 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:54,292 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [888449472] [2020-10-05 23:15:54,292 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:54,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:54,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [888449472] [2020-10-05 23:15:54,609 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1303086909] [2020-10-05 23:15:54,609 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:54,663 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-10-05 23:15:54,663 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:54,665 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:54,665 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:54,697 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:54,697 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:54,697 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:54,698 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [524872515] [2020-10-05 23:15:54,698 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:54,698 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:54,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:54,698 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:54,698 INFO L87 Difference]: Start difference. First operand 86 states and 219 transitions. Second operand 23 states. [2020-10-05 23:15:56,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:56,010 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-10-05 23:15:56,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 42 states. [2020-10-05 23:15:56,011 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:15:56,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:56,012 INFO L225 Difference]: With dead ends: 127 [2020-10-05 23:15:56,012 INFO L226 Difference]: Without dead ends: 121 [2020-10-05 23:15:56,012 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 980 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1074, Invalid=2466, Unknown=0, NotChecked=0, Total=3540 [2020-10-05 23:15:56,012 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-05 23:15:56,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 89. [2020-10-05 23:15:56,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-10-05 23:15:56,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 227 transitions. [2020-10-05 23:15:56,014 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 227 transitions. Word has length 27 [2020-10-05 23:15:56,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:56,014 INFO L479 AbstractCegarLoop]: Abstraction has 89 states and 227 transitions. [2020-10-05 23:15:56,014 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:15:56,014 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 227 transitions. [2020-10-05 23:15:56,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:56,015 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:56,015 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:56,215 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:56,216 INFO L427 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:56,216 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:56,216 INFO L82 PathProgramCache]: Analyzing trace with hash -1239872381, now seen corresponding path program 214 times [2020-10-05 23:15:56,216 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:56,217 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1510821358] [2020-10-05 23:15:56,217 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:56,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:56,539 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:56,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1510821358] [2020-10-05 23:15:56,540 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673631623] [2020-10-05 23:15:56,540 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:56,589 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-05 23:15:56,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:56,590 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:56,591 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:56,622 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:15:56,645 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:56,646 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:56,646 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:15:56,646 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [597639636] [2020-10-05 23:15:56,646 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:15:56,646 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:56,647 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:15:56,647 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=113, Invalid=439, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:15:56,647 INFO L87 Difference]: Start difference. First operand 89 states and 227 transitions. Second operand 24 states. [2020-10-05 23:15:58,251 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:15:58,251 INFO L93 Difference]: Finished difference Result 124 states and 297 transitions. [2020-10-05 23:15:58,253 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-10-05 23:15:58,253 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:15:58,253 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:15:58,253 INFO L225 Difference]: With dead ends: 124 [2020-10-05 23:15:58,254 INFO L226 Difference]: Without dead ends: 118 [2020-10-05 23:15:58,254 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 981 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=1084, Invalid=2576, Unknown=0, NotChecked=0, Total=3660 [2020-10-05 23:15:58,255 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-05 23:15:58,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 88. [2020-10-05 23:15:58,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-05 23:15:58,257 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-10-05 23:15:58,257 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 27 [2020-10-05 23:15:58,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:15:58,257 INFO L479 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-10-05 23:15:58,257 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:15:58,258 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-10-05 23:15:58,258 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:15:58,258 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:15:58,258 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:15:58,466 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 212 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-05 23:15:58,467 INFO L427 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:15:58,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:15:58,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1239382271, now seen corresponding path program 215 times [2020-10-05 23:15:58,467 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:15:58,468 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1223809705] [2020-10-05 23:15:58,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:15:58,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:15:58,788 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:58,788 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1223809705] [2020-10-05 23:15:58,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [697010278] [2020-10-05 23:15:58,789 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:15:58,846 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-10-05 23:15:58,846 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:15:58,847 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:15:58,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:15:58,876 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:15:58,876 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:15:58,876 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-10-05 23:15:58,876 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032631521] [2020-10-05 23:15:58,877 INFO L459 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-10-05 23:15:58,877 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:15:58,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-10-05 23:15:58,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-10-05 23:15:58,877 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand 23 states. [2020-10-05 23:16:00,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:00,245 INFO L93 Difference]: Finished difference Result 144 states and 347 transitions. [2020-10-05 23:16:00,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-10-05 23:16:00,246 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-10-05 23:16:00,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:00,247 INFO L225 Difference]: With dead ends: 144 [2020-10-05 23:16:00,247 INFO L226 Difference]: Without dead ends: 138 [2020-10-05 23:16:00,247 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1080 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1206, Invalid=2576, Unknown=0, NotChecked=0, Total=3782 [2020-10-05 23:16:00,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-05 23:16:00,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 94. [2020-10-05 23:16:00,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-05 23:16:00,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 245 transitions. [2020-10-05 23:16:00,250 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 245 transitions. Word has length 27 [2020-10-05 23:16:00,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:00,250 INFO L479 AbstractCegarLoop]: Abstraction has 94 states and 245 transitions. [2020-10-05 23:16:00,250 INFO L480 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-10-05 23:16:00,250 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 245 transitions. [2020-10-05 23:16:00,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-10-05 23:16:00,251 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:00,251 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:00,451 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable216,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:00,452 INFO L427 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:00,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:00,452 INFO L82 PathProgramCache]: Analyzing trace with hash -1239365531, now seen corresponding path program 216 times [2020-10-05 23:16:00,453 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:00,453 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018648388] [2020-10-05 23:16:00,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:00,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-05 23:16:00,788 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:00,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018648388] [2020-10-05 23:16:00,789 INFO L354 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [741050417] [2020-10-05 23:16:00,789 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-05 23:16:00,842 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-10-05 23:16:00,842 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-05 23:16:00,843 INFO L263 TraceCheckSpWp]: Trace formula consists of 159 conjuncts, 23 conjunts are in the unsatisfiable core [2020-10-05 23:16:00,844 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-05 23:16:00,875 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-05 23:16:00,899 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-05 23:16:00,899 INFO L220 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-05 23:16:00,900 INFO L233 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-10-05 23:16:00,900 INFO L156 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500921996] [2020-10-05 23:16:00,900 INFO L459 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-10-05 23:16:00,900 INFO L143 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-05 23:16:00,900 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-10-05 23:16:00,901 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-10-05 23:16:00,901 INFO L87 Difference]: Start difference. First operand 94 states and 245 transitions. Second operand 24 states. [2020-10-05 23:16:02,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-05 23:16:02,573 INFO L93 Difference]: Finished difference Result 125 states and 303 transitions. [2020-10-05 23:16:02,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-10-05 23:16:02,574 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-10-05 23:16:02,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-05 23:16:02,575 INFO L225 Difference]: With dead ends: 125 [2020-10-05 23:16:02,575 INFO L226 Difference]: Without dead ends: 117 [2020-10-05 23:16:02,576 INFO L675 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1079 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=1217, Invalid=2689, Unknown=0, NotChecked=0, Total=3906 [2020-10-05 23:16:02,576 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-05 23:16:02,577 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 91. [2020-10-05 23:16:02,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-05 23:16:02,578 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-10-05 23:16:02,578 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-10-05 23:16:02,578 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-05 23:16:02,578 INFO L479 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-10-05 23:16:02,578 INFO L480 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-10-05 23:16:02,578 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-10-05 23:16:02,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-10-05 23:16:02,579 INFO L414 BasicCegarLoop]: Found error trace [2020-10-05 23:16:02,579 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-05 23:16:02,779 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 214 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable217 [2020-10-05 23:16:02,780 INFO L427 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-05 23:16:02,780 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-05 23:16:02,780 INFO L82 PathProgramCache]: Analyzing trace with hash -1945349894, now seen corresponding path program 217 times [2020-10-05 23:16:02,781 INFO L163 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-05 23:16:02,781 INFO L354 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [177873470] [2020-10-05 23:16:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-05 23:16:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:16:02,789 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:16:02,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-10-05 23:16:02,801 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-10-05 23:16:02,843 INFO L174 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-10-05 23:16:02,843 INFO L520 BasicCegarLoop]: Counterexample might be feasible [2020-10-05 23:16:02,843 WARN L516 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218 [2020-10-05 23:16:02,923 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 11:16:02 BasicIcfg [2020-10-05 23:16:02,923 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-05 23:16:02,925 INFO L168 Benchmark]: Toolchain (without parser) took 233477.87 ms. Allocated memory was 140.0 MB in the beginning and 221.8 MB in the end (delta: 81.8 MB). Free memory was 101.4 MB in the beginning and 156.7 MB in the end (delta: -55.3 MB). Peak memory consumption was 26.5 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:02,926 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. [2020-10-05 23:16:02,926 INFO L168 Benchmark]: CACSL2BoogieTranslator took 720.39 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 160.3 MB in the end (delta: -59.2 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:02,927 INFO L168 Benchmark]: Boogie Procedure Inliner took 45.51 ms. Allocated memory is still 202.9 MB. Free memory was 160.3 MB in the beginning and 158.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:02,927 INFO L168 Benchmark]: Boogie Preprocessor took 28.10 ms. Allocated memory is still 202.9 MB. Free memory was 158.3 MB in the beginning and 157.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:02,928 INFO L168 Benchmark]: RCFGBuilder took 397.12 ms. Allocated memory is still 202.9 MB. Free memory was 157.0 MB in the beginning and 136.6 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. [2020-10-05 23:16:02,928 INFO L168 Benchmark]: TraceAbstraction took 232281.29 ms. Allocated memory was 202.9 MB in the beginning and 221.8 MB in the end (delta: 18.9 MB). Free memory was 135.9 MB in the beginning and 156.7 MB in the end (delta: -20.8 MB). There was no memory consumed. Max. memory is 7.1 GB. [2020-10-05 23:16:02,930 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.22 ms. Allocated memory is still 140.0 MB. Free memory was 121.5 MB in the beginning and 121.3 MB in the end (delta: 210.0 kB). Peak memory consumption was 210.0 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 720.39 ms. Allocated memory was 140.0 MB in the beginning and 202.9 MB in the end (delta: 62.9 MB). Free memory was 101.2 MB in the beginning and 160.3 MB in the end (delta: -59.2 MB). Peak memory consumption was 23.5 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 45.51 ms. Allocated memory is still 202.9 MB. Free memory was 160.3 MB in the beginning and 158.3 MB in the end (delta: 2.0 MB). Peak memory consumption was 2.0 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 28.10 ms. Allocated memory is still 202.9 MB. Free memory was 158.3 MB in the beginning and 157.0 MB in the end (delta: 1.3 MB). Peak memory consumption was 1.3 MB. Max. memory is 7.1 GB. * RCFGBuilder took 397.12 ms. Allocated memory is still 202.9 MB. Free memory was 157.0 MB in the beginning and 136.6 MB in the end (delta: 20.4 MB). Peak memory consumption was 20.4 MB. Max. memory is 7.1 GB. * TraceAbstraction took 232281.29 ms. Allocated memory was 202.9 MB in the beginning and 221.8 MB in the end (delta: 18.9 MB). Free memory was 135.9 MB in the beginning and 156.7 MB in the end (delta: -20.8 MB). There was no memory consumed. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks LbeTime: 1.3s, 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, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 0 MoverChecksTotal, 851 CheckedPairsTotal, 42 TotalNumberOfCompositions - CounterExampleResult [Line: 703]: a call of __VERIFIER_error() is reachable a call of __VERIFIER_error() is reachable We found a FailurePath: [L675] 0 int i = 3, j = 6; [L693] 0 pthread_t id1, id2; [L694] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L677] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L695] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1] [L685] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L697] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=1, k=0] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=2, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L677] COND TRUE 1 k < 10 [L679] 1 i = j + 1 [L677] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=10, k=9] [L685] COND TRUE 2 k < 10 [L687] 2 j = i + 1 [L685] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L700] 0 int condJ = j >= (2*10 +6); [L702] COND TRUE 0 condI || condJ [L703] 0 __VERIFIER_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 51 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 232.0s, OverallIterations: 219, TraceHistogramMax: 10, AutomataDifference: 129.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.3s, HoareTripleCheckerStatistics: 3496 SDtfs, 12096 SDslu, 22388 SDs, 0 SdLazy, 24086 SolverSat, 13803 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 23.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 11876 GetRequests, 3914 SyntacticMatches, 213 SemanticMatches, 7749 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75944 ImplicationChecksByTransitivity, 132.8s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=217, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.6s AutomataMinimizationTime, 218 MinimizatonAttempts, 5505 StatesRemovedByMinimization, 217 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.6s SsaConstructionTime, 4.7s SatisfiabilityAnalysisTime, 43.3s InterpolantComputationTime, 8982 NumberOfCodeBlocks, 8982 NumberOfCodeBlocksAsserted, 1118 NumberOfCheckSat, 8523 ConstructedInterpolants, 0 QuantifiedInterpolants, 805507 SizeOfPredicates, 2751 NumberOfNonLiveVariables, 27387 ConjunctsInSsa, 3605 ConjunctsInUnsatCore, 431 InterpolantComputations, 5 PerfectInterpolantSequences, 0/17250 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...