/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc config/AutomizerReach.xml -s config/svcomp-Reach-64bit-Automizer_Default.epf -i ../sv-benchmarks/c/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:33:13,022 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:33:13,027 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:33:13,086 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:33:13,086 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:33:13,092 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:33:13,096 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:33:13,105 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:33:13,109 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:33:13,117 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:33:13,119 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:33:13,121 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:33:13,121 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:33:13,125 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:33:13,127 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:33:13,129 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:33:13,131 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:33:13,135 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:33:13,144 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:33:13,152 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:33:13,157 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:33:13,158 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:33:13,160 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:33:13,182 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:33:13,186 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 10:33:13,186 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 10:33:13,187 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 10:33:13,189 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 10:33:13,190 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 10:33:13,191 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 10:33:13,191 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:33:13,192 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:33:13,194 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:33:13,195 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:33:13,197 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:33:13,197 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:33:13,198 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:33:13,198 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:33:13,198 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:33:13,200 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:33:13,200 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:33:13,202 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:33:13,252 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:33:13,252 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:33:13,257 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:33:13,258 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:33:13,258 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:33:13,259 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:33:13,259 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:33:13,259 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:33:13,259 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:33:13,259 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:33:13,261 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:33:13,261 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:33:13,261 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:33:13,261 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:33:13,262 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:33:13,262 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:33:13,262 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:33:13,262 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:33:13,262 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:33:13,263 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:33:13,263 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:33:13,263 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:33:13,263 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:33:13,263 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:33:13,264 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:33:13,264 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:33:13,661 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:33:13,693 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:33:13,697 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:33:13,698 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:33:13,699 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:33:13,700 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-1.i [2020-12-22 10:33:13,786 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee18bf568/a5d87f2cd9af4dbfb4f57f8aa83cabf0/FLAG322c230a0 [2020-12-22 10:33:14,645 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:33:14,645 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i [2020-12-22 10:33:14,662 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee18bf568/a5d87f2cd9af4dbfb4f57f8aa83cabf0/FLAG322c230a0 [2020-12-22 10:33:14,890 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/ee18bf568/a5d87f2cd9af4dbfb4f57f8aa83cabf0 [2020-12-22 10:33:14,894 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:33:14,896 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:33:14,899 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:33:14,899 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:33:14,903 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:33:14,904 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:33:14" (1/1) ... [2020-12-22 10:33:14,907 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@7210f482 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:14, skipping insertion in model container [2020-12-22 10:33:14,907 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:33:14" (1/1) ... [2020-12-22 10:33:14,916 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:33:14,988 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:33:15,445 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2020-12-22 10:33:15,450 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:33:15,462 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:33:15,558 WARN L226 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-1.i[30961,30974] [2020-12-22 10:33:15,562 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:33:15,687 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:33:15,687 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15 WrapperNode [2020-12-22 10:33:15,688 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:33:15,690 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:33:15,690 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:33:15,690 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:33:15,698 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,743 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,775 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:33:15,779 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:33:15,779 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:33:15,780 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:33:15,790 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,790 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,798 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,798 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,819 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,827 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,836 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... [2020-12-22 10:33:15,846 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:33:15,850 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:33:15,851 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:33:15,851 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:33:15,853 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:33:15,959 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-22 10:33:15,959 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-22 10:33:15,959 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-22 10:33:15,960 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-22 10:33:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 10:33:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-22 10:33:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:33:15,960 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 10:33:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:33:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-22 10:33:15,961 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:33:15,961 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:33:15,964 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-12-22 10:33:16,441 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:33:16,441 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-22 10:33:16,444 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:33:16 BoogieIcfgContainer [2020-12-22 10:33:16,444 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:33:16,446 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:33:16,446 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:33:16,450 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:33:16,450 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:33:14" (1/3) ... [2020-12-22 10:33:16,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ace443f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:33:16, skipping insertion in model container [2020-12-22 10:33:16,451 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:15" (2/3) ... [2020-12-22 10:33:16,451 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@3ace443f and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:33:16, skipping insertion in model container [2020-12-22 10:33:16,452 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:33:16" (3/3) ... [2020-12-22 10:33:16,453 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-12-22 10:33:16,460 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-22 10:33:16,461 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:33:16,466 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 10:33:16,467 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-22 10:33:16,495 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,496 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,496 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,497 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,497 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,497 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,498 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,499 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,499 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,500 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,500 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,501 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,501 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,502 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,502 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,503 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,503 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,504 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,504 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,505 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,506 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,506 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,506 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,506 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,507 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,507 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,508 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,508 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,508 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,508 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,509 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,509 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,509 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,509 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,509 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,512 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,512 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,513 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,513 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,513 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,518 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,519 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,519 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,519 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,520 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,520 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:16,522 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-22 10:33:16,542 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 10:33:16,571 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:33:16,572 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:33:16,572 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:33:16,573 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:33:16,573 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:33:16,573 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:33:16,574 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:33:16,574 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:33:16,587 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-22 10:33:16,590 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-22 10:33:16,593 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-22 10:33:16,596 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2020-12-22 10:33:16,637 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-12-22 10:33:16,637 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-22 10:33:16,645 INFO L84 FinitePrefix]: Finished finitePrefix Result has 65 conditions, 58 events. 5/58 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 78 event pairs, 0 based on Foata normal form. 0/52 useless extension candidates. Maximal degree in co-relation 42. Up to 2 conditions per place. [2020-12-22 10:33:16,650 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2020-12-22 10:33:18,698 WARN L197 SmtUtils]: Spent 126.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 10:33:18,870 WARN L197 SmtUtils]: Spent 123.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 10:33:19,558 WARN L197 SmtUtils]: Spent 319.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 10:33:19,717 WARN L197 SmtUtils]: Spent 156.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 10:33:20,010 WARN L197 SmtUtils]: Spent 291.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 10:33:20,152 WARN L197 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 10:33:20,177 INFO L131 LiptonReduction]: Checked pairs total: 998 [2020-12-22 10:33:20,178 INFO L133 LiptonReduction]: Total number of compositions: 52 [2020-12-22 10:33:20,184 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-22 10:33:20,194 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-22 10:33:20,196 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-22 10:33:20,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 10:33:20,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:20,204 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 10:33:20,204 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:20,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:20,211 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2020-12-22 10:33:20,222 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:20,222 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1574563816] [2020-12-22 10:33:20,222 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:20,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:20,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:20,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1574563816] [2020-12-22 10:33:20,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:20,471 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:33:20,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915945785] [2020-12-22 10:33:20,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:33:20,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:20,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:33:20,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:33:20,510 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-22 10:33:20,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:20,566 INFO L93 Difference]: Finished difference Result 59 states and 152 transitions. [2020-12-22 10:33:20,567 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:33:20,568 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 10:33:20,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:20,580 INFO L225 Difference]: With dead ends: 59 [2020-12-22 10:33:20,580 INFO L226 Difference]: Without dead ends: 38 [2020-12-22 10:33:20,582 INFO L677 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 [2020-12-22 10:33:20,603 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 38 states. [2020-12-22 10:33:20,620 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 38 to 38. [2020-12-22 10:33:20,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 10:33:20,623 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-12-22 10:33:20,625 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 6 [2020-12-22 10:33:20,625 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:20,625 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-12-22 10:33:20,625 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:33:20,625 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-12-22 10:33:20,626 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:33:20,626 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:20,627 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:20,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:33:20,627 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:20,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:20,628 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2020-12-22 10:33:20,628 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:20,628 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463818117] [2020-12-22 10:33:20,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:20,778 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:20,779 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463818117] [2020-12-22 10:33:20,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:20,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:33:20,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647932328] [2020-12-22 10:33:20,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:33:20,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:20,782 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:33:20,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:33:20,782 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand 5 states. [2020-12-22 10:33:20,835 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:20,835 INFO L93 Difference]: Finished difference Result 82 states and 192 transitions. [2020-12-22 10:33:20,837 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:33:20,837 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:33:20,838 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:20,842 INFO L225 Difference]: With dead ends: 82 [2020-12-22 10:33:20,843 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 10:33:20,845 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:33:20,847 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 10:33:20,864 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 52. [2020-12-22 10:33:20,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 10:33:20,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-12-22 10:33:20,869 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 8 [2020-12-22 10:33:20,869 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:20,870 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-12-22 10:33:20,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:33:20,870 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-12-22 10:33:20,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:33:20,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:20,874 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:20,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:33:20,875 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:20,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:20,875 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2020-12-22 10:33:20,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:20,878 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [408474537] [2020-12-22 10:33:20,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:20,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:20,977 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:20,977 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [408474537] [2020-12-22 10:33:20,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:20,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:33:20,978 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1664104072] [2020-12-22 10:33:20,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:33:20,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:20,980 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:33:20,980 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:33:20,980 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand 5 states. [2020-12-22 10:33:21,062 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:21,062 INFO L93 Difference]: Finished difference Result 70 states and 163 transitions. [2020-12-22 10:33:21,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:33:21,063 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:33:21,063 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:21,064 INFO L225 Difference]: With dead ends: 70 [2020-12-22 10:33:21,064 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 10:33:21,065 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:33:21,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 10:33:21,070 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 38. [2020-12-22 10:33:21,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 10:33:21,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 90 transitions. [2020-12-22 10:33:21,071 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 90 transitions. Word has length 8 [2020-12-22 10:33:21,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:21,072 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 90 transitions. [2020-12-22 10:33:21,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:33:21,072 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 90 transitions. [2020-12-22 10:33:21,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:33:21,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:21,073 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:21,073 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:33:21,074 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:21,074 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:21,074 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2020-12-22 10:33:21,075 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:21,075 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1301274268] [2020-12-22 10:33:21,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:21,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:21,153 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:21,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1301274268] [2020-12-22 10:33:21,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:21,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:33:21,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1779446383] [2020-12-22 10:33:21,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:33:21,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:21,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:33:21,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:33:21,156 INFO L87 Difference]: Start difference. First operand 38 states and 90 transitions. Second operand 6 states. [2020-12-22 10:33:21,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:21,254 INFO L93 Difference]: Finished difference Result 58 states and 134 transitions. [2020-12-22 10:33:21,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:33:21,255 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:33:21,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:21,256 INFO L225 Difference]: With dead ends: 58 [2020-12-22 10:33:21,256 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 10:33:21,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:33:21,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 10:33:21,262 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 44. [2020-12-22 10:33:21,262 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 44 states. [2020-12-22 10:33:21,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 44 states to 44 states and 107 transitions. [2020-12-22 10:33:21,263 INFO L78 Accepts]: Start accepts. Automaton has 44 states and 107 transitions. Word has length 10 [2020-12-22 10:33:21,263 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:21,264 INFO L481 AbstractCegarLoop]: Abstraction has 44 states and 107 transitions. [2020-12-22 10:33:21,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:33:21,264 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states and 107 transitions. [2020-12-22 10:33:21,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:33:21,265 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:21,265 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:21,265 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:33:21,265 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:21,266 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:21,266 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2020-12-22 10:33:21,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:21,267 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961702046] [2020-12-22 10:33:21,267 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:21,282 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:21,349 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:21,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961702046] [2020-12-22 10:33:21,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:21,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:33:21,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205810222] [2020-12-22 10:33:21,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:33:21,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:21,352 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:33:21,353 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:33:21,353 INFO L87 Difference]: Start difference. First operand 44 states and 107 transitions. Second operand 6 states. [2020-12-22 10:33:21,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:21,425 INFO L93 Difference]: Finished difference Result 78 states and 182 transitions. [2020-12-22 10:33:21,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:33:21,426 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:33:21,427 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:21,428 INFO L225 Difference]: With dead ends: 78 [2020-12-22 10:33:21,428 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 10:33:21,429 INFO L677 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 [2020-12-22 10:33:21,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 10:33:21,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-12-22 10:33:21,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 10:33:21,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 115 transitions. [2020-12-22 10:33:21,436 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 115 transitions. Word has length 10 [2020-12-22 10:33:21,437 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:21,438 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 115 transitions. [2020-12-22 10:33:21,438 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:33:21,438 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 115 transitions. [2020-12-22 10:33:21,439 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:33:21,439 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:21,439 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:21,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:33:21,439 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:21,440 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:21,440 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2020-12-22 10:33:21,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:21,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839344581] [2020-12-22 10:33:21,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:21,455 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:21,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:21,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839344581] [2020-12-22 10:33:21,512 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:21,512 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:33:21,512 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040456611] [2020-12-22 10:33:21,513 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:33:21,513 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:21,514 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:33:21,515 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:33:21,515 INFO L87 Difference]: Start difference. First operand 46 states and 115 transitions. Second operand 6 states. [2020-12-22 10:33:21,604 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:21,605 INFO L93 Difference]: Finished difference Result 56 states and 131 transitions. [2020-12-22 10:33:21,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:33:21,607 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:33:21,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:21,608 INFO L225 Difference]: With dead ends: 56 [2020-12-22 10:33:21,608 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 10:33:21,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 8 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:21,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 10:33:21,613 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 40. [2020-12-22 10:33:21,613 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 10:33:21,614 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-12-22 10:33:21,614 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-12-22 10:33:21,614 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:21,614 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-12-22 10:33:21,615 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:33:21,615 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-12-22 10:33:21,615 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:33:21,615 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:21,616 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:21,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:33:21,616 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:21,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:21,617 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 4 times [2020-12-22 10:33:21,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:21,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [8442228] [2020-12-22 10:33:21,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:21,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:21,724 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:21,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [8442228] [2020-12-22 10:33:21,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [941108631] [2020-12-22 10:33:21,725 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 [2020-12-22 10:33:21,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:21,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:21,808 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:33:21,813 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:21,890 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:21,891 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:21,891 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 10:33:21,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917150330] [2020-12-22 10:33:21,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:33:21,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:21,892 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:33:21,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:33:21,893 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 8 states. [2020-12-22 10:33:22,003 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:22,004 INFO L93 Difference]: Finished difference Result 55 states and 127 transitions. [2020-12-22 10:33:22,005 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:33:22,005 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-22 10:33:22,005 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:22,006 INFO L225 Difference]: With dead ends: 55 [2020-12-22 10:33:22,006 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 10:33:22,007 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=40, Invalid=70, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:33:22,008 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 10:33:22,014 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-22 10:33:22,015 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 10:33:22,015 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-12-22 10:33:22,016 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 11 [2020-12-22 10:33:22,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:22,016 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-12-22 10:33:22,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:33:22,016 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-12-22 10:33:22,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:33:22,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:22,017 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:22,230 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable6 [2020-12-22 10:33:22,231 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:22,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:22,233 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 5 times [2020-12-22 10:33:22,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:22,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2140242769] [2020-12-22 10:33:22,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:22,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:22,308 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:22,308 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2140242769] [2020-12-22 10:33:22,309 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [548064190] [2020-12-22 10:33:22,309 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 [2020-12-22 10:33:22,383 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:22,383 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:22,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:33:22,388 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:22,439 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:33:22,464 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:22,465 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:22,465 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 10:33:22,465 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924212835] [2020-12-22 10:33:22,465 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:33:22,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:22,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:33:22,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:33:22,469 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 8 states. [2020-12-22 10:33:22,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:22,634 INFO L93 Difference]: Finished difference Result 57 states and 135 transitions. [2020-12-22 10:33:22,634 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:33:22,634 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-22 10:33:22,635 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:22,637 INFO L225 Difference]: With dead ends: 57 [2020-12-22 10:33:22,637 INFO L226 Difference]: Without dead ends: 52 [2020-12-22 10:33:22,638 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 12 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:22,640 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-12-22 10:33:22,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 42. [2020-12-22 10:33:22,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 10:33:22,655 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-12-22 10:33:22,656 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-12-22 10:33:22,656 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:22,656 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-12-22 10:33:22,656 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:33:22,656 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-12-22 10:33:22,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:33:22,660 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:22,660 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:22,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:22,875 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:22,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:22,877 INFO L82 PathProgramCache]: Analyzing trace with hash -319965345, now seen corresponding path program 6 times [2020-12-22 10:33:22,877 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:22,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [471848909] [2020-12-22 10:33:22,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:22,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:22,981 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:22,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [471848909] [2020-12-22 10:33:22,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403174464] [2020-12-22 10:33:22,983 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 [2020-12-22 10:33:23,072 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:33:23,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:23,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:33:23,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:23,131 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:23,132 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:23,132 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 10:33:23,132 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [308544916] [2020-12-22 10:33:23,134 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:33:23,134 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:23,134 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:33:23,135 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:33:23,135 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand 8 states. [2020-12-22 10:33:23,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:23,274 INFO L93 Difference]: Finished difference Result 80 states and 187 transitions. [2020-12-22 10:33:23,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:33:23,275 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-22 10:33:23,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:23,276 INFO L225 Difference]: With dead ends: 80 [2020-12-22 10:33:23,276 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 10:33:23,277 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 21 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:33:23,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 10:33:23,281 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 46. [2020-12-22 10:33:23,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 10:33:23,282 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 117 transitions. [2020-12-22 10:33:23,282 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 117 transitions. Word has length 11 [2020-12-22 10:33:23,282 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:23,282 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 117 transitions. [2020-12-22 10:33:23,282 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:33:23,282 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 117 transitions. [2020-12-22 10:33:23,283 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:33:23,283 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:23,283 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:23,498 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:23,499 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:23,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:23,500 INFO L82 PathProgramCache]: Analyzing trace with hash -319943025, now seen corresponding path program 7 times [2020-12-22 10:33:23,500 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:23,501 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [262118891] [2020-12-22 10:33:23,501 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:23,513 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:23,581 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:23,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [262118891] [2020-12-22 10:33:23,581 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [5540420] [2020-12-22 10:33:23,582 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 [2020-12-22 10:33:23,653 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:23,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:33:23,656 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:23,687 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:23,687 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:23,687 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-12-22 10:33:23,688 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [288635642] [2020-12-22 10:33:23,688 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:33:23,688 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:23,689 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:33:23,689 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:33:23,689 INFO L87 Difference]: Start difference. First operand 46 states and 117 transitions. Second operand 8 states. [2020-12-22 10:33:23,855 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:23,856 INFO L93 Difference]: Finished difference Result 64 states and 153 transitions. [2020-12-22 10:33:23,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:33:23,857 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-12-22 10:33:23,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:23,858 INFO L225 Difference]: With dead ends: 64 [2020-12-22 10:33:23,864 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 10:33:23,865 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:23,868 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 10:33:23,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 38. [2020-12-22 10:33:23,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 38 states. [2020-12-22 10:33:23,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 91 transitions. [2020-12-22 10:33:23,873 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 91 transitions. Word has length 11 [2020-12-22 10:33:23,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:23,873 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 91 transitions. [2020-12-22 10:33:23,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:33:23,874 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 91 transitions. [2020-12-22 10:33:23,876 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:33:23,876 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:23,876 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:24,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:24,091 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:24,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:24,091 INFO L82 PathProgramCache]: Analyzing trace with hash 1426667684, now seen corresponding path program 8 times [2020-12-22 10:33:24,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:24,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1290950826] [2020-12-22 10:33:24,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:24,214 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1290950826] [2020-12-22 10:33:24,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2085369599] [2020-12-22 10:33:24,215 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 [2020-12-22 10:33:24,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:24,301 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:24,302 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:33:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:24,362 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:24,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:24,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 10:33:24,366 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1387983286] [2020-12-22 10:33:24,366 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:33:24,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:24,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:33:24,373 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:33:24,373 INFO L87 Difference]: Start difference. First operand 38 states and 91 transitions. Second operand 9 states. [2020-12-22 10:33:24,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:24,523 INFO L93 Difference]: Finished difference Result 51 states and 117 transitions. [2020-12-22 10:33:24,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:33:24,523 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-22 10:33:24,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:24,524 INFO L225 Difference]: With dead ends: 51 [2020-12-22 10:33:24,524 INFO L226 Difference]: Without dead ends: 45 [2020-12-22 10:33:24,525 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:24,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 45 states. [2020-12-22 10:33:24,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 45 to 42. [2020-12-22 10:33:24,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 10:33:24,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 99 transitions. [2020-12-22 10:33:24,528 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 99 transitions. Word has length 12 [2020-12-22 10:33:24,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:24,528 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 99 transitions. [2020-12-22 10:33:24,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:33:24,528 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 99 transitions. [2020-12-22 10:33:24,529 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:33:24,529 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:24,529 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:24,743 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 10:33:24,744 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:24,744 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:24,745 INFO L82 PathProgramCache]: Analyzing trace with hash -1239613902, now seen corresponding path program 9 times [2020-12-22 10:33:24,745 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:24,745 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1891681148] [2020-12-22 10:33:24,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:24,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:24,854 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1891681148] [2020-12-22 10:33:24,855 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [288402273] [2020-12-22 10:33:24,856 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 [2020-12-22 10:33:24,928 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:33:24,928 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:24,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:33:24,931 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:24,955 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:24,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:24,956 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-22 10:33:24,956 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [501263098] [2020-12-22 10:33:24,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:33:24,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:24,957 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:33:24,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:33:24,958 INFO L87 Difference]: Start difference. First operand 42 states and 99 transitions. Second operand 8 states. [2020-12-22 10:33:25,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:25,069 INFO L93 Difference]: Finished difference Result 72 states and 163 transitions. [2020-12-22 10:33:25,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:33:25,070 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-22 10:33:25,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:25,070 INFO L225 Difference]: With dead ends: 72 [2020-12-22 10:33:25,071 INFO L226 Difference]: Without dead ends: 66 [2020-12-22 10:33:25,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 15 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:25,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-12-22 10:33:25,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 46. [2020-12-22 10:33:25,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 10:33:25,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-12-22 10:33:25,075 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 12 [2020-12-22 10:33:25,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:25,076 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-12-22 10:33:25,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:33:25,076 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-12-22 10:33:25,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:33:25,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:25,076 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:25,283 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:25,284 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:25,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:25,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1217357142, now seen corresponding path program 10 times [2020-12-22 10:33:25,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:25,285 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822358541] [2020-12-22 10:33:25,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:25,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:25,349 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:25,349 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822358541] [2020-12-22 10:33:25,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689953082] [2020-12-22 10:33:25,350 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 [2020-12-22 10:33:25,430 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:25,431 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:25,432 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:33:25,433 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:25,468 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:25,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-12-22 10:33:25,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986225701] [2020-12-22 10:33:25,469 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-12-22 10:33:25,469 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:25,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-12-22 10:33:25,473 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-12-22 10:33:25,473 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand 8 states. [2020-12-22 10:33:25,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:25,611 INFO L93 Difference]: Finished difference Result 87 states and 203 transitions. [2020-12-22 10:33:25,611 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:33:25,611 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-12-22 10:33:25,612 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:25,612 INFO L225 Difference]: With dead ends: 87 [2020-12-22 10:33:25,613 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 10:33:25,613 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=72, Invalid=138, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:25,614 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 10:33:25,616 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 51. [2020-12-22 10:33:25,617 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 10:33:25,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 129 transitions. [2020-12-22 10:33:25,617 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 129 transitions. Word has length 12 [2020-12-22 10:33:25,617 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:25,618 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 129 transitions. [2020-12-22 10:33:25,618 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-12-22 10:33:25,618 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 129 transitions. [2020-12-22 10:33:25,618 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:33:25,618 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:25,618 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:25,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:25,833 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:25,833 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:25,834 INFO L82 PathProgramCache]: Analyzing trace with hash -1217334822, now seen corresponding path program 11 times [2020-12-22 10:33:25,834 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:25,834 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [565640068] [2020-12-22 10:33:25,835 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:25,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:25,922 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:25,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [565640068] [2020-12-22 10:33:25,923 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345681837] [2020-12-22 10:33:25,923 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 [2020-12-22 10:33:25,986 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:25,987 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:25,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:33:25,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:26,022 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:26,023 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:26,023 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 10:33:26,023 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [800047185] [2020-12-22 10:33:26,024 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:33:26,024 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:26,024 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:33:26,025 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:33:26,025 INFO L87 Difference]: Start difference. First operand 51 states and 129 transitions. Second operand 9 states. [2020-12-22 10:33:26,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:26,290 INFO L93 Difference]: Finished difference Result 71 states and 169 transitions. [2020-12-22 10:33:26,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:33:26,291 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-12-22 10:33:26,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:26,292 INFO L225 Difference]: With dead ends: 71 [2020-12-22 10:33:26,292 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 10:33:26,293 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 50 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=113, Invalid=229, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:33:26,293 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 10:33:26,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 46. [2020-12-22 10:33:26,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 10:33:26,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-12-22 10:33:26,298 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 12 [2020-12-22 10:33:26,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:26,300 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-12-22 10:33:26,300 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:33:26,300 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-12-22 10:33:26,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:33:26,301 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:26,301 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:26,515 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2020-12-22 10:33:26,516 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:26,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:26,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1750964035, now seen corresponding path program 12 times [2020-12-22 10:33:26,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:26,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746083370] [2020-12-22 10:33:26,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:26,612 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:26,612 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746083370] [2020-12-22 10:33:26,613 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [689061393] [2020-12-22 10:33:26,613 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 [2020-12-22 10:33:26,687 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:33:26,687 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:26,688 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:33:26,689 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:26,731 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:26,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:26,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 10:33:26,732 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2062102409] [2020-12-22 10:33:26,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:26,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:26,733 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:26,733 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:26,733 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand 10 states. [2020-12-22 10:33:26,908 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:26,908 INFO L93 Difference]: Finished difference Result 67 states and 155 transitions. [2020-12-22 10:33:26,909 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:33:26,909 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-22 10:33:26,909 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:26,910 INFO L225 Difference]: With dead ends: 67 [2020-12-22 10:33:26,910 INFO L226 Difference]: Without dead ends: 61 [2020-12-22 10:33:26,911 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=91, Invalid=215, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:33:26,911 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-12-22 10:33:26,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 47. [2020-12-22 10:33:26,914 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 47 states. [2020-12-22 10:33:26,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 47 states to 47 states and 115 transitions. [2020-12-22 10:33:26,914 INFO L78 Accepts]: Start accepts. Automaton has 47 states and 115 transitions. Word has length 13 [2020-12-22 10:33:26,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:26,915 INFO L481 AbstractCegarLoop]: Abstraction has 47 states and 115 transitions. [2020-12-22 10:33:26,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:26,915 INFO L276 IsEmpty]: Start isEmpty. Operand 47 states and 115 transitions. [2020-12-22 10:33:26,915 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:33:26,915 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:26,915 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:27,129 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 10:33:27,130 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:27,130 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:27,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1773220795, now seen corresponding path program 13 times [2020-12-22 10:33:27,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:27,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969029699] [2020-12-22 10:33:27,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:27,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:27,239 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:27,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969029699] [2020-12-22 10:33:27,239 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1018002620] [2020-12-22 10:33:27,239 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 [2020-12-22 10:33:27,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:27,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:33:27,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:27,349 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:27,350 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:27,350 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 10:33:27,350 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1581889068] [2020-12-22 10:33:27,351 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:27,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:27,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:27,352 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:27,352 INFO L87 Difference]: Start difference. First operand 47 states and 115 transitions. Second operand 10 states. [2020-12-22 10:33:27,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:27,561 INFO L93 Difference]: Finished difference Result 89 states and 209 transitions. [2020-12-22 10:33:27,561 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:27,561 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-22 10:33:27,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:27,562 INFO L225 Difference]: With dead ends: 89 [2020-12-22 10:33:27,563 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 10:33:27,563 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=137, Invalid=283, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:33:27,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 10:33:27,566 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 52. [2020-12-22 10:33:27,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 10:33:27,567 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 133 transitions. [2020-12-22 10:33:27,567 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 133 transitions. Word has length 13 [2020-12-22 10:33:27,567 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:27,568 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 133 transitions. [2020-12-22 10:33:27,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:27,568 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 133 transitions. [2020-12-22 10:33:27,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:33:27,568 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:27,568 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:27,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 10:33:27,782 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:27,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:27,783 INFO L82 PathProgramCache]: Analyzing trace with hash 1773243115, now seen corresponding path program 14 times [2020-12-22 10:33:27,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:27,784 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1545936796] [2020-12-22 10:33:27,784 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:27,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:27,905 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:27,905 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1545936796] [2020-12-22 10:33:27,906 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [472574995] [2020-12-22 10:33:27,906 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 [2020-12-22 10:33:27,968 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:27,968 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:27,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:27,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:28,016 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:28,017 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:28,017 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 9 [2020-12-22 10:33:28,017 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1308668732] [2020-12-22 10:33:28,018 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:33:28,019 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:28,020 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:33:28,024 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:33:28,024 INFO L87 Difference]: Start difference. First operand 52 states and 133 transitions. Second operand 11 states. [2020-12-22 10:33:28,373 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:28,374 INFO L93 Difference]: Finished difference Result 84 states and 198 transitions. [2020-12-22 10:33:28,374 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:28,374 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-12-22 10:33:28,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:28,375 INFO L225 Difference]: With dead ends: 84 [2020-12-22 10:33:28,375 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 10:33:28,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=163, Invalid=389, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:33:28,377 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 10:33:28,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 51. [2020-12-22 10:33:28,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 10:33:28,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 127 transitions. [2020-12-22 10:33:28,379 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 127 transitions. Word has length 13 [2020-12-22 10:33:28,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:28,380 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 127 transitions. [2020-12-22 10:33:28,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:33:28,380 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 127 transitions. [2020-12-22 10:33:28,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:28,380 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:28,381 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:28,593 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 10:33:28,594 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:28,594 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:28,595 INFO L82 PathProgramCache]: Analyzing trace with hash 933092168, now seen corresponding path program 15 times [2020-12-22 10:33:28,595 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:28,595 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579938045] [2020-12-22 10:33:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:28,612 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:28,698 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:28,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579938045] [2020-12-22 10:33:28,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [705620333] [2020-12-22 10:33:28,698 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 [2020-12-22 10:33:28,760 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:33:28,760 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:28,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:33:28,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:28,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:28,799 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:28,799 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 10:33:28,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1821379919] [2020-12-22 10:33:28,800 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:33:28,800 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:28,800 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:33:28,801 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:33:28,801 INFO L87 Difference]: Start difference. First operand 51 states and 127 transitions. Second operand 11 states. [2020-12-22 10:33:28,977 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:28,977 INFO L93 Difference]: Finished difference Result 66 states and 157 transitions. [2020-12-22 10:33:28,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:33:28,978 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-22 10:33:28,978 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:28,979 INFO L225 Difference]: With dead ends: 66 [2020-12-22 10:33:28,979 INFO L226 Difference]: Without dead ends: 60 [2020-12-22 10:33:28,981 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 44 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:33:28,982 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-12-22 10:33:28,987 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 55. [2020-12-22 10:33:28,988 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:33:28,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-22 10:33:28,993 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2020-12-22 10:33:28,993 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:28,993 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-22 10:33:28,993 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:33:28,993 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-22 10:33:28,994 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:28,994 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:28,994 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:29,201 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 10:33:29,202 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:29,202 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:29,203 INFO L82 PathProgramCache]: Analyzing trace with hash -1563003562, now seen corresponding path program 16 times [2020-12-22 10:33:29,203 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:29,204 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582008] [2020-12-22 10:33:29,204 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:29,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:29,333 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:29,333 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582008] [2020-12-22 10:33:29,334 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [983553338] [2020-12-22 10:33:29,334 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 [2020-12-22 10:33:29,410 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:29,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:29,412 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:29,413 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:29,444 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:29,444 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:29,445 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-22 10:33:29,445 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [189285355] [2020-12-22 10:33:29,445 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:29,445 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:29,446 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:29,446 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:29,446 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2020-12-22 10:33:29,611 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:29,612 INFO L93 Difference]: Finished difference Result 87 states and 199 transitions. [2020-12-22 10:33:29,612 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:33:29,613 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 10:33:29,613 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:29,614 INFO L225 Difference]: With dead ends: 87 [2020-12-22 10:33:29,614 INFO L226 Difference]: Without dead ends: 81 [2020-12-22 10:33:29,614 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:33:29,615 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-12-22 10:33:29,618 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 55. [2020-12-22 10:33:29,618 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:33:29,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-22 10:33:29,619 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2020-12-22 10:33:29,619 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:29,619 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-22 10:33:29,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:29,620 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-22 10:33:29,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:29,620 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:29,621 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:29,834 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,14 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:29,835 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:29,835 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:29,836 INFO L82 PathProgramCache]: Analyzing trace with hash -1649093682, now seen corresponding path program 17 times [2020-12-22 10:33:29,836 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:29,836 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686532085] [2020-12-22 10:33:29,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:29,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:29,963 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:29,963 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686532085] [2020-12-22 10:33:29,964 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080655410] [2020-12-22 10:33:29,964 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 [2020-12-22 10:33:30,033 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:33:30,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:30,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:30,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:30,064 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:30,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:30,064 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-22 10:33:30,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [398993345] [2020-12-22 10:33:30,066 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:30,066 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:30,066 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:30,067 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:30,067 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2020-12-22 10:33:30,270 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:30,271 INFO L93 Difference]: Finished difference Result 80 states and 185 transitions. [2020-12-22 10:33:30,271 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:33:30,271 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 10:33:30,271 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:30,272 INFO L225 Difference]: With dead ends: 80 [2020-12-22 10:33:30,272 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 10:33:30,273 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:33:30,273 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 10:33:30,275 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 55. [2020-12-22 10:33:30,275 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:33:30,275 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-22 10:33:30,276 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 14 [2020-12-22 10:33:30,276 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:30,276 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-22 10:33:30,276 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:30,276 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-22 10:33:30,277 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:30,277 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:30,277 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:30,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:30,492 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:30,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:30,493 INFO L82 PathProgramCache]: Analyzing trace with hash -1626836922, now seen corresponding path program 18 times [2020-12-22 10:33:30,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:30,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541697643] [2020-12-22 10:33:30,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:30,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:30,577 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:30,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541697643] [2020-12-22 10:33:30,577 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [729087256] [2020-12-22 10:33:30,577 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 [2020-12-22 10:33:30,652 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:33:30,652 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:30,654 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:33:30,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:30,702 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:30,702 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:30,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-22 10:33:30,703 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860240875] [2020-12-22 10:33:30,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:30,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:30,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:30,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:30,706 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 10 states. [2020-12-22 10:33:30,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:30,933 INFO L93 Difference]: Finished difference Result 97 states and 227 transitions. [2020-12-22 10:33:30,933 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:30,933 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 10:33:30,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:30,935 INFO L225 Difference]: With dead ends: 97 [2020-12-22 10:33:30,935 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 10:33:30,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:33:30,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 10:33:30,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 59. [2020-12-22 10:33:30,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 10:33:30,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 149 transitions. [2020-12-22 10:33:30,939 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 149 transitions. Word has length 14 [2020-12-22 10:33:30,940 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:30,940 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 149 transitions. [2020-12-22 10:33:30,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:30,940 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 149 transitions. [2020-12-22 10:33:30,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:30,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:30,941 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:31,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 10:33:31,154 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:31,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:31,155 INFO L82 PathProgramCache]: Analyzing trace with hash -1626814602, now seen corresponding path program 19 times [2020-12-22 10:33:31,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:31,156 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509081003] [2020-12-22 10:33:31,156 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:31,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:31,259 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509081003] [2020-12-22 10:33:31,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030639853] [2020-12-22 10:33:31,260 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 [2020-12-22 10:33:31,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:31,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:31,334 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:31,384 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:31,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:31,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-22 10:33:31,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [729612063] [2020-12-22 10:33:31,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:31,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:31,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:31,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:31,386 INFO L87 Difference]: Start difference. First operand 59 states and 149 transitions. Second operand 12 states. [2020-12-22 10:33:31,806 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:31,806 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2020-12-22 10:33:31,807 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:31,807 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-22 10:33:31,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:31,808 INFO L225 Difference]: With dead ends: 93 [2020-12-22 10:33:31,808 INFO L226 Difference]: Without dead ends: 80 [2020-12-22 10:33:31,809 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:33:31,809 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-12-22 10:33:31,811 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 52. [2020-12-22 10:33:31,811 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 10:33:31,812 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 126 transitions. [2020-12-22 10:33:31,812 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 126 transitions. Word has length 14 [2020-12-22 10:33:31,812 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:31,812 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 126 transitions. [2020-12-22 10:33:31,812 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:31,812 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 126 transitions. [2020-12-22 10:33:31,813 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:33:31,813 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:31,813 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:32,027 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:32,028 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:32,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:32,028 INFO L82 PathProgramCache]: Analyzing trace with hash -950727129, now seen corresponding path program 20 times [2020-12-22 10:33:32,029 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:32,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1332385644] [2020-12-22 10:33:32,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:32,049 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:32,157 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:32,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1332385644] [2020-12-22 10:33:32,158 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [371511616] [2020-12-22 10:33:32,158 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 [2020-12-22 10:33:32,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:32,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:32,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:33:32,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:32,260 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:32,260 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:32,260 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-12-22 10:33:32,260 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1099195941] [2020-12-22 10:33:32,261 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:33:32,261 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:32,261 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:33:32,261 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=83, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:33:32,262 INFO L87 Difference]: Start difference. First operand 52 states and 126 transitions. Second operand 11 states. [2020-12-22 10:33:32,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:32,496 INFO L93 Difference]: Finished difference Result 77 states and 177 transitions. [2020-12-22 10:33:32,497 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:32,497 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-22 10:33:32,497 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:32,497 INFO L225 Difference]: With dead ends: 77 [2020-12-22 10:33:32,498 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 10:33:32,498 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=299, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:33:32,499 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 10:33:32,501 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-12-22 10:33:32,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 10:33:32,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-12-22 10:33:32,502 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 15 [2020-12-22 10:33:32,502 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:32,502 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-12-22 10:33:32,502 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:33:32,502 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-12-22 10:33:32,503 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:33:32,503 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:32,503 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:32,703 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 10:33:32,704 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:32,705 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:32,705 INFO L82 PathProgramCache]: Analyzing trace with hash -1036817249, now seen corresponding path program 21 times [2020-12-22 10:33:32,705 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:32,705 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561466724] [2020-12-22 10:33:32,706 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:32,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:32,820 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:32,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561466724] [2020-12-22 10:33:32,820 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864227858] [2020-12-22 10:33:32,820 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 [2020-12-22 10:33:32,932 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:33:32,932 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:32,934 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:33:32,941 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:32,970 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:32,970 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:32,970 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-12-22 10:33:32,970 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915536098] [2020-12-22 10:33:32,971 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:33:32,971 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:32,972 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:33:32,973 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=84, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:33:32,973 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 11 states. [2020-12-22 10:33:33,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:33,224 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-12-22 10:33:33,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:33,225 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 15 [2020-12-22 10:33:33,225 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:33,226 INFO L225 Difference]: With dead ends: 83 [2020-12-22 10:33:33,226 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 10:33:33,226 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=168, Invalid=384, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:33:33,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 10:33:33,229 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-12-22 10:33:33,230 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:33:33,230 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-22 10:33:33,230 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 15 [2020-12-22 10:33:33,230 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:33,231 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-22 10:33:33,231 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:33:33,231 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-22 10:33:33,231 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:33:33,231 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:33,231 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:33,444 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-12-22 10:33:33,445 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:33,445 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:33,446 INFO L82 PathProgramCache]: Analyzing trace with hash -1014534325, now seen corresponding path program 22 times [2020-12-22 10:33:33,446 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:33,446 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31268511] [2020-12-22 10:33:33,446 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:33,457 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:33,528 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:33,528 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31268511] [2020-12-22 10:33:33,529 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025933717] [2020-12-22 10:33:33,529 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 [2020-12-22 10:33:33,605 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:33,605 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:33,606 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:33,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:33,637 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:33:33,653 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 8 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:33,654 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:33,654 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-22 10:33:33,654 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2048005045] [2020-12-22 10:33:33,654 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:33,654 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:33,655 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:33,655 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:33,655 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 12 states. [2020-12-22 10:33:34,002 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:34,003 INFO L93 Difference]: Finished difference Result 94 states and 224 transitions. [2020-12-22 10:33:34,003 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:33:34,003 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-22 10:33:34,004 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:34,004 INFO L225 Difference]: With dead ends: 94 [2020-12-22 10:33:34,005 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 10:33:34,005 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:33:34,006 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 10:33:34,008 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2020-12-22 10:33:34,008 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 10:33:34,008 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-12-22 10:33:34,009 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 15 [2020-12-22 10:33:34,009 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:34,009 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-12-22 10:33:34,009 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:34,009 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-12-22 10:33:34,010 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:34,010 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:34,010 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:34,219 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:33:34,220 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:34,220 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:34,221 INFO L82 PathProgramCache]: Analyzing trace with hash -946576148, now seen corresponding path program 23 times [2020-12-22 10:33:34,221 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:34,221 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705781891] [2020-12-22 10:33:34,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:34,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:34,350 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:34,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705781891] [2020-12-22 10:33:34,351 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [819856308] [2020-12-22 10:33:34,351 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 [2020-12-22 10:33:34,418 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:33:34,418 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:34,419 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:34,420 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:34,494 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:34,494 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:34,494 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 10:33:34,494 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1950801499] [2020-12-22 10:33:34,495 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:33:34,495 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:34,496 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:33:34,496 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:34,496 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 13 states. [2020-12-22 10:33:34,708 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:34,708 INFO L93 Difference]: Finished difference Result 76 states and 179 transitions. [2020-12-22 10:33:34,709 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:33:34,709 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-22 10:33:34,709 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:34,710 INFO L225 Difference]: With dead ends: 76 [2020-12-22 10:33:34,710 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 10:33:34,710 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:33:34,711 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 10:33:34,713 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-12-22 10:33:34,713 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:34,714 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-22 10:33:34,714 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-22 10:33:34,714 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:34,714 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-22 10:33:34,714 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:33:34,714 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-22 10:33:34,715 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:34,715 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:34,715 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:34,923 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 10:33:34,924 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:34,925 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:34,925 INFO L82 PathProgramCache]: Analyzing trace with hash 1192145786, now seen corresponding path program 24 times [2020-12-22 10:33:34,925 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:34,926 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560611263] [2020-12-22 10:33:34,926 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:34,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:35,039 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560611263] [2020-12-22 10:33:35,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [997164308] [2020-12-22 10:33:35,040 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 [2020-12-22 10:33:35,112 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 10:33:35,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:35,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:35,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:35,154 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:35,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:35,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 10:33:35,154 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500414953] [2020-12-22 10:33:35,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:35,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:35,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:35,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:35,156 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-22 10:33:35,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:35,379 INFO L93 Difference]: Finished difference Result 101 states and 229 transitions. [2020-12-22 10:33:35,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:33:35,380 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:35,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:35,381 INFO L225 Difference]: With dead ends: 101 [2020-12-22 10:33:35,381 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 10:33:35,382 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:33:35,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 10:33:35,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2020-12-22 10:33:35,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:35,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-22 10:33:35,385 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-22 10:33:35,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:35,385 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-22 10:33:35,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:35,386 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-22 10:33:35,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:35,386 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:35,386 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:35,601 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 10:33:35,602 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:35,602 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:35,603 INFO L82 PathProgramCache]: Analyzing trace with hash 63919090, now seen corresponding path program 25 times [2020-12-22 10:33:35,603 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:35,603 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728410333] [2020-12-22 10:33:35,604 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:35,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:35,713 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:35,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728410333] [2020-12-22 10:33:35,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1117194185] [2020-12-22 10:33:35,713 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 [2020-12-22 10:33:35,797 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:35,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:35,800 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:35,823 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:35,824 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:35,824 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 10:33:35,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2102602574] [2020-12-22 10:33:35,825 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:35,825 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:35,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:35,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:35,826 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-22 10:33:36,051 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:36,052 INFO L93 Difference]: Finished difference Result 94 states and 215 transitions. [2020-12-22 10:33:36,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:36,052 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:36,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:36,054 INFO L225 Difference]: With dead ends: 94 [2020-12-22 10:33:36,054 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 10:33:36,054 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:33:36,055 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 10:33:36,057 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-12-22 10:33:36,058 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:36,058 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-22 10:33:36,058 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-22 10:33:36,059 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:36,059 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-22 10:33:36,059 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:36,059 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-22 10:33:36,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:36,060 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:36,060 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:36,276 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:36,277 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:36,277 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:36,278 INFO L82 PathProgramCache]: Analyzing trace with hash -22171030, now seen corresponding path program 26 times [2020-12-22 10:33:36,278 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:36,278 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [215028510] [2020-12-22 10:33:36,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:36,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:36,398 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:36,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [215028510] [2020-12-22 10:33:36,398 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [310024479] [2020-12-22 10:33:36,398 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 [2020-12-22 10:33:36,480 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:36,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:36,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:36,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:36,522 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:36,522 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:36,523 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 10:33:36,523 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [993237249] [2020-12-22 10:33:36,524 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:36,524 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:36,526 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:36,526 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:36,526 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-22 10:33:36,856 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:36,856 INFO L93 Difference]: Finished difference Result 88 states and 203 transitions. [2020-12-22 10:33:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:36,857 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:36,858 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:36,858 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 10:33:36,860 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:33:36,860 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 10:33:36,865 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-12-22 10:33:36,865 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:36,866 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-22 10:33:36,866 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-22 10:33:36,866 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:36,866 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-22 10:33:36,866 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:36,867 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-22 10:33:36,867 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:36,867 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:36,867 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:37,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 10:33:37,083 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:37,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:37,083 INFO L82 PathProgramCache]: Analyzing trace with hash 111894, now seen corresponding path program 27 times [2020-12-22 10:33:37,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:37,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872094850] [2020-12-22 10:33:37,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:37,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:37,179 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:37,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872094850] [2020-12-22 10:33:37,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200674182] [2020-12-22 10:33:37,180 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 [2020-12-22 10:33:37,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:33:37,252 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:37,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:37,253 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 13 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:37,291 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:37,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 10:33:37,293 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85267827] [2020-12-22 10:33:37,293 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:37,293 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:37,293 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:37,294 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:37,294 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-22 10:33:37,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:37,675 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-12-22 10:33:37,675 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:37,676 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:37,676 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:37,677 INFO L225 Difference]: With dead ends: 85 [2020-12-22 10:33:37,677 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 10:33:37,678 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=221, Invalid=481, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:33:37,679 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 10:33:37,681 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-12-22 10:33:37,681 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:37,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-12-22 10:33:37,682 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 16 [2020-12-22 10:33:37,682 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:37,682 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-12-22 10:33:37,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:37,683 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-12-22 10:33:37,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:37,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:37,683 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:37,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:37,898 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:37,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:37,898 INFO L82 PathProgramCache]: Analyzing trace with hash 85730, now seen corresponding path program 28 times [2020-12-22 10:33:37,899 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:37,899 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659145232] [2020-12-22 10:33:37,899 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:37,908 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:37,994 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:37,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659145232] [2020-12-22 10:33:37,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375364032] [2020-12-22 10:33:37,995 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 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 [2020-12-22 10:33:38,093 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:38,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:38,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:38,095 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:38,133 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:38,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:38,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 10:33:38,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835362392] [2020-12-22 10:33:38,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:38,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:38,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:38,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:38,136 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 12 states. [2020-12-22 10:33:38,523 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:38,523 INFO L93 Difference]: Finished difference Result 110 states and 257 transitions. [2020-12-22 10:33:38,524 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:38,524 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:38,524 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:38,525 INFO L225 Difference]: With dead ends: 110 [2020-12-22 10:33:38,525 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 10:33:38,526 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:33:38,526 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 10:33:38,529 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2020-12-22 10:33:38,529 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:38,530 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-12-22 10:33:38,530 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 16 [2020-12-22 10:33:38,530 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:38,530 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-12-22 10:33:38,530 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:38,531 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-12-22 10:33:38,531 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:38,531 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:38,531 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:38,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 10:33:38,745 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:38,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:38,745 INFO L82 PathProgramCache]: Analyzing trace with hash 108050, now seen corresponding path program 29 times [2020-12-22 10:33:38,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:38,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [614584776] [2020-12-22 10:33:38,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:38,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:38,866 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:38,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [614584776] [2020-12-22 10:33:38,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606176797] [2020-12-22 10:33:38,866 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 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 [2020-12-22 10:33:38,936 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:33:38,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:38,937 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:38,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:38,975 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:38,976 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:38,976 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 10:33:38,976 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [123041446] [2020-12-22 10:33:38,977 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:33:38,977 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:38,978 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:33:38,978 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:38,978 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 13 states. [2020-12-22 10:33:39,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:39,510 INFO L93 Difference]: Finished difference Result 88 states and 209 transitions. [2020-12-22 10:33:39,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:39,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-22 10:33:39,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:39,512 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:39,512 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 10:33:39,513 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:33:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 10:33:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2020-12-22 10:33:39,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 10:33:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-12-22 10:33:39,516 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 16 [2020-12-22 10:33:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:39,517 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-12-22 10:33:39,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:33:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-12-22 10:33:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:39,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:39,517 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:39,730 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:39,731 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:39,731 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:39,732 INFO L82 PathProgramCache]: Analyzing trace with hash 1179278347, now seen corresponding path program 30 times [2020-12-22 10:33:39,732 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:39,732 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [405952216] [2020-12-22 10:33:39,732 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:39,742 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:39,869 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:39,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [405952216] [2020-12-22 10:33:39,869 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1484254938] [2020-12-22 10:33:39,870 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 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 [2020-12-22 10:33:39,944 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 10:33:39,945 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:39,945 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:39,946 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:39,990 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:39,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:39,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-22 10:33:39,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [198845486] [2020-12-22 10:33:39,991 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:33:39,991 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:39,991 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:33:39,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:39,991 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 13 states. [2020-12-22 10:33:40,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:40,303 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-12-22 10:33:40,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:40,303 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-22 10:33:40,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:40,304 INFO L225 Difference]: With dead ends: 83 [2020-12-22 10:33:40,304 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 10:33:40,305 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=170, Invalid=430, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:33:40,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 10:33:40,307 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-12-22 10:33:40,307 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:33:40,308 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-22 10:33:40,308 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-12-22 10:33:40,308 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:40,308 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-22 10:33:40,308 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:33:40,308 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-22 10:33:40,309 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:40,309 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:40,309 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:40,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 10:33:40,525 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:40,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:40,526 INFO L82 PathProgramCache]: Analyzing trace with hash 51051651, now seen corresponding path program 31 times [2020-12-22 10:33:40,526 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:40,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047462174] [2020-12-22 10:33:40,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:40,536 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:40,639 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:40,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047462174] [2020-12-22 10:33:40,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810546894] [2020-12-22 10:33:40,640 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 [2020-12-22 10:33:40,715 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:40,717 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:40,718 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:40,744 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:40,745 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:40,745 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-22 10:33:40,745 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2033042520] [2020-12-22 10:33:40,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:33:40,746 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:40,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:33:40,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:40,746 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 13 states. [2020-12-22 10:33:41,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:41,069 INFO L93 Difference]: Finished difference Result 90 states and 207 transitions. [2020-12-22 10:33:41,069 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:41,070 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-22 10:33:41,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:41,070 INFO L225 Difference]: With dead ends: 90 [2020-12-22 10:33:41,070 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 10:33:41,071 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:33:41,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 10:33:41,073 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-12-22 10:33:41,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 10:33:41,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-12-22 10:33:41,074 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-12-22 10:33:41,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:41,074 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-12-22 10:33:41,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:33:41,075 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-12-22 10:33:41,075 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:41,075 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:41,075 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:41,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:41,290 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:41,290 INFO L82 PathProgramCache]: Analyzing trace with hash -35038469, now seen corresponding path program 32 times [2020-12-22 10:33:41,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:41,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672590890] [2020-12-22 10:33:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:41,302 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:41,402 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:41,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672590890] [2020-12-22 10:33:41,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [41437477] [2020-12-22 10:33:41,403 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 [2020-12-22 10:33:41,467 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:41,467 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:41,468 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:41,469 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:41,491 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:41,491 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:41,492 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-22 10:33:41,492 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2141997752] [2020-12-22 10:33:41,492 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:33:41,492 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:41,493 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:33:41,493 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=121, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:41,493 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 13 states. [2020-12-22 10:33:41,883 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:41,883 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-12-22 10:33:41,883 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:41,884 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-22 10:33:41,884 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:41,885 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:41,885 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 10:33:41,885 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=264, Invalid=606, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:33:41,886 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 10:33:41,888 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-12-22 10:33:41,888 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 10:33:41,889 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-12-22 10:33:41,889 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-12-22 10:33:41,889 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:41,889 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-12-22 10:33:41,889 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:33:41,889 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-12-22 10:33:41,890 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:41,890 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:41,890 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:42,104 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 10:33:42,105 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:42,105 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:42,106 INFO L82 PathProgramCache]: Analyzing trace with hash -12781709, now seen corresponding path program 33 times [2020-12-22 10:33:42,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:42,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299788385] [2020-12-22 10:33:42,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:42,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:42,228 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:42,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299788385] [2020-12-22 10:33:42,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133390043] [2020-12-22 10:33:42,229 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 [2020-12-22 10:33:42,305 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 10:33:42,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:42,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:42,308 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:42,329 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:42,330 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:42,330 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-12-22 10:33:42,330 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1326771013] [2020-12-22 10:33:42,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:33:42,331 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:42,331 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:33:42,331 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:42,331 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 13 states. [2020-12-22 10:33:42,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:42,763 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-12-22 10:33:42,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:42,764 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 17 [2020-12-22 10:33:42,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:42,765 INFO L225 Difference]: With dead ends: 105 [2020-12-22 10:33:42,765 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 10:33:42,766 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 231 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=326, Invalid=666, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:33:42,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 10:33:42,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2020-12-22 10:33:42,770 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 10:33:42,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-12-22 10:33:42,770 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-12-22 10:33:42,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:42,770 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-12-22 10:33:42,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:33:42,771 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-12-22 10:33:42,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:42,771 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:42,771 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:42,972 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:42,972 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:42,973 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:42,973 INFO L82 PathProgramCache]: Analyzing trace with hash -12759389, now seen corresponding path program 34 times [2020-12-22 10:33:42,973 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:42,974 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [644708031] [2020-12-22 10:33:42,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:42,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:43,075 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:43,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [644708031] [2020-12-22 10:33:43,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1035159333] [2020-12-22 10:33:43,077 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 [2020-12-22 10:33:43,148 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:43,148 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:43,149 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:43,149 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:43,197 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:43,197 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 10:33:43,197 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178598123] [2020-12-22 10:33:43,198 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:33:43,198 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:43,198 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:33:43,199 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:33:43,199 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-12-22 10:33:43,761 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:43,761 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-12-22 10:33:43,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:43,762 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-22 10:33:43,762 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:43,763 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:43,763 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 10:33:43,764 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 245 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=350, Invalid=772, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:33:43,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 10:33:43,766 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2020-12-22 10:33:43,766 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 10:33:43,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-12-22 10:33:43,766 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-12-22 10:33:43,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:43,766 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-12-22 10:33:43,767 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:33:43,767 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-12-22 10:33:43,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:43,767 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:43,767 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:43,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 10:33:43,983 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:43,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:43,984 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 35 times [2020-12-22 10:33:43,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:43,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [972214301] [2020-12-22 10:33:43,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:44,006 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:44,188 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:44,188 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [972214301] [2020-12-22 10:33:44,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1887579962] [2020-12-22 10:33:44,189 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 [2020-12-22 10:33:44,267 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 10:33:44,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:44,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:44,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:44,340 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:44,340 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:44,340 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-22 10:33:44,341 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109899568] [2020-12-22 10:33:44,341 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:44,341 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:44,342 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:44,342 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:44,342 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 16 states. [2020-12-22 10:33:44,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:44,646 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-12-22 10:33:44,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:33:44,647 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-22 10:33:44,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:44,647 INFO L225 Difference]: With dead ends: 69 [2020-12-22 10:33:44,648 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 10:33:44,648 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:33:44,649 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 10:33:44,651 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-12-22 10:33:44,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 10:33:44,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-12-22 10:33:44,652 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-12-22 10:33:44,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:44,652 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-12-22 10:33:44,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:44,653 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-12-22 10:33:44,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:44,653 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:44,653 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:44,855 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-12-22 10:33:44,856 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:44,856 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:44,857 INFO L82 PathProgramCache]: Analyzing trace with hash -1104152418, now seen corresponding path program 36 times [2020-12-22 10:33:44,857 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:44,857 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1654165971] [2020-12-22 10:33:44,857 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:44,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:45,012 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:45,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1654165971] [2020-12-22 10:33:45,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612267926] [2020-12-22 10:33:45,013 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 [2020-12-22 10:33:45,108 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 10:33:45,108 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:45,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:33:45,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:45,161 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:45,162 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:45,162 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:45,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [902697434] [2020-12-22 10:33:45,163 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:45,163 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:45,163 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:45,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:45,163 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-12-22 10:33:45,396 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:45,397 INFO L93 Difference]: Finished difference Result 102 states and 229 transitions. [2020-12-22 10:33:45,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:45,397 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:45,398 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:45,398 INFO L225 Difference]: With dead ends: 102 [2020-12-22 10:33:45,399 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 10:33:45,399 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:33:45,399 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 10:33:45,401 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2020-12-22 10:33:45,401 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 10:33:45,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-12-22 10:33:45,402 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 18 [2020-12-22 10:33:45,402 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:45,402 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-12-22 10:33:45,403 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:45,403 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-12-22 10:33:45,403 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:45,403 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:45,403 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:45,616 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 10:33:45,617 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:45,617 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:45,617 INFO L82 PathProgramCache]: Analyzing trace with hash 1296718614, now seen corresponding path program 37 times [2020-12-22 10:33:45,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:45,618 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1117516298] [2020-12-22 10:33:45,618 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:45,629 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:45,749 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:45,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1117516298] [2020-12-22 10:33:45,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1062652434] [2020-12-22 10:33:45,750 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 [2020-12-22 10:33:45,820 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:45,822 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:45,823 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:45,862 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:45,863 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:45,863 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:45,863 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [379647052] [2020-12-22 10:33:45,863 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:45,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:45,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:45,864 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:45,864 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 15 states. [2020-12-22 10:33:46,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:46,150 INFO L93 Difference]: Finished difference Result 97 states and 221 transitions. [2020-12-22 10:33:46,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:46,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:46,151 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:46,152 INFO L225 Difference]: With dead ends: 97 [2020-12-22 10:33:46,152 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 10:33:46,152 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:33:46,153 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 10:33:46,155 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2020-12-22 10:33:46,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 10:33:46,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-12-22 10:33:46,156 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 18 [2020-12-22 10:33:46,156 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:46,156 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-12-22 10:33:46,156 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:46,156 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-12-22 10:33:46,156 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:46,157 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:46,157 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:46,371 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 10:33:46,372 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:46,372 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:46,372 INFO L82 PathProgramCache]: Analyzing trace with hash 168491918, now seen corresponding path program 38 times [2020-12-22 10:33:46,373 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:46,373 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1781126638] [2020-12-22 10:33:46,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:46,384 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:46,498 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:46,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1781126638] [2020-12-22 10:33:46,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1893237547] [2020-12-22 10:33:46,499 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 [2020-12-22 10:33:46,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:46,572 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:46,573 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:46,574 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:46,622 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:46,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:46,622 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:46,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1356503599] [2020-12-22 10:33:46,623 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:46,623 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:46,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:46,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:46,624 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 15 states. [2020-12-22 10:33:47,026 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:47,027 INFO L93 Difference]: Finished difference Result 95 states and 219 transitions. [2020-12-22 10:33:47,027 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:47,027 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:47,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:47,029 INFO L225 Difference]: With dead ends: 95 [2020-12-22 10:33:47,029 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 10:33:47,029 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:33:47,030 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 10:33:47,032 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2020-12-22 10:33:47,032 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 10:33:47,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-12-22 10:33:47,032 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 18 [2020-12-22 10:33:47,033 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:47,033 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-12-22 10:33:47,033 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:47,033 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-12-22 10:33:47,033 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:47,033 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:47,033 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:47,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:47,247 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:47,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:47,247 INFO L82 PathProgramCache]: Analyzing trace with hash 82401798, now seen corresponding path program 39 times [2020-12-22 10:33:47,248 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:47,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [296034100] [2020-12-22 10:33:47,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:47,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:47,365 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:47,365 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [296034100] [2020-12-22 10:33:47,366 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1965641228] [2020-12-22 10:33:47,366 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 [2020-12-22 10:33:47,444 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 10:33:47,444 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:47,445 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:33:47,446 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:47,496 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:47,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:47,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:47,497 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576636925] [2020-12-22 10:33:47,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:47,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:47,498 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:47,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:47,498 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 15 states. [2020-12-22 10:33:47,916 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:47,917 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2020-12-22 10:33:47,917 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:47,917 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:47,918 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:47,918 INFO L225 Difference]: With dead ends: 93 [2020-12-22 10:33:47,919 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 10:33:47,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 204 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:33:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 10:33:47,924 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2020-12-22 10:33:47,925 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 10:33:47,925 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-12-22 10:33:47,925 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-12-22 10:33:47,925 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:47,925 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-12-22 10:33:47,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:47,926 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-12-22 10:33:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:47,926 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:47,927 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:48,140 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 10:33:48,141 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:48,141 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:48,142 INFO L82 PathProgramCache]: Analyzing trace with hash 104658558, now seen corresponding path program 40 times [2020-12-22 10:33:48,142 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:48,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [299656869] [2020-12-22 10:33:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:48,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:48,275 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:48,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [299656869] [2020-12-22 10:33:48,275 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [177964996] [2020-12-22 10:33:48,276 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 [2020-12-22 10:33:48,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:48,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:48,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:48,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:48,387 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:48,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:48,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:48,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1061907958] [2020-12-22 10:33:48,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:48,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:48,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:48,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:48,389 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-12-22 10:33:48,869 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:48,869 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-12-22 10:33:48,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:48,870 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:48,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:48,871 INFO L225 Difference]: With dead ends: 111 [2020-12-22 10:33:48,871 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 10:33:48,874 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:33:48,875 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 10:33:48,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2020-12-22 10:33:48,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 10:33:48,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 177 transitions. [2020-12-22 10:33:48,879 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 177 transitions. Word has length 18 [2020-12-22 10:33:48,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:48,881 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 177 transitions. [2020-12-22 10:33:48,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:48,882 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 177 transitions. [2020-12-22 10:33:48,883 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:48,883 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:48,883 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:49,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable42 [2020-12-22 10:33:49,099 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:49,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:49,099 INFO L82 PathProgramCache]: Analyzing trace with hash 104680878, now seen corresponding path program 41 times [2020-12-22 10:33:49,099 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:49,099 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1070083430] [2020-12-22 10:33:49,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:49,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:49,227 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:49,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1070083430] [2020-12-22 10:33:49,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [287268942] [2020-12-22 10:33:49,228 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 [2020-12-22 10:33:49,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 10:33:49,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:49,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:49,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:49,395 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:49,395 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:49,396 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-22 10:33:49,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [620525665] [2020-12-22 10:33:49,397 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:49,397 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:49,397 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:49,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:49,398 INFO L87 Difference]: Start difference. First operand 69 states and 177 transitions. Second operand 16 states. [2020-12-22 10:33:50,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:50,067 INFO L93 Difference]: Finished difference Result 109 states and 259 transitions. [2020-12-22 10:33:50,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:33:50,068 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-22 10:33:50,068 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:50,069 INFO L225 Difference]: With dead ends: 109 [2020-12-22 10:33:50,069 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 10:33:50,069 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=447, Invalid=1035, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:33:50,070 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 10:33:50,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-12-22 10:33:50,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:50,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:50,072 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 18 [2020-12-22 10:33:50,073 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:50,073 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:50,073 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:50,073 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:50,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:50,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:50,074 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:50,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:50,287 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:50,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:50,287 INFO L82 PathProgramCache]: Analyzing trace with hash -584859409, now seen corresponding path program 42 times [2020-12-22 10:33:50,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:50,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1822752186] [2020-12-22 10:33:50,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:50,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:50,429 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:50,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1822752186] [2020-12-22 10:33:50,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2022644352] [2020-12-22 10:33:50,430 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 [2020-12-22 10:33:50,518 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 10:33:50,519 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:50,520 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:50,521 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:50,551 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:50,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:50,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:50,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560370006] [2020-12-22 10:33:50,552 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:50,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:50,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:50,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:50,553 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:50,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:50,929 INFO L93 Difference]: Finished difference Result 100 states and 235 transitions. [2020-12-22 10:33:50,929 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:50,930 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:50,930 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:50,931 INFO L225 Difference]: With dead ends: 100 [2020-12-22 10:33:50,931 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 10:33:50,931 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:33:50,932 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 10:33:50,935 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2020-12-22 10:33:50,935 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:50,935 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:50,935 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-22 10:33:50,936 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:50,936 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:50,936 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:50,936 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:50,936 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:50,937 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:50,937 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:51,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 10:33:51,144 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:51,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:51,144 INFO L82 PathProgramCache]: Analyzing trace with hash 1816011623, now seen corresponding path program 43 times [2020-12-22 10:33:51,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:51,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1561606756] [2020-12-22 10:33:51,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:51,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:51,283 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:51,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1561606756] [2020-12-22 10:33:51,283 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73837088] [2020-12-22 10:33:51,283 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 [2020-12-22 10:33:51,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:51,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:51,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:51,387 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:51,387 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:51,387 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:51,387 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1137715874] [2020-12-22 10:33:51,388 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:51,388 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:51,388 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:51,388 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:51,389 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:51,787 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:51,787 INFO L93 Difference]: Finished difference Result 107 states and 249 transitions. [2020-12-22 10:33:51,788 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:51,788 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:51,788 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:51,789 INFO L225 Difference]: With dead ends: 107 [2020-12-22 10:33:51,789 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 10:33:51,790 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=278, Invalid=714, Unknown=0, NotChecked=0, Total=992 [2020-12-22 10:33:51,790 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 10:33:51,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-12-22 10:33:51,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:51,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:51,793 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-22 10:33:51,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:51,794 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:51,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:51,794 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:51,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:51,795 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:51,795 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:52,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:52,008 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:52,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:52,009 INFO L82 PathProgramCache]: Analyzing trace with hash 687784927, now seen corresponding path program 44 times [2020-12-22 10:33:52,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:52,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [552667197] [2020-12-22 10:33:52,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:52,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:52,165 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:52,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [552667197] [2020-12-22 10:33:52,166 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [275497048] [2020-12-22 10:33:52,166 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 [2020-12-22 10:33:52,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:52,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:52,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:52,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:52,265 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:52,266 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:52,266 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:52,266 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017757916] [2020-12-22 10:33:52,267 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:52,267 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:52,267 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:52,267 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:52,267 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:52,723 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:52,723 INFO L93 Difference]: Finished difference Result 103 states and 241 transitions. [2020-12-22 10:33:52,724 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:52,724 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:52,724 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:52,725 INFO L225 Difference]: With dead ends: 103 [2020-12-22 10:33:52,725 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 10:33:52,726 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:33:52,727 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 10:33:52,729 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-12-22 10:33:52,729 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:52,729 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:52,729 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-22 10:33:52,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:52,730 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:52,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:52,730 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:52,730 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:52,730 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:52,730 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:52,939 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 10:33:52,940 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:52,940 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:52,941 INFO L82 PathProgramCache]: Analyzing trace with hash 601694807, now seen corresponding path program 45 times [2020-12-22 10:33:52,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:52,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962236728] [2020-12-22 10:33:52,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:52,952 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:53,080 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:53,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962236728] [2020-12-22 10:33:53,080 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1636292855] [2020-12-22 10:33:53,081 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 [2020-12-22 10:33:53,168 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 10:33:53,169 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:53,170 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:53,171 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:53,199 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:53,199 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:53,199 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:53,200 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [274392552] [2020-12-22 10:33:53,200 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:53,200 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:53,200 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:53,200 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:53,201 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:53,668 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:53,668 INFO L93 Difference]: Finished difference Result 99 states and 233 transitions. [2020-12-22 10:33:53,669 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:33:53,669 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:53,669 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:53,670 INFO L225 Difference]: With dead ends: 99 [2020-12-22 10:33:53,670 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 10:33:53,671 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:33:53,671 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 10:33:53,673 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2020-12-22 10:33:53,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:53,674 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:53,674 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-22 10:33:53,674 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:53,674 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:53,675 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:53,675 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:53,675 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:53,675 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:53,675 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:53,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:53,884 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:53,884 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:53,885 INFO L82 PathProgramCache]: Analyzing trace with hash 623951567, now seen corresponding path program 46 times [2020-12-22 10:33:53,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:53,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194806875] [2020-12-22 10:33:53,885 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:53,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:54,020 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:54,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194806875] [2020-12-22 10:33:54,021 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1207658395] [2020-12-22 10:33:54,021 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 [2020-12-22 10:33:54,092 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:54,093 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:54,094 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:54,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:54,124 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:54,124 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:54,124 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:54,125 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [346446307] [2020-12-22 10:33:54,125 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:54,125 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:54,125 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:54,126 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:54,126 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:54,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:54,695 INFO L93 Difference]: Finished difference Result 115 states and 273 transitions. [2020-12-22 10:33:54,696 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:33:54,696 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:54,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:54,697 INFO L225 Difference]: With dead ends: 115 [2020-12-22 10:33:54,697 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 10:33:54,699 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:33:54,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 10:33:54,701 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 72. [2020-12-22 10:33:54,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 10:33:54,702 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-12-22 10:33:54,702 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 19 [2020-12-22 10:33:54,702 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:54,702 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-12-22 10:33:54,703 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:54,703 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-12-22 10:33:54,703 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:54,703 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:54,703 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:54,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 10:33:54,919 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:54,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:54,919 INFO L82 PathProgramCache]: Analyzing trace with hash 623973887, now seen corresponding path program 47 times [2020-12-22 10:33:54,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:54,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1979905270] [2020-12-22 10:33:54,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:54,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:55,046 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:55,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1979905270] [2020-12-22 10:33:55,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1972942593] [2020-12-22 10:33:55,047 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 [2020-12-22 10:33:55,125 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 10:33:55,125 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:55,127 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:55,127 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:55,172 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:55,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:55,172 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 10:33:55,172 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339188709] [2020-12-22 10:33:55,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:55,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:55,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:55,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:55,174 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 16 states. [2020-12-22 10:33:55,865 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:55,865 INFO L93 Difference]: Finished difference Result 98 states and 237 transitions. [2020-12-22 10:33:55,866 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:33:55,866 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-22 10:33:55,866 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:55,867 INFO L225 Difference]: With dead ends: 98 [2020-12-22 10:33:55,867 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 10:33:55,868 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:33:55,869 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 10:33:55,871 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-12-22 10:33:55,871 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 10:33:55,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2020-12-22 10:33:55,872 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 19 [2020-12-22 10:33:55,872 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:55,872 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2020-12-22 10:33:55,872 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:55,872 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2020-12-22 10:33:55,872 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:55,873 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:55,873 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:56,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 10:33:56,077 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:56,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:56,078 INFO L82 PathProgramCache]: Analyzing trace with hash 1822436660, now seen corresponding path program 48 times [2020-12-22 10:33:56,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:56,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [897732186] [2020-12-22 10:33:56,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:56,091 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:56,276 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:56,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [897732186] [2020-12-22 10:33:56,277 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [491225777] [2020-12-22 10:33:56,277 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 [2020-12-22 10:33:56,352 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 10:33:56,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:56,354 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:33:56,354 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:56,409 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:56,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:56,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 10:33:56,409 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893427446] [2020-12-22 10:33:56,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:33:56,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:56,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:33:56,411 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:33:56,411 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand 17 states. [2020-12-22 10:33:56,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:56,819 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2020-12-22 10:33:56,822 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:33:56,822 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-22 10:33:56,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:56,823 INFO L225 Difference]: With dead ends: 90 [2020-12-22 10:33:56,823 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 10:33:56,824 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:33:56,825 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 10:33:56,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-12-22 10:33:56,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:56,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:56,828 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:56,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:56,828 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:56,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:33:56,828 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:56,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:56,829 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:56,829 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:57,042 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:57,043 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:57,043 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:57,043 INFO L82 PathProgramCache]: Analyzing trace with hash -233536318, now seen corresponding path program 49 times [2020-12-22 10:33:57,044 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:57,044 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [731362490] [2020-12-22 10:33:57,044 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:57,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:57,223 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:57,223 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [731362490] [2020-12-22 10:33:57,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1864378792] [2020-12-22 10:33:57,224 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 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 [2020-12-22 10:33:57,292 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:57,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:57,293 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:57,320 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:57,321 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:57,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:57,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [972965603] [2020-12-22 10:33:57,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:57,322 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:57,322 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:57,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:57,322 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:33:57,639 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:57,639 INFO L93 Difference]: Finished difference Result 123 states and 283 transitions. [2020-12-22 10:33:57,640 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:57,640 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:33:57,640 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:57,641 INFO L225 Difference]: With dead ends: 123 [2020-12-22 10:33:57,641 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 10:33:57,642 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:33:57,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 10:33:57,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2020-12-22 10:33:57,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:57,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:57,645 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:57,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:57,645 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:57,645 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:57,645 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:57,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:57,646 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:57,646 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:57,860 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 10:33:57,861 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:57,861 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:57,861 INFO L82 PathProgramCache]: Analyzing trace with hash 606087482, now seen corresponding path program 50 times [2020-12-22 10:33:57,862 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:57,862 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101343943] [2020-12-22 10:33:57,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:57,871 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:58,029 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101343943] [2020-12-22 10:33:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1079717675] [2020-12-22 10:33:58,030 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 [2020-12-22 10:33:58,097 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:58,097 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:58,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:58,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:58,134 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:58,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:58,134 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:58,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [245877656] [2020-12-22 10:33:58,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:58,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:58,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:58,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:58,136 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:33:58,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:58,460 INFO L93 Difference]: Finished difference Result 116 states and 269 transitions. [2020-12-22 10:33:58,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:58,461 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:33:58,461 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:58,462 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:33:58,462 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 10:33:58,463 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=260, Invalid=670, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:33:58,463 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 10:33:58,465 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2020-12-22 10:33:58,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:58,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:58,466 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:58,466 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:58,467 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:58,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:58,467 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:58,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:58,467 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:58,467 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:58,680 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:58,681 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:58,681 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:58,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1288008782, now seen corresponding path program 51 times [2020-12-22 10:33:58,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:58,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962175636] [2020-12-22 10:33:58,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:58,692 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:58,826 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:58,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962175636] [2020-12-22 10:33:58,827 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1230125038] [2020-12-22 10:33:58,827 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 [2020-12-22 10:33:58,906 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 10:33:58,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:58,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:33:58,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:58,945 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:58,945 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:58,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:58,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2042635385] [2020-12-22 10:33:58,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:58,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:58,947 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:58,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:58,947 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:33:59,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:59,371 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-12-22 10:33:59,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:59,371 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:33:59,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:59,373 INFO L225 Difference]: With dead ends: 112 [2020-12-22 10:33:59,373 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 10:33:59,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:33:59,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 10:33:59,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2020-12-22 10:33:59,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:59,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:59,377 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:59,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:59,377 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:59,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:59,377 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:59,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:59,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:59,378 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:59,580 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:59,581 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:59,581 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:59,581 INFO L82 PathProgramCache]: Analyzing trace with hash 1878731818, now seen corresponding path program 52 times [2020-12-22 10:33:59,582 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:59,582 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [85438539] [2020-12-22 10:33:59,582 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:59,596 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:59,732 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:59,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [85438539] [2020-12-22 10:33:59,733 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1200920446] [2020-12-22 10:33:59,733 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 [2020-12-22 10:33:59,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:59,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:59,806 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:59,806 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:59,836 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:59,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:59,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:59,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1902427385] [2020-12-22 10:33:59,837 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:59,837 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:59,837 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:59,838 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:59,838 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:34:00,351 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:00,351 INFO L93 Difference]: Finished difference Result 108 states and 253 transitions. [2020-12-22 10:34:00,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:00,352 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:34:00,352 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:00,353 INFO L225 Difference]: With dead ends: 108 [2020-12-22 10:34:00,353 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 10:34:00,354 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:34:00,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 10:34:00,357 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2020-12-22 10:34:00,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:34:00,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:34:00,358 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:34:00,358 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:00,358 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:34:00,358 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:34:00,358 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:34:00,359 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:34:00,359 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:00,359 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:00,559 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2020-12-22 10:34:00,560 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:00,561 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:00,561 INFO L82 PathProgramCache]: Analyzing trace with hash 1792641698, now seen corresponding path program 53 times [2020-12-22 10:34:00,561 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:00,562 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1669121312] [2020-12-22 10:34:00,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:00,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:00,702 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:00,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1669121312] [2020-12-22 10:34:00,702 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1892453818] [2020-12-22 10:34:00,702 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 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 [2020-12-22 10:34:00,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 10:34:00,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:00,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:34:00,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:00,814 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:00,815 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:00,815 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:34:00,815 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [809523712] [2020-12-22 10:34:00,816 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:34:00,816 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:00,816 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:34:00,816 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:34:00,817 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:34:01,416 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:01,416 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-12-22 10:34:01,417 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:01,417 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:34:01,417 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:01,418 INFO L225 Difference]: With dead ends: 104 [2020-12-22 10:34:01,418 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 10:34:01,419 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:34:01,419 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 10:34:01,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2020-12-22 10:34:01,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:34:01,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:34:01,422 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:34:01,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:01,423 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:34:01,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:34:01,423 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:34:01,423 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:34:01,423 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:01,423 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:01,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:01,638 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:01,638 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1814924622, now seen corresponding path program 54 times [2020-12-22 10:34:01,639 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:01,639 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [815261154] [2020-12-22 10:34:01,639 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:01,649 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:01,784 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:34:01,784 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [815261154] [2020-12-22 10:34:01,785 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328105469] [2020-12-22 10:34:01,786 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 [2020-12-22 10:34:01,880 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 10:34:01,880 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:01,881 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:34:01,882 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:01,931 INFO L134 CoverageAnalysis]: Checked inductivity of 31 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:34:01,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:01,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 10:34:01,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1144338234] [2020-12-22 10:34:01,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:34:01,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:01,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:34:01,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:34:01,933 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:34:02,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:02,606 INFO L93 Difference]: Finished difference Result 97 states and 235 transitions. [2020-12-22 10:34:02,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:02,607 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:34:02,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:02,608 INFO L225 Difference]: With dead ends: 97 [2020-12-22 10:34:02,608 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 10:34:02,609 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=442, Invalid=1040, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:34:02,609 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 10:34:02,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 70. [2020-12-22 10:34:02,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 10:34:02,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 175 transitions. [2020-12-22 10:34:02,612 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 175 transitions. Word has length 20 [2020-12-22 10:34:02,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:02,612 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 175 transitions. [2020-12-22 10:34:02,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:34:02,612 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 175 transitions. [2020-12-22 10:34:02,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:34:02,613 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:02,613 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:02,826 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 10:34:02,827 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:02,827 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:02,827 INFO L82 PathProgramCache]: Analyzing trace with hash 1814898458, now seen corresponding path program 55 times [2020-12-22 10:34:02,828 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:02,828 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970008996] [2020-12-22 10:34:02,828 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:02,837 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:02,969 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:02,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970008996] [2020-12-22 10:34:02,970 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [104150687] [2020-12-22 10:34:02,970 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 [2020-12-22 10:34:03,040 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:03,042 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:34:03,043 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:03,073 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:03,073 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:03,073 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:34:03,073 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1531880930] [2020-12-22 10:34:03,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:34:03,074 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:03,074 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:34:03,074 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:34:03,075 INFO L87 Difference]: Start difference. First operand 70 states and 175 transitions. Second operand 16 states. [2020-12-22 10:34:03,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:03,678 INFO L93 Difference]: Finished difference Result 119 states and 283 transitions. [2020-12-22 10:34:03,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:03,679 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:34:03,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:03,680 INFO L225 Difference]: With dead ends: 119 [2020-12-22 10:34:03,680 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 10:34:03,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 343 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=472, Invalid=1010, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:34:03,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 10:34:03,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 75. [2020-12-22 10:34:03,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 10:34:03,682 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 193 transitions. [2020-12-22 10:34:03,683 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 193 transitions. Word has length 20 [2020-12-22 10:34:03,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:03,683 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 193 transitions. [2020-12-22 10:34:03,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:34:03,683 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 193 transitions. [2020-12-22 10:34:03,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:34:03,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:03,683 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:03,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 10:34:03,884 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:03,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:03,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1814920778, now seen corresponding path program 56 times [2020-12-22 10:34:03,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:03,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1672135803] [2020-12-22 10:34:03,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:03,894 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:04,016 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:04,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1672135803] [2020-12-22 10:34:04,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1524131304] [2020-12-22 10:34:04,017 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 [2020-12-22 10:34:04,090 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:04,091 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:04,092 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:04,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:04,138 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:04,139 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:04,139 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 10:34:04,139 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708142477] [2020-12-22 10:34:04,139 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:34:04,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:04,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:34:04,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:34:04,143 INFO L87 Difference]: Start difference. First operand 75 states and 193 transitions. Second operand 17 states. [2020-12-22 10:34:04,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:04,944 INFO L93 Difference]: Finished difference Result 103 states and 249 transitions. [2020-12-22 10:34:04,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:04,945 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-22 10:34:04,945 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:04,946 INFO L225 Difference]: With dead ends: 103 [2020-12-22 10:34:04,946 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 10:34:04,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 361 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=462, Invalid=1178, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:34:04,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 10:34:04,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 62. [2020-12-22 10:34:04,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 10:34:04,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-12-22 10:34:04,954 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 20 [2020-12-22 10:34:04,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:04,954 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-12-22 10:34:04,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:34:04,955 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-12-22 10:34:04,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:04,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:04,955 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:05,168 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 10:34:05,169 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:05,169 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:05,169 INFO L82 PathProgramCache]: Analyzing trace with hash 590838995, now seen corresponding path program 57 times [2020-12-22 10:34:05,170 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:05,170 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979707282] [2020-12-22 10:34:05,170 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:05,178 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:05,368 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:05,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979707282] [2020-12-22 10:34:05,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [326280642] [2020-12-22 10:34:05,369 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 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 [2020-12-22 10:34:05,448 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 10:34:05,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:05,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:05,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:05,483 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:05,483 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:05,484 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-22 10:34:05,484 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437992078] [2020-12-22 10:34:05,484 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:34:05,484 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:05,485 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:34:05,485 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:34:05,485 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 17 states. [2020-12-22 10:34:05,958 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:05,958 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-12-22 10:34:05,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:34:05,959 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 10:34:05,959 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:05,960 INFO L225 Difference]: With dead ends: 99 [2020-12-22 10:34:05,960 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 10:34:05,960 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=298, Invalid=758, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:34:05,961 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 10:34:05,963 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-12-22 10:34:05,964 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:34:05,964 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-12-22 10:34:05,964 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-12-22 10:34:05,964 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:05,964 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-12-22 10:34:05,965 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:34:05,965 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-12-22 10:34:05,965 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:05,965 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:05,965 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:06,179 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 10:34:06,180 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:06,180 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:06,180 INFO L82 PathProgramCache]: Analyzing trace with hash 1430462795, now seen corresponding path program 58 times [2020-12-22 10:34:06,181 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:06,181 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [859832725] [2020-12-22 10:34:06,181 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:06,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:06,364 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [859832725] [2020-12-22 10:34:06,364 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2124783304] [2020-12-22 10:34:06,364 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 [2020-12-22 10:34:06,448 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:06,448 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:06,449 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:06,450 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:06,484 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:06,485 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:06,485 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-22 10:34:06,485 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1290382440] [2020-12-22 10:34:06,486 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:34:06,486 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:06,486 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:34:06,486 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:34:06,487 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 17 states. [2020-12-22 10:34:06,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:06,985 INFO L93 Difference]: Finished difference Result 110 states and 251 transitions. [2020-12-22 10:34:06,985 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:06,985 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 10:34:06,986 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:06,987 INFO L225 Difference]: With dead ends: 110 [2020-12-22 10:34:06,987 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 10:34:06,987 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=348, Invalid=912, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:34:06,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 10:34:06,989 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2020-12-22 10:34:06,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 10:34:06,990 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-12-22 10:34:06,990 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-12-22 10:34:06,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:06,990 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-12-22 10:34:06,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:34:06,991 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-12-22 10:34:06,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:06,991 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:06,991 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:07,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:07,205 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:07,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:07,205 INFO L82 PathProgramCache]: Analyzing trace with hash -463633469, now seen corresponding path program 59 times [2020-12-22 10:34:07,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:07,206 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229633731] [2020-12-22 10:34:07,206 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:07,216 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:07,401 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:07,401 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229633731] [2020-12-22 10:34:07,402 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [714360661] [2020-12-22 10:34:07,402 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 [2020-12-22 10:34:07,479 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 10:34:07,479 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:07,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:07,481 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:07,518 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:07,518 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:07,518 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-22 10:34:07,519 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959401421] [2020-12-22 10:34:07,519 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:34:07,519 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:07,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:34:07,520 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=219, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:34:07,520 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 17 states. [2020-12-22 10:34:08,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:08,089 INFO L93 Difference]: Finished difference Result 108 states and 249 transitions. [2020-12-22 10:34:08,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:08,089 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 10:34:08,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:08,090 INFO L225 Difference]: With dead ends: 108 [2020-12-22 10:34:08,090 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 10:34:08,091 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 304 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=390, Invalid=1016, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:34:08,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 10:34:08,094 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2020-12-22 10:34:08,095 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 10:34:08,095 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-12-22 10:34:08,095 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-12-22 10:34:08,095 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:08,095 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-12-22 10:34:08,096 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:34:08,096 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-12-22 10:34:08,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:08,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:08,096 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:08,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:08,312 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:08,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:08,312 INFO L82 PathProgramCache]: Analyzing trace with hash -1591860165, now seen corresponding path program 60 times [2020-12-22 10:34:08,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:08,313 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778058747] [2020-12-22 10:34:08,313 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:08,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:08,475 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:08,475 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778058747] [2020-12-22 10:34:08,476 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1489582542] [2020-12-22 10:34:08,476 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 [2020-12-22 10:34:08,564 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 10:34:08,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:08,565 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:08,566 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:08,598 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:08,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:08,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-22 10:34:08,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [763723561] [2020-12-22 10:34:08,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:34:08,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:08,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:34:08,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:34:08,600 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 17 states. [2020-12-22 10:34:09,124 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:09,125 INFO L93 Difference]: Finished difference Result 106 states and 247 transitions. [2020-12-22 10:34:09,125 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:09,125 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 10:34:09,125 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:09,126 INFO L225 Difference]: With dead ends: 106 [2020-12-22 10:34:09,126 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 10:34:09,127 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:34:09,127 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 10:34:09,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2020-12-22 10:34:09,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 10:34:09,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-12-22 10:34:09,129 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-12-22 10:34:09,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:09,130 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-12-22 10:34:09,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:34:09,130 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-12-22 10:34:09,130 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:09,130 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:09,130 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:09,343 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:09,344 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:09,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:09,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1677950285, now seen corresponding path program 61 times [2020-12-22 10:34:09,345 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:09,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2108979520] [2020-12-22 10:34:09,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:09,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:09,502 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:09,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2108979520] [2020-12-22 10:34:09,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [403424738] [2020-12-22 10:34:09,503 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 [2020-12-22 10:34:09,578 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:09,580 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:09,581 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:09,612 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:09,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:09,613 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-22 10:34:09,613 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [783030825] [2020-12-22 10:34:09,614 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:34:09,614 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:09,614 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:34:09,614 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:34:09,615 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 17 states. [2020-12-22 10:34:10,186 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:10,186 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-12-22 10:34:10,187 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:10,187 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 10:34:10,187 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:10,188 INFO L225 Difference]: With dead ends: 104 [2020-12-22 10:34:10,188 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 10:34:10,189 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 430 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=522, Invalid=1200, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:34:10,189 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 10:34:10,191 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2020-12-22 10:34:10,191 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 10:34:10,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-12-22 10:34:10,192 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-12-22 10:34:10,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:10,192 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-12-22 10:34:10,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:34:10,192 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-12-22 10:34:10,192 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:10,192 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:10,193 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:10,398 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable63 [2020-12-22 10:34:10,399 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:10,400 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:10,401 INFO L82 PathProgramCache]: Analyzing trace with hash -1655693525, now seen corresponding path program 62 times [2020-12-22 10:34:10,401 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:10,401 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1853269362] [2020-12-22 10:34:10,401 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:10,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:10,562 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:10,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1853269362] [2020-12-22 10:34:10,562 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1037051615] [2020-12-22 10:34:10,562 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 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 [2020-12-22 10:34:10,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:10,638 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:10,639 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:10,640 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:10,668 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:10,668 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:10,668 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-12-22 10:34:10,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1023013614] [2020-12-22 10:34:10,669 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:34:10,669 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:10,669 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:34:10,669 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:34:10,670 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 17 states. [2020-12-22 10:34:11,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:11,405 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-12-22 10:34:11,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:11,406 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 10:34:11,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:11,407 INFO L225 Difference]: With dead ends: 121 [2020-12-22 10:34:11,407 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 10:34:11,408 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 499 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=612, Invalid=1280, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:34:11,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 10:34:11,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2020-12-22 10:34:11,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 10:34:11,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-12-22 10:34:11,411 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-12-22 10:34:11,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:11,412 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-12-22 10:34:11,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:34:11,412 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-12-22 10:34:11,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:11,412 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:11,412 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:11,613 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:11,613 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:11,614 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:11,614 INFO L82 PathProgramCache]: Analyzing trace with hash -1655671205, now seen corresponding path program 63 times [2020-12-22 10:34:11,614 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:11,615 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [493058358] [2020-12-22 10:34:11,615 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:11,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:11,760 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:11,760 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [493058358] [2020-12-22 10:34:11,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2089363796] [2020-12-22 10:34:11,761 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 [2020-12-22 10:34:11,848 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 10:34:11,848 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:11,849 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:11,850 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:11,923 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:11,924 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:11,924 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 17 [2020-12-22 10:34:11,924 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [284500294] [2020-12-22 10:34:11,925 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:11,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:11,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:11,926 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:11,926 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 19 states. [2020-12-22 10:34:12,890 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:12,890 INFO L93 Difference]: Finished difference Result 116 states and 278 transitions. [2020-12-22 10:34:12,891 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:34:12,891 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 21 [2020-12-22 10:34:12,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:12,892 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:34:12,892 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 10:34:12,893 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 557 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=629, Invalid=1627, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:34:12,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 10:34:12,896 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 75. [2020-12-22 10:34:12,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 10:34:12,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 191 transitions. [2020-12-22 10:34:12,897 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 191 transitions. Word has length 21 [2020-12-22 10:34:12,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:12,898 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 191 transitions. [2020-12-22 10:34:12,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:12,898 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 191 transitions. [2020-12-22 10:34:12,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:12,898 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:12,899 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:13,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 10:34:13,111 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:13,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:13,112 INFO L82 PathProgramCache]: Analyzing trace with hash -985011240, now seen corresponding path program 64 times [2020-12-22 10:34:13,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:13,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970412425] [2020-12-22 10:34:13,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:13,132 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:13,385 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:13,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970412425] [2020-12-22 10:34:13,386 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1383467184] [2020-12-22 10:34:13,386 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 [2020-12-22 10:34:13,463 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:13,463 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:13,465 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:13,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:13,535 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:13,535 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:13,536 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:13,536 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [656941414] [2020-12-22 10:34:13,536 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:13,536 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:13,537 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:13,537 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:13,537 INFO L87 Difference]: Start difference. First operand 75 states and 191 transitions. Second operand 19 states. [2020-12-22 10:34:14,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:14,007 INFO L93 Difference]: Finished difference Result 98 states and 237 transitions. [2020-12-22 10:34:14,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:34:14,008 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:14,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:14,009 INFO L225 Difference]: With dead ends: 98 [2020-12-22 10:34:14,009 INFO L226 Difference]: Without dead ends: 92 [2020-12-22 10:34:14,010 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 188 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=370, Invalid=820, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:34:14,010 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-12-22 10:34:14,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 79. [2020-12-22 10:34:14,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:34:14,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-22 10:34:14,016 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-22 10:34:14,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:14,016 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-22 10:34:14,016 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:14,016 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-22 10:34:14,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:14,017 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:14,017 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:14,217 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:14,218 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:14,218 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:14,218 INFO L82 PathProgramCache]: Analyzing trace with hash -1090086938, now seen corresponding path program 65 times [2020-12-22 10:34:14,219 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:14,219 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [873871573] [2020-12-22 10:34:14,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:14,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:14,428 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:14,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [873871573] [2020-12-22 10:34:14,429 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809998000] [2020-12-22 10:34:14,429 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 [2020-12-22 10:34:14,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 10:34:14,509 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:14,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:14,511 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:14,541 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:14,542 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:14,542 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-22 10:34:14,542 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [867833481] [2020-12-22 10:34:14,542 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:14,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:14,543 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:14,543 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:14,543 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-22 10:34:14,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:14,914 INFO L93 Difference]: Finished difference Result 135 states and 311 transitions. [2020-12-22 10:34:14,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:34:14,915 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 10:34:14,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:14,919 INFO L225 Difference]: With dead ends: 135 [2020-12-22 10:34:14,919 INFO L226 Difference]: Without dead ends: 129 [2020-12-22 10:34:14,920 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 165 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:34:14,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-12-22 10:34:14,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 79. [2020-12-22 10:34:14,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:34:14,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-22 10:34:14,922 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-22 10:34:14,922 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:14,923 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-22 10:34:14,923 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:14,923 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-22 10:34:14,923 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:14,923 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:14,923 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:15,137 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-22 10:34:15,138 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:15,138 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:15,138 INFO L82 PathProgramCache]: Analyzing trace with hash -1665466786, now seen corresponding path program 66 times [2020-12-22 10:34:15,139 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:15,139 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1043291274] [2020-12-22 10:34:15,139 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:15,148 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:15,338 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:15,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1043291274] [2020-12-22 10:34:15,339 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573426851] [2020-12-22 10:34:15,339 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 [2020-12-22 10:34:15,414 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 10:34:15,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:15,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:15,416 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:15,457 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:15,457 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:15,457 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-22 10:34:15,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2093573730] [2020-12-22 10:34:15,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:15,458 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:15,458 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:15,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:15,459 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-22 10:34:15,888 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:15,889 INFO L93 Difference]: Finished difference Result 128 states and 297 transitions. [2020-12-22 10:34:15,889 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:34:15,889 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 10:34:15,889 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:15,890 INFO L225 Difference]: With dead ends: 128 [2020-12-22 10:34:15,890 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 10:34:15,891 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=332, Invalid=858, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:34:15,891 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 10:34:15,893 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 79. [2020-12-22 10:34:15,893 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:34:15,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-22 10:34:15,894 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-22 10:34:15,894 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:15,894 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-22 10:34:15,894 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:15,894 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-22 10:34:15,895 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:15,895 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:15,895 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:16,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:16,109 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:16,109 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:16,109 INFO L82 PathProgramCache]: Analyzing trace with hash -825842986, now seen corresponding path program 67 times [2020-12-22 10:34:16,110 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:16,110 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1945924635] [2020-12-22 10:34:16,110 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:16,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:16,323 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:16,323 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1945924635] [2020-12-22 10:34:16,324 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [48782937] [2020-12-22 10:34:16,324 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 [2020-12-22 10:34:16,396 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:16,397 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:16,398 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:16,439 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:16,440 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:16,440 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-22 10:34:16,440 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1364041613] [2020-12-22 10:34:16,440 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:16,440 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:16,441 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:16,441 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:16,441 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-22 10:34:16,991 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:16,991 INFO L93 Difference]: Finished difference Result 124 states and 289 transitions. [2020-12-22 10:34:16,991 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:16,992 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 10:34:16,992 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:16,993 INFO L225 Difference]: With dead ends: 124 [2020-12-22 10:34:16,993 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 10:34:16,994 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 253 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=359, Invalid=973, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:34:16,994 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 10:34:16,997 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 79. [2020-12-22 10:34:16,997 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:34:16,997 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-22 10:34:16,997 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-22 10:34:16,997 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:16,998 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-22 10:34:16,998 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:16,998 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-22 10:34:16,998 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:16,998 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:16,998 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:17,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 65 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 10:34:17,214 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:17,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:17,215 INFO L82 PathProgramCache]: Analyzing trace with hash 1575028046, now seen corresponding path program 68 times [2020-12-22 10:34:17,215 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:17,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [795318133] [2020-12-22 10:34:17,216 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:17,224 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:17,407 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:17,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [795318133] [2020-12-22 10:34:17,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1453029272] [2020-12-22 10:34:17,407 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 [2020-12-22 10:34:17,508 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:17,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:17,510 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:17,512 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:17,553 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:17,554 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:17,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-22 10:34:17,554 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783305738] [2020-12-22 10:34:17,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:17,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:17,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:17,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=248, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:17,556 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-22 10:34:18,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:18,126 INFO L93 Difference]: Finished difference Result 120 states and 281 transitions. [2020-12-22 10:34:18,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:18,126 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 10:34:18,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:18,127 INFO L225 Difference]: With dead ends: 120 [2020-12-22 10:34:18,128 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 10:34:18,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=402, Invalid=1080, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:34:18,129 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 10:34:18,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 79. [2020-12-22 10:34:18,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:34:18,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-22 10:34:18,132 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-22 10:34:18,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:18,132 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-22 10:34:18,132 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:18,132 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-22 10:34:18,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:18,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:18,133 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:18,348 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable70 [2020-12-22 10:34:18,349 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:18,349 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:18,349 INFO L82 PathProgramCache]: Analyzing trace with hash 446801350, now seen corresponding path program 69 times [2020-12-22 10:34:18,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:18,350 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1579766590] [2020-12-22 10:34:18,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:18,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:18,521 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:18,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1579766590] [2020-12-22 10:34:18,522 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1894210358] [2020-12-22 10:34:18,522 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 [2020-12-22 10:34:18,610 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 10:34:18,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:18,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:18,612 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:18,642 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:18,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:18,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-22 10:34:18,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866802722] [2020-12-22 10:34:18,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:18,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:18,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:18,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=246, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:18,644 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-22 10:34:19,300 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:19,300 INFO L93 Difference]: Finished difference Result 116 states and 273 transitions. [2020-12-22 10:34:19,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:19,301 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 10:34:19,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:19,302 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:34:19,302 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 10:34:19,303 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 357 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=461, Invalid=1179, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:34:19,303 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 10:34:19,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 79. [2020-12-22 10:34:19,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:34:19,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-22 10:34:19,306 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-22 10:34:19,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:19,307 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-22 10:34:19,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:19,307 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-22 10:34:19,307 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:19,307 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:19,308 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:19,522 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:19,523 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:19,523 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:19,523 INFO L82 PathProgramCache]: Analyzing trace with hash 360711230, now seen corresponding path program 70 times [2020-12-22 10:34:19,524 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:19,524 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201174604] [2020-12-22 10:34:19,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:19,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:19,708 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:19,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201174604] [2020-12-22 10:34:19,708 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [468412408] [2020-12-22 10:34:19,709 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 [2020-12-22 10:34:19,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:19,777 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:19,778 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:19,779 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:19,813 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:19,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:19,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-22 10:34:19,814 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1482373186] [2020-12-22 10:34:19,814 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:19,814 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:19,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:19,815 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=240, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:19,815 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-22 10:34:20,518 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:20,518 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-12-22 10:34:20,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:20,521 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 10:34:20,521 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:20,522 INFO L225 Difference]: With dead ends: 112 [2020-12-22 10:34:20,522 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 10:34:20,523 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 415 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=536, Invalid=1270, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:34:20,523 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 10:34:20,525 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 79. [2020-12-22 10:34:20,525 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:34:20,525 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 199 transitions. [2020-12-22 10:34:20,526 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 199 transitions. Word has length 22 [2020-12-22 10:34:20,526 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:20,526 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 199 transitions. [2020-12-22 10:34:20,526 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:20,526 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 199 transitions. [2020-12-22 10:34:20,526 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:20,526 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:20,527 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:20,741 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:20,742 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:20,742 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:20,742 INFO L82 PathProgramCache]: Analyzing trace with hash 382967990, now seen corresponding path program 71 times [2020-12-22 10:34:20,743 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:20,743 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [545331521] [2020-12-22 10:34:20,743 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:20,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:20,915 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:20,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [545331521] [2020-12-22 10:34:20,916 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1234525774] [2020-12-22 10:34:20,916 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 [2020-12-22 10:34:20,998 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 10:34:20,998 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:20,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:21,001 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:21,033 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:21,033 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:21,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-12-22 10:34:21,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [898865135] [2020-12-22 10:34:21,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:21,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:21,035 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:21,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:21,035 INFO L87 Difference]: Start difference. First operand 79 states and 199 transitions. Second operand 18 states. [2020-12-22 10:34:21,702 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:21,703 INFO L93 Difference]: Finished difference Result 129 states and 307 transitions. [2020-12-22 10:34:21,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:21,703 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 22 [2020-12-22 10:34:21,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:21,704 INFO L225 Difference]: With dead ends: 129 [2020-12-22 10:34:21,704 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 10:34:21,705 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 477 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=627, Invalid=1353, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:34:21,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 10:34:21,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 83. [2020-12-22 10:34:21,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 10:34:21,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 213 transitions. [2020-12-22 10:34:21,708 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 213 transitions. Word has length 22 [2020-12-22 10:34:21,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:21,708 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 213 transitions. [2020-12-22 10:34:21,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:21,708 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 213 transitions. [2020-12-22 10:34:21,709 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:21,709 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:21,709 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:21,917 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable73 [2020-12-22 10:34:21,918 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:21,918 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:21,919 INFO L82 PathProgramCache]: Analyzing trace with hash 382990310, now seen corresponding path program 72 times [2020-12-22 10:34:21,919 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:21,919 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361193313] [2020-12-22 10:34:21,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:21,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:22,080 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:22,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361193313] [2020-12-22 10:34:22,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [571210083] [2020-12-22 10:34:22,081 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 [2020-12-22 10:34:22,172 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 10:34:22,173 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:22,174 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:22,175 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:22,220 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:22,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:22,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:22,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2017278675] [2020-12-22 10:34:22,221 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:22,221 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:22,221 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:22,221 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:22,222 INFO L87 Difference]: Start difference. First operand 83 states and 213 transitions. Second operand 19 states. [2020-12-22 10:34:23,083 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:23,083 INFO L93 Difference]: Finished difference Result 113 states and 273 transitions. [2020-12-22 10:34:23,084 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:23,084 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:23,084 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:23,085 INFO L225 Difference]: With dead ends: 113 [2020-12-22 10:34:23,085 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 10:34:23,086 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 495 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=604, Invalid=1558, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 10:34:23,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 10:34:23,087 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 66. [2020-12-22 10:34:23,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 10:34:23,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-12-22 10:34:23,088 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 22 [2020-12-22 10:34:23,088 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:23,088 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-12-22 10:34:23,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:23,089 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-12-22 10:34:23,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:23,089 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:23,089 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:23,302 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:23,302 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:23,303 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:23,303 INFO L82 PathProgramCache]: Analyzing trace with hash 860606391, now seen corresponding path program 73 times [2020-12-22 10:34:23,303 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:23,303 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319568889] [2020-12-22 10:34:23,303 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:23,312 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:23,555 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:23,555 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319568889] [2020-12-22 10:34:23,556 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1458273923] [2020-12-22 10:34:23,556 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 [2020-12-22 10:34:23,627 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:23,628 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:23,629 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:23,683 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:23,683 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:23,683 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:23,684 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130419709] [2020-12-22 10:34:23,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:23,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:23,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:23,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:23,685 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand 20 states. [2020-12-22 10:34:24,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:24,231 INFO L93 Difference]: Finished difference Result 107 states and 245 transitions. [2020-12-22 10:34:24,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:24,232 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:24,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:24,233 INFO L225 Difference]: With dead ends: 107 [2020-12-22 10:34:24,234 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 10:34:24,234 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:34:24,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 10:34:24,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 67. [2020-12-22 10:34:24,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 10:34:24,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 165 transitions. [2020-12-22 10:34:24,237 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 165 transitions. Word has length 23 [2020-12-22 10:34:24,237 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:24,237 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 165 transitions. [2020-12-22 10:34:24,237 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:24,237 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 165 transitions. [2020-12-22 10:34:24,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:24,238 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:24,238 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:24,450 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-22 10:34:24,452 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:24,452 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:24,452 INFO L82 PathProgramCache]: Analyzing trace with hash 285226543, now seen corresponding path program 74 times [2020-12-22 10:34:24,453 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:24,453 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1953560075] [2020-12-22 10:34:24,453 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:24,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:24,660 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:24,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1953560075] [2020-12-22 10:34:24,660 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742491839] [2020-12-22 10:34:24,660 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 [2020-12-22 10:34:24,737 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:24,738 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:24,739 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:24,740 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:24,796 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:24,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:24,797 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:24,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1900730499] [2020-12-22 10:34:24,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:24,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:24,798 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:24,798 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:24,798 INFO L87 Difference]: Start difference. First operand 67 states and 165 transitions. Second operand 20 states. [2020-12-22 10:34:25,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:25,285 INFO L93 Difference]: Finished difference Result 120 states and 273 transitions. [2020-12-22 10:34:25,286 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:25,286 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:25,286 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:25,287 INFO L225 Difference]: With dead ends: 120 [2020-12-22 10:34:25,287 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 10:34:25,287 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:34:25,288 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 10:34:25,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 69. [2020-12-22 10:34:25,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 10:34:25,290 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 171 transitions. [2020-12-22 10:34:25,290 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 171 transitions. Word has length 23 [2020-12-22 10:34:25,290 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:25,290 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 171 transitions. [2020-12-22 10:34:25,290 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:25,290 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 171 transitions. [2020-12-22 10:34:25,291 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:25,291 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:25,291 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:25,491 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,72 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:25,492 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:25,492 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:25,493 INFO L82 PathProgramCache]: Analyzing trace with hash 1124850343, now seen corresponding path program 75 times [2020-12-22 10:34:25,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:25,493 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653864115] [2020-12-22 10:34:25,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:25,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:25,705 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:25,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653864115] [2020-12-22 10:34:25,706 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [345634117] [2020-12-22 10:34:25,706 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 [2020-12-22 10:34:25,785 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 10:34:25,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:25,787 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:25,787 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:25,847 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:25,847 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:25,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:25,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928622825] [2020-12-22 10:34:25,848 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:25,848 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:25,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:25,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:25,849 INFO L87 Difference]: Start difference. First operand 69 states and 171 transitions. Second operand 20 states. [2020-12-22 10:34:26,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:26,466 INFO L93 Difference]: Finished difference Result 118 states and 271 transitions. [2020-12-22 10:34:26,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:26,467 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:26,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:26,468 INFO L225 Difference]: With dead ends: 118 [2020-12-22 10:34:26,468 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 10:34:26,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=491, Invalid=1315, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:34:26,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 10:34:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 71. [2020-12-22 10:34:26,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 10:34:26,472 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 177 transitions. [2020-12-22 10:34:26,472 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 177 transitions. Word has length 23 [2020-12-22 10:34:26,472 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:26,472 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 177 transitions. [2020-12-22 10:34:26,472 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:26,472 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 177 transitions. [2020-12-22 10:34:26,473 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:26,473 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:26,473 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:26,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 10:34:26,688 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:26,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:26,688 INFO L82 PathProgramCache]: Analyzing trace with hash -769245921, now seen corresponding path program 76 times [2020-12-22 10:34:26,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:26,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440225846] [2020-12-22 10:34:26,689 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:26,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:26,921 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:26,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440225846] [2020-12-22 10:34:26,921 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108730201] [2020-12-22 10:34:26,922 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 [2020-12-22 10:34:26,997 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:26,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:26,998 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:26,999 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:27,054 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:27,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:27,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:27,055 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26737495] [2020-12-22 10:34:27,055 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:27,055 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:27,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:27,056 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:27,056 INFO L87 Difference]: Start difference. First operand 71 states and 177 transitions. Second operand 20 states. [2020-12-22 10:34:27,800 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:27,800 INFO L93 Difference]: Finished difference Result 116 states and 269 transitions. [2020-12-22 10:34:27,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:27,801 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:27,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:27,802 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:34:27,802 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 10:34:27,803 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=546, Invalid=1434, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:34:27,803 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 10:34:27,805 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2020-12-22 10:34:27,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:34:27,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:34:27,805 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 23 [2020-12-22 10:34:27,805 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:27,806 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:34:27,806 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:27,806 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:34:27,806 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:27,806 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:27,806 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:28,007 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:28,007 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:28,008 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:28,008 INFO L82 PathProgramCache]: Analyzing trace with hash -1897472617, now seen corresponding path program 77 times [2020-12-22 10:34:28,008 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:28,009 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1576107681] [2020-12-22 10:34:28,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:28,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:28,231 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:28,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1576107681] [2020-12-22 10:34:28,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [682917698] [2020-12-22 10:34:28,232 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 [2020-12-22 10:34:28,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 10:34:28,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:28,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:28,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:28,361 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:28,361 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:28,361 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:28,361 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998175047] [2020-12-22 10:34:28,362 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:28,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:28,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:28,362 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:28,362 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 20 states. [2020-12-22 10:34:29,069 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:29,069 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-12-22 10:34:29,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:29,070 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:29,070 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:29,071 INFO L225 Difference]: With dead ends: 114 [2020-12-22 10:34:29,071 INFO L226 Difference]: Without dead ends: 108 [2020-12-22 10:34:29,072 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 10:34:29,072 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-12-22 10:34:29,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-12-22 10:34:29,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 10:34:29,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-12-22 10:34:29,075 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 23 [2020-12-22 10:34:29,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:29,075 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-12-22 10:34:29,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:29,075 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-12-22 10:34:29,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:29,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:29,076 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:29,289 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 75 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-22 10:34:29,290 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:29,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:29,290 INFO L82 PathProgramCache]: Analyzing trace with hash -1983562737, now seen corresponding path program 78 times [2020-12-22 10:34:29,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:29,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251443861] [2020-12-22 10:34:29,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:29,299 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:29,509 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:29,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251443861] [2020-12-22 10:34:29,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [378063915] [2020-12-22 10:34:29,510 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 [2020-12-22 10:34:29,590 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 10:34:29,590 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:29,591 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:29,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:29,642 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:29,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:29,643 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:29,643 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1899450505] [2020-12-22 10:34:29,643 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:29,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:29,644 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:29,644 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:29,644 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand 20 states. [2020-12-22 10:34:30,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:30,467 INFO L93 Difference]: Finished difference Result 112 states and 265 transitions. [2020-12-22 10:34:30,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:34:30,468 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:30,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:30,469 INFO L225 Difference]: With dead ends: 112 [2020-12-22 10:34:30,469 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 10:34:30,470 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=704, Invalid=1648, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 10:34:30,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 10:34:30,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 77. [2020-12-22 10:34:30,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 10:34:30,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 195 transitions. [2020-12-22 10:34:30,473 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 195 transitions. Word has length 23 [2020-12-22 10:34:30,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:30,473 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 195 transitions. [2020-12-22 10:34:30,473 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:30,473 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 195 transitions. [2020-12-22 10:34:30,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:30,474 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:30,474 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:30,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:30,683 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:30,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:30,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1961305977, now seen corresponding path program 79 times [2020-12-22 10:34:30,684 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:30,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2141470153] [2020-12-22 10:34:30,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:30,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:30,899 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:30,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2141470153] [2020-12-22 10:34:30,899 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974872480] [2020-12-22 10:34:30,900 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 [2020-12-22 10:34:30,977 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:30,978 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:30,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:31,026 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:31,027 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:31,027 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:31,027 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [405657087] [2020-12-22 10:34:31,027 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:31,027 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:31,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:31,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:31,028 INFO L87 Difference]: Start difference. First operand 77 states and 195 transitions. Second operand 20 states. [2020-12-22 10:34:31,925 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:31,926 INFO L93 Difference]: Finished difference Result 129 states and 309 transitions. [2020-12-22 10:34:31,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:34:31,927 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:31,927 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:31,928 INFO L225 Difference]: With dead ends: 129 [2020-12-22 10:34:31,928 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 10:34:31,928 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 10:34:31,929 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 10:34:31,931 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 82. [2020-12-22 10:34:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 10:34:31,932 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 213 transitions. [2020-12-22 10:34:31,932 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 213 transitions. Word has length 23 [2020-12-22 10:34:31,932 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:31,932 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 213 transitions. [2020-12-22 10:34:31,932 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:31,933 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 213 transitions. [2020-12-22 10:34:31,933 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:31,933 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:31,933 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:32,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:32,148 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:32,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1961283657, now seen corresponding path program 80 times [2020-12-22 10:34:32,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:32,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [708274452] [2020-12-22 10:34:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:32,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:32,339 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:32,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [708274452] [2020-12-22 10:34:32,340 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [267480081] [2020-12-22 10:34:32,340 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 [2020-12-22 10:34:32,412 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:32,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:32,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:32,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:32,478 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:32,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:32,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-22 10:34:32,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628305842] [2020-12-22 10:34:32,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:32,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:32,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:32,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:32,480 INFO L87 Difference]: Start difference. First operand 82 states and 213 transitions. Second operand 21 states. [2020-12-22 10:34:33,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:33,666 INFO L93 Difference]: Finished difference Result 124 states and 298 transitions. [2020-12-22 10:34:33,666 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 10:34:33,666 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-22 10:34:33,667 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:33,668 INFO L225 Difference]: With dead ends: 124 [2020-12-22 10:34:33,668 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 10:34:33,668 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 727 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=793, Invalid=2069, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 10:34:33,669 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 10:34:33,671 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 81. [2020-12-22 10:34:33,671 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 10:34:33,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 207 transitions. [2020-12-22 10:34:33,671 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 207 transitions. Word has length 23 [2020-12-22 10:34:33,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:33,672 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 207 transitions. [2020-12-22 10:34:33,672 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:33,672 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 207 transitions. [2020-12-22 10:34:33,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:33,672 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:33,672 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:33,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,78 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:33,875 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:33,875 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:33,875 INFO L82 PathProgramCache]: Analyzing trace with hash -1702981252, now seen corresponding path program 81 times [2020-12-22 10:34:33,875 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:33,876 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [929549257] [2020-12-22 10:34:33,876 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:33,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:34,207 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:34,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [929549257] [2020-12-22 10:34:34,208 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700925648] [2020-12-22 10:34:34,208 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 [2020-12-22 10:34:34,298 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 10:34:34,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:34,300 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:34,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:34,384 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:34,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:34,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-22 10:34:34,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787009147] [2020-12-22 10:34:34,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:34,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:34,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:34,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:34,386 INFO L87 Difference]: Start difference. First operand 81 states and 207 transitions. Second operand 22 states. [2020-12-22 10:34:34,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:34,948 INFO L93 Difference]: Finished difference Result 106 states and 257 transitions. [2020-12-22 10:34:34,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:34:34,949 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-22 10:34:34,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:34,950 INFO L225 Difference]: With dead ends: 106 [2020-12-22 10:34:34,950 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 10:34:34,950 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=489, Invalid=1071, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:34:34,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 10:34:34,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 85. [2020-12-22 10:34:34,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:34,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-22 10:34:34,954 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-22 10:34:34,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:34,954 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-22 10:34:34,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:34,954 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-22 10:34:34,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:34,955 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:34,955 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:35,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:35,170 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:35,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:35,171 INFO L82 PathProgramCache]: Analyzing trace with hash 398488074, now seen corresponding path program 82 times [2020-12-22 10:34:35,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:35,171 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [173969169] [2020-12-22 10:34:35,171 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:35,180 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:35,451 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:35,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [173969169] [2020-12-22 10:34:35,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1490445996] [2020-12-22 10:34:35,452 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 [2020-12-22 10:34:35,530 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:35,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:35,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:35,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:35,593 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:35,594 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:35,594 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:35,594 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [794675105] [2020-12-22 10:34:35,594 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:35,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:35,595 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:35,595 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:35,595 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-22 10:34:36,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:36,122 INFO L93 Difference]: Finished difference Result 147 states and 339 transitions. [2020-12-22 10:34:36,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:34:36,123 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:36,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:36,124 INFO L225 Difference]: With dead ends: 147 [2020-12-22 10:34:36,124 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 10:34:36,125 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=431, Invalid=975, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:34:36,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 10:34:36,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 85. [2020-12-22 10:34:36,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:36,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-22 10:34:36,128 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-22 10:34:36,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:36,128 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-22 10:34:36,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:36,129 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-22 10:34:36,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:36,129 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:36,129 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:36,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:36,330 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:36,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:36,331 INFO L82 PathProgramCache]: Analyzing trace with hash 1509235330, now seen corresponding path program 83 times [2020-12-22 10:34:36,331 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:36,331 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [500057029] [2020-12-22 10:34:36,331 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:36,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:36,633 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:36,633 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [500057029] [2020-12-22 10:34:36,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [209131193] [2020-12-22 10:34:36,634 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 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 [2020-12-22 10:34:36,710 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 10:34:36,710 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:36,711 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:36,712 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:36,774 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:36,775 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:36,775 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:36,775 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [887768735] [2020-12-22 10:34:36,776 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:36,776 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:36,776 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:36,776 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:36,776 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-22 10:34:37,370 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:37,370 INFO L93 Difference]: Finished difference Result 140 states and 325 transitions. [2020-12-22 10:34:37,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:37,371 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:37,372 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:37,373 INFO L225 Difference]: With dead ends: 140 [2020-12-22 10:34:37,373 INFO L226 Difference]: Without dead ends: 134 [2020-12-22 10:34:37,373 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:34:37,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2020-12-22 10:34:37,376 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 85. [2020-12-22 10:34:37,376 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:37,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-22 10:34:37,376 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-22 10:34:37,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:37,377 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-22 10:34:37,377 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:37,377 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-22 10:34:37,377 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:37,377 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:37,377 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:37,578 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,81 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:37,578 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:37,579 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:37,579 INFO L82 PathProgramCache]: Analyzing trace with hash 933855482, now seen corresponding path program 84 times [2020-12-22 10:34:37,579 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:37,579 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570691336] [2020-12-22 10:34:37,580 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:37,587 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:37,853 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:37,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570691336] [2020-12-22 10:34:37,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198741883] [2020-12-22 10:34:37,854 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 [2020-12-22 10:34:37,936 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 10:34:37,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:37,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:37,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:37,999 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:38,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:38,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:38,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683072956] [2020-12-22 10:34:38,000 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:38,000 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:38,001 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:38,001 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:38,001 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-22 10:34:38,664 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:38,664 INFO L93 Difference]: Finished difference Result 136 states and 317 transitions. [2020-12-22 10:34:38,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:38,665 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:38,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:38,666 INFO L225 Difference]: With dead ends: 136 [2020-12-22 10:34:38,666 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 10:34:38,667 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:34:38,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 10:34:38,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 85. [2020-12-22 10:34:38,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:38,670 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-22 10:34:38,670 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-22 10:34:38,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:38,670 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-22 10:34:38,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:38,670 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-22 10:34:38,671 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:38,671 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:38,671 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:38,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:38,884 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:38,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:38,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1773479282, now seen corresponding path program 85 times [2020-12-22 10:34:38,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:38,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1136059637] [2020-12-22 10:34:38,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:38,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:39,150 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1136059637] [2020-12-22 10:34:39,151 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354727794] [2020-12-22 10:34:39,151 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 [2020-12-22 10:34:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:39,230 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:39,230 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:39,290 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:39,290 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:39,291 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:39,291 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289547522] [2020-12-22 10:34:39,291 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:39,291 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:39,291 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:39,292 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:39,292 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-22 10:34:40,030 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:40,030 INFO L93 Difference]: Finished difference Result 132 states and 309 transitions. [2020-12-22 10:34:40,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:40,031 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:40,031 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:40,032 INFO L225 Difference]: With dead ends: 132 [2020-12-22 10:34:40,032 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 10:34:40,033 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:34:40,033 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 10:34:40,035 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2020-12-22 10:34:40,035 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:40,036 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-22 10:34:40,036 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-22 10:34:40,036 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:40,036 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-22 10:34:40,036 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:40,036 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-22 10:34:40,037 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:40,037 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:40,037 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:40,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-22 10:34:40,238 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:40,238 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:40,239 INFO L82 PathProgramCache]: Analyzing trace with hash -120616982, now seen corresponding path program 86 times [2020-12-22 10:34:40,239 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:40,239 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549793170] [2020-12-22 10:34:40,239 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:40,248 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:40,452 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:40,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549793170] [2020-12-22 10:34:40,452 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [110936489] [2020-12-22 10:34:40,453 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 [2020-12-22 10:34:40,541 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:40,541 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:40,542 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:40,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:40,598 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:40,598 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:40,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:40,599 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001493338] [2020-12-22 10:34:40,599 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:40,599 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:40,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:40,600 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:40,600 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-22 10:34:41,392 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:41,392 INFO L93 Difference]: Finished difference Result 128 states and 301 transitions. [2020-12-22 10:34:41,393 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:41,393 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:41,394 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:41,395 INFO L225 Difference]: With dead ends: 128 [2020-12-22 10:34:41,395 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 10:34:41,395 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=559, Invalid=1511, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 10:34:41,396 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 10:34:41,400 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 85. [2020-12-22 10:34:41,400 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:41,400 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-22 10:34:41,401 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-22 10:34:41,401 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:41,401 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-22 10:34:41,401 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:41,401 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-22 10:34:41,401 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:41,401 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:41,402 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:41,615 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:41,616 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:41,616 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:41,616 INFO L82 PathProgramCache]: Analyzing trace with hash -1248843678, now seen corresponding path program 87 times [2020-12-22 10:34:41,617 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:41,617 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [259311864] [2020-12-22 10:34:41,617 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:41,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:41,835 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:41,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [259311864] [2020-12-22 10:34:41,836 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [584473705] [2020-12-22 10:34:41,836 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 [2020-12-22 10:34:41,939 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 10:34:41,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:41,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:41,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:41,997 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:41,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:41,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:41,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1368913882] [2020-12-22 10:34:41,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:41,999 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:41,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:41,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:41,999 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-22 10:34:42,748 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:42,749 INFO L93 Difference]: Finished difference Result 124 states and 293 transitions. [2020-12-22 10:34:42,749 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:42,749 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:42,750 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:42,751 INFO L225 Difference]: With dead ends: 124 [2020-12-22 10:34:42,751 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 10:34:42,751 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=631, Invalid=1625, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:34:42,751 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 10:34:42,753 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 85. [2020-12-22 10:34:42,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:42,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-22 10:34:42,754 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-22 10:34:42,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:42,754 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-22 10:34:42,754 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:42,754 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-22 10:34:42,755 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:42,755 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:42,755 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:42,970 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-22 10:34:42,971 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:42,971 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:42,971 INFO L82 PathProgramCache]: Analyzing trace with hash -1334933798, now seen corresponding path program 88 times [2020-12-22 10:34:42,972 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:42,972 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1548759634] [2020-12-22 10:34:42,972 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:42,979 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:43,197 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:43,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1548759634] [2020-12-22 10:34:43,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465044469] [2020-12-22 10:34:43,198 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 [2020-12-22 10:34:43,268 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:43,269 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:43,270 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:43,270 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:43,320 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:43,320 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:43,321 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:43,321 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [85545257] [2020-12-22 10:34:43,321 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:43,321 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:43,321 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:43,322 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:43,322 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-22 10:34:44,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:44,216 INFO L93 Difference]: Finished difference Result 120 states and 285 transitions. [2020-12-22 10:34:44,217 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:34:44,218 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:44,218 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:44,219 INFO L225 Difference]: With dead ends: 120 [2020-12-22 10:34:44,219 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 10:34:44,219 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=719, Invalid=1731, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 10:34:44,220 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 10:34:44,221 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 85. [2020-12-22 10:34:44,222 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:44,222 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 215 transitions. [2020-12-22 10:34:44,222 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 215 transitions. Word has length 24 [2020-12-22 10:34:44,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:44,222 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 215 transitions. [2020-12-22 10:34:44,222 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:44,222 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 215 transitions. [2020-12-22 10:34:44,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:44,223 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:44,223 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:44,428 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:44,429 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:44,429 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:44,429 INFO L82 PathProgramCache]: Analyzing trace with hash -1312677038, now seen corresponding path program 89 times [2020-12-22 10:34:44,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:44,430 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199016556] [2020-12-22 10:34:44,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:44,631 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:44,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199016556] [2020-12-22 10:34:44,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [718674982] [2020-12-22 10:34:44,632 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 [2020-12-22 10:34:44,708 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 10:34:44,708 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:44,710 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:44,711 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:44,757 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:44,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:44,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:44,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [424662435] [2020-12-22 10:34:44,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:44,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:44,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:44,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:44,759 INFO L87 Difference]: Start difference. First operand 85 states and 215 transitions. Second operand 21 states. [2020-12-22 10:34:45,784 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:45,784 INFO L93 Difference]: Finished difference Result 137 states and 327 transitions. [2020-12-22 10:34:45,785 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:34:45,785 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:45,785 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:45,786 INFO L225 Difference]: With dead ends: 137 [2020-12-22 10:34:45,786 INFO L226 Difference]: Without dead ends: 131 [2020-12-22 10:34:45,787 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=823, Invalid=1829, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 10:34:45,787 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-12-22 10:34:45,789 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 89. [2020-12-22 10:34:45,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 10:34:45,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 229 transitions. [2020-12-22 10:34:45,790 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 229 transitions. Word has length 24 [2020-12-22 10:34:45,790 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:45,790 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 229 transitions. [2020-12-22 10:34:45,790 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:45,791 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 229 transitions. [2020-12-22 10:34:45,791 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:45,791 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:45,791 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:46,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91,87 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:46,005 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:46,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:46,005 INFO L82 PathProgramCache]: Analyzing trace with hash -1312654718, now seen corresponding path program 90 times [2020-12-22 10:34:46,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:46,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [134682927] [2020-12-22 10:34:46,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:46,015 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:46,235 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:46,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [134682927] [2020-12-22 10:34:46,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1220901392] [2020-12-22 10:34:46,236 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 [2020-12-22 10:34:46,316 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 10:34:46,317 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:46,318 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:46,319 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:46,392 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:46,393 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:46,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-22 10:34:46,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058019060] [2020-12-22 10:34:46,393 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:46,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:46,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:46,394 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:46,394 INFO L87 Difference]: Start difference. First operand 89 states and 229 transitions. Second operand 22 states. [2020-12-22 10:34:47,481 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:47,481 INFO L93 Difference]: Finished difference Result 133 states and 317 transitions. [2020-12-22 10:34:47,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 10:34:47,482 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-22 10:34:47,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:47,483 INFO L225 Difference]: With dead ends: 133 [2020-12-22 10:34:47,484 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 10:34:47,484 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 713 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=806, Invalid=2164, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 10:34:47,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 10:34:47,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 72. [2020-12-22 10:34:47,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 10:34:47,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 176 transitions. [2020-12-22 10:34:47,487 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 176 transitions. Word has length 24 [2020-12-22 10:34:47,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:47,488 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 176 transitions. [2020-12-22 10:34:47,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:47,488 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 176 transitions. [2020-12-22 10:34:47,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:47,488 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:47,488 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:47,701 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:47,702 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:47,702 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:47,702 INFO L82 PathProgramCache]: Analyzing trace with hash -1885931109, now seen corresponding path program 91 times [2020-12-22 10:34:47,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:47,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1518704280] [2020-12-22 10:34:47,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:47,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:48,004 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:48,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1518704280] [2020-12-22 10:34:48,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354622485] [2020-12-22 10:34:48,005 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 [2020-12-22 10:34:48,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:48,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:48,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:48,163 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:48,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:48,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 10:34:48,164 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1787103960] [2020-12-22 10:34:48,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:48,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:48,165 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:48,165 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:48,165 INFO L87 Difference]: Start difference. First operand 72 states and 176 transitions. Second operand 22 states. [2020-12-22 10:34:48,817 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:48,817 INFO L93 Difference]: Finished difference Result 117 states and 267 transitions. [2020-12-22 10:34:48,818 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:48,818 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 10:34:48,818 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:48,819 INFO L225 Difference]: With dead ends: 117 [2020-12-22 10:34:48,819 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 10:34:48,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=493, Invalid=1229, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:34:48,820 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 10:34:48,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 73. [2020-12-22 10:34:48,822 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:34:48,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 179 transitions. [2020-12-22 10:34:48,822 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 179 transitions. Word has length 25 [2020-12-22 10:34:48,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:48,822 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 179 transitions. [2020-12-22 10:34:48,823 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:48,823 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 179 transitions. [2020-12-22 10:34:48,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:48,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:48,824 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:49,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:49,025 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:49,025 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:49,026 INFO L82 PathProgramCache]: Analyzing trace with hash -775183853, now seen corresponding path program 92 times [2020-12-22 10:34:49,026 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:49,026 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1063526134] [2020-12-22 10:34:49,026 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:49,034 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:49,318 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:49,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1063526134] [2020-12-22 10:34:49,318 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1605784320] [2020-12-22 10:34:49,323 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 [2020-12-22 10:34:49,400 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:49,400 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:49,401 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:49,406 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:49,460 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:49,460 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:49,460 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 10:34:49,460 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [178179171] [2020-12-22 10:34:49,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:49,461 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:49,461 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:49,461 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:49,461 INFO L87 Difference]: Start difference. First operand 73 states and 179 transitions. Second operand 22 states. [2020-12-22 10:34:50,138 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:50,138 INFO L93 Difference]: Finished difference Result 132 states and 299 transitions. [2020-12-22 10:34:50,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:50,139 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 10:34:50,139 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:50,140 INFO L225 Difference]: With dead ends: 132 [2020-12-22 10:34:50,140 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 10:34:50,141 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 402 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=545, Invalid=1435, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:34:50,141 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 10:34:50,144 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 75. [2020-12-22 10:34:50,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 75 states. [2020-12-22 10:34:50,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 185 transitions. [2020-12-22 10:34:50,145 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 185 transitions. Word has length 25 [2020-12-22 10:34:50,145 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:50,145 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 185 transitions. [2020-12-22 10:34:50,145 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:50,145 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 185 transitions. [2020-12-22 10:34:50,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:50,146 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:50,146 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:50,360 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:50,360 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:50,361 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:50,361 INFO L82 PathProgramCache]: Analyzing trace with hash -1350563701, now seen corresponding path program 93 times [2020-12-22 10:34:50,361 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:50,362 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776996762] [2020-12-22 10:34:50,362 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:50,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:50,658 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:50,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776996762] [2020-12-22 10:34:50,659 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [195817900] [2020-12-22 10:34:50,659 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 [2020-12-22 10:34:50,742 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 10:34:50,743 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:50,744 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:50,745 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:50,805 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:50,806 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:50,806 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 10:34:50,806 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [891274274] [2020-12-22 10:34:50,807 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:50,807 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:50,807 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:50,807 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:50,807 INFO L87 Difference]: Start difference. First operand 75 states and 185 transitions. Second operand 22 states. [2020-12-22 10:34:51,556 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:51,557 INFO L93 Difference]: Finished difference Result 130 states and 297 transitions. [2020-12-22 10:34:51,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:51,558 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 10:34:51,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:51,559 INFO L225 Difference]: With dead ends: 130 [2020-12-22 10:34:51,559 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 10:34:51,560 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 468 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=582, Invalid=1580, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 10:34:51,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 10:34:51,562 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 77. [2020-12-22 10:34:51,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-12-22 10:34:51,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 191 transitions. [2020-12-22 10:34:51,562 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 191 transitions. Word has length 25 [2020-12-22 10:34:51,562 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:51,563 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 191 transitions. [2020-12-22 10:34:51,563 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:51,563 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 191 transitions. [2020-12-22 10:34:51,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:51,563 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:51,563 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:51,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:51,766 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:51,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:51,766 INFO L82 PathProgramCache]: Analyzing trace with hash -510939901, now seen corresponding path program 94 times [2020-12-22 10:34:51,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:51,767 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [987293591] [2020-12-22 10:34:51,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:51,775 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:52,047 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:52,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [987293591] [2020-12-22 10:34:52,047 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1607953341] [2020-12-22 10:34:52,048 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 [2020-12-22 10:34:52,130 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:52,130 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:52,131 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:52,132 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:52,192 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:52,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:52,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 10:34:52,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648567311] [2020-12-22 10:34:52,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:52,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:52,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:52,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:52,193 INFO L87 Difference]: Start difference. First operand 77 states and 191 transitions. Second operand 22 states. [2020-12-22 10:34:53,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:53,015 INFO L93 Difference]: Finished difference Result 128 states and 295 transitions. [2020-12-22 10:34:53,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:53,016 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 10:34:53,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:53,017 INFO L225 Difference]: With dead ends: 128 [2020-12-22 10:34:53,017 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 10:34:53,018 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 544 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=635, Invalid=1717, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 10:34:53,018 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 10:34:53,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 79. [2020-12-22 10:34:53,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-12-22 10:34:53,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 197 transitions. [2020-12-22 10:34:53,020 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 197 transitions. Word has length 25 [2020-12-22 10:34:53,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:53,020 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 197 transitions. [2020-12-22 10:34:53,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:53,020 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 197 transitions. [2020-12-22 10:34:53,021 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:53,021 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:53,021 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:53,235 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable96 [2020-12-22 10:34:53,236 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:53,236 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:53,236 INFO L82 PathProgramCache]: Analyzing trace with hash 1889931131, now seen corresponding path program 95 times [2020-12-22 10:34:53,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:53,237 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [960410126] [2020-12-22 10:34:53,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:53,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:53,507 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:53,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [960410126] [2020-12-22 10:34:53,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [831315706] [2020-12-22 10:34:53,508 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 [2020-12-22 10:34:53,588 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 10:34:53,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:53,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:53,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:53,650 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:53,650 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:53,650 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 10:34:53,650 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1164866496] [2020-12-22 10:34:53,651 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:53,651 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:53,651 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:53,651 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:53,651 INFO L87 Difference]: Start difference. First operand 79 states and 197 transitions. Second operand 22 states. [2020-12-22 10:34:54,538 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:54,538 INFO L93 Difference]: Finished difference Result 126 states and 293 transitions. [2020-12-22 10:34:54,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:34:54,539 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 10:34:54,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:54,540 INFO L225 Difference]: With dead ends: 126 [2020-12-22 10:34:54,541 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 10:34:54,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 624 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=704, Invalid=1846, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 10:34:54,542 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 10:34:54,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 81. [2020-12-22 10:34:54,544 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 10:34:54,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 203 transitions. [2020-12-22 10:34:54,544 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 203 transitions. Word has length 25 [2020-12-22 10:34:54,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:54,544 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 203 transitions. [2020-12-22 10:34:54,544 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:54,544 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 203 transitions. [2020-12-22 10:34:54,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:54,545 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:54,545 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:54,745 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:54,745 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:54,746 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:54,746 INFO L82 PathProgramCache]: Analyzing trace with hash 761704435, now seen corresponding path program 96 times [2020-12-22 10:34:54,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:54,747 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874387921] [2020-12-22 10:34:54,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:54,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:55,010 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:55,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874387921] [2020-12-22 10:34:55,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [402049701] [2020-12-22 10:34:55,011 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 [2020-12-22 10:34:55,096 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 10:34:55,096 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:55,097 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:55,098 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:55,154 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:55,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:55,155 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 10:34:55,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835492514] [2020-12-22 10:34:55,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:55,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:55,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:55,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=375, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:55,155 INFO L87 Difference]: Start difference. First operand 81 states and 203 transitions. Second operand 22 states. [2020-12-22 10:34:56,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:56,114 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-12-22 10:34:56,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:34:56,114 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 10:34:56,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:56,116 INFO L225 Difference]: With dead ends: 124 [2020-12-22 10:34:56,116 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 10:34:56,116 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 708 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=789, Invalid=1967, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 10:34:56,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 10:34:56,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 83. [2020-12-22 10:34:56,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-12-22 10:34:56,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 209 transitions. [2020-12-22 10:34:56,119 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 209 transitions. Word has length 25 [2020-12-22 10:34:56,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:56,119 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 209 transitions. [2020-12-22 10:34:56,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:56,119 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 209 transitions. [2020-12-22 10:34:56,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:56,120 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:56,120 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:56,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-12-22 10:34:56,321 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:56,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:56,321 INFO L82 PathProgramCache]: Analyzing trace with hash 675614315, now seen corresponding path program 97 times [2020-12-22 10:34:56,322 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:56,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [390724576] [2020-12-22 10:34:56,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:56,329 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:56,559 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:56,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [390724576] [2020-12-22 10:34:56,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1959218090] [2020-12-22 10:34:56,560 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 [2020-12-22 10:34:56,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:56,633 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:56,634 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:56,685 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:56,685 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:56,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 10:34:56,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2119032916] [2020-12-22 10:34:56,686 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:56,686 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:56,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:56,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=367, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:56,686 INFO L87 Difference]: Start difference. First operand 83 states and 209 transitions. Second operand 22 states. [2020-12-22 10:34:57,663 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:57,664 INFO L93 Difference]: Finished difference Result 123 states and 291 transitions. [2020-12-22 10:34:57,664 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 10:34:57,664 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 10:34:57,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:57,666 INFO L225 Difference]: With dead ends: 123 [2020-12-22 10:34:57,666 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 10:34:57,666 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 796 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=890, Invalid=2080, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 10:34:57,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 10:34:57,669 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 85. [2020-12-22 10:34:57,669 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 85 states. [2020-12-22 10:34:57,669 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 216 transitions. [2020-12-22 10:34:57,669 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 216 transitions. Word has length 25 [2020-12-22 10:34:57,670 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:57,670 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 216 transitions. [2020-12-22 10:34:57,670 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:57,670 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 216 transitions. [2020-12-22 10:34:57,670 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:57,670 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:57,670 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:57,873 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,95 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:57,874 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:57,874 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:57,874 INFO L82 PathProgramCache]: Analyzing trace with hash 697897239, now seen corresponding path program 98 times [2020-12-22 10:34:57,874 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:57,875 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1399592221] [2020-12-22 10:34:57,875 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:57,882 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:58,113 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:34:58,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1399592221] [2020-12-22 10:34:58,113 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [772022548] [2020-12-22 10:34:58,113 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 [2020-12-22 10:34:58,189 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:58,190 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:58,191 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:58,192 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:58,243 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:34:58,267 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 63 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:34:58,267 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:58,267 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-22 10:34:58,268 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [184810658] [2020-12-22 10:34:58,268 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:58,268 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:58,268 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:58,269 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=101, Invalid=361, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:58,269 INFO L87 Difference]: Start difference. First operand 85 states and 216 transitions. Second operand 22 states. [2020-12-22 10:34:59,427 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:59,427 INFO L93 Difference]: Finished difference Result 134 states and 324 transitions. [2020-12-22 10:34:59,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 10:34:59,428 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 25 [2020-12-22 10:34:59,428 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:59,429 INFO L225 Difference]: With dead ends: 134 [2020-12-22 10:34:59,429 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 10:34:59,430 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 840 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=978, Invalid=2102, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 10:34:59,430 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 10:34:59,432 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 89. [2020-12-22 10:34:59,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 89 states. [2020-12-22 10:34:59,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 89 states to 89 states and 225 transitions. [2020-12-22 10:34:59,433 INFO L78 Accepts]: Start accepts. Automaton has 89 states and 225 transitions. Word has length 25 [2020-12-22 10:34:59,433 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:59,433 INFO L481 AbstractCegarLoop]: Abstraction has 89 states and 225 transitions. [2020-12-22 10:34:59,433 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:59,433 INFO L276 IsEmpty]: Start isEmpty. Operand 89 states and 225 transitions. [2020-12-22 10:34:59,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:59,433 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:59,434 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:59,647 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-12-22 10:34:59,648 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:59,648 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:59,649 INFO L82 PathProgramCache]: Analyzing trace with hash -182428128, now seen corresponding path program 99 times [2020-12-22 10:34:59,649 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:59,649 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [541116048] [2020-12-22 10:34:59,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:59,659 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:59,981 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:59,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [541116048] [2020-12-22 10:34:59,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548716560] [2020-12-22 10:34:59,981 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 [2020-12-22 10:35:00,073 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 10:35:00,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:00,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:35:00,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:00,158 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:00,158 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:00,158 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-22 10:35:00,159 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [304852494] [2020-12-22 10:35:00,159 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 10:35:00,159 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:00,159 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 10:35:00,160 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=137, Invalid=415, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:35:00,160 INFO L87 Difference]: Start difference. First operand 89 states and 225 transitions. Second operand 24 states. [2020-12-22 10:35:00,755 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:00,756 INFO L93 Difference]: Finished difference Result 116 states and 279 transitions. [2020-12-22 10:35:00,756 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:35:00,756 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 10:35:00,757 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:00,758 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:35:00,758 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 10:35:00,758 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=592, Invalid=1300, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:35:00,759 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 10:35:00,760 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 93. [2020-12-22 10:35:00,760 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:00,761 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:00,761 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:00,761 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:00,761 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:00,761 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 10:35:00,761 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:00,763 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:00,763 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:00,763 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:00,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-22 10:35:00,977 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:00,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:00,977 INFO L82 PathProgramCache]: Analyzing trace with hash 694965038, now seen corresponding path program 100 times [2020-12-22 10:35:00,977 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:00,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [529535375] [2020-12-22 10:35:00,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:00,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:01,346 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:01,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [529535375] [2020-12-22 10:35:01,346 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1976604721] [2020-12-22 10:35:01,346 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 [2020-12-22 10:35:01,429 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:35:01,429 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:01,430 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:01,431 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:01,495 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:01,496 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:01,496 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:35:01,496 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2140460642] [2020-12-22 10:35:01,496 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:01,496 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:01,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:01,497 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:01,497 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:02,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:02,160 INFO L93 Difference]: Finished difference Result 161 states and 369 transitions. [2020-12-22 10:35:02,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:35:02,161 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:02,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:02,162 INFO L225 Difference]: With dead ends: 161 [2020-12-22 10:35:02,162 INFO L226 Difference]: Without dead ends: 155 [2020-12-22 10:35:02,162 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 277 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=528, Invalid=1194, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:35:02,163 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-22 10:35:02,165 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 93. [2020-12-22 10:35:02,165 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:02,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:02,165 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:02,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:02,166 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:02,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:02,166 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:02,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:02,166 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:02,166 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:02,379 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 98 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-22 10:35:02,380 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:02,380 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:02,380 INFO L82 PathProgramCache]: Analyzing trace with hash -1323778650, now seen corresponding path program 101 times [2020-12-22 10:35:02,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:02,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [620221467] [2020-12-22 10:35:02,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:02,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:02,724 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:02,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [620221467] [2020-12-22 10:35:02,724 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2025658463] [2020-12-22 10:35:02,725 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 [2020-12-22 10:35:02,802 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 10:35:02,802 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:02,803 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:02,804 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:02,872 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:02,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:02,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:35:02,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [91778466] [2020-12-22 10:35:02,873 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:02,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:02,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:02,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=110, Invalid=396, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:02,874 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:03,549 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:03,549 INFO L93 Difference]: Finished difference Result 154 states and 355 transitions. [2020-12-22 10:35:03,550 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:35:03,550 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:03,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:03,551 INFO L225 Difference]: With dead ends: 154 [2020-12-22 10:35:03,551 INFO L226 Difference]: Without dead ends: 148 [2020-12-22 10:35:03,551 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 334 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=534, Invalid=1358, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:35:03,552 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-12-22 10:35:03,554 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 93. [2020-12-22 10:35:03,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:03,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:03,554 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:03,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:03,554 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:03,555 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:03,555 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:03,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:03,555 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:03,555 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:03,770 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:03,771 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:03,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:03,771 INFO L82 PathProgramCache]: Analyzing trace with hash -213031394, now seen corresponding path program 102 times [2020-12-22 10:35:03,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:03,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [760473794] [2020-12-22 10:35:03,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:03,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:04,093 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [760473794] [2020-12-22 10:35:04,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325396232] [2020-12-22 10:35:04,093 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 [2020-12-22 10:35:04,181 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 10:35:04,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:04,183 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:04,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:04,256 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:04,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:04,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:35:04,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091579870] [2020-12-22 10:35:04,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:04,258 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:04,258 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:04,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=407, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:04,258 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:05,029 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:05,029 INFO L93 Difference]: Finished difference Result 150 states and 347 transitions. [2020-12-22 10:35:05,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:35:05,030 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:05,030 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:05,031 INFO L225 Difference]: With dead ends: 150 [2020-12-22 10:35:05,031 INFO L226 Difference]: Without dead ends: 144 [2020-12-22 10:35:05,031 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 395 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 10:35:05,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-12-22 10:35:05,033 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 93. [2020-12-22 10:35:05,034 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:05,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:05,034 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:05,035 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:05,035 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:05,035 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:05,035 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:05,035 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:05,035 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:05,035 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:05,249 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable104 [2020-12-22 10:35:05,250 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:05,250 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:05,250 INFO L82 PathProgramCache]: Analyzing trace with hash -788411242, now seen corresponding path program 103 times [2020-12-22 10:35:05,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:05,251 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130673352] [2020-12-22 10:35:05,251 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:05,258 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:05,574 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130673352] [2020-12-22 10:35:05,575 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [810814447] [2020-12-22 10:35:05,575 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 [2020-12-22 10:35:05,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:05,652 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:05,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:05,718 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:05,718 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:05,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:35:05,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1086847413] [2020-12-22 10:35:05,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:05,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:05,719 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:05,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=414, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:05,720 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:06,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:06,536 INFO L93 Difference]: Finished difference Result 146 states and 339 transitions. [2020-12-22 10:35:06,539 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:35:06,539 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:06,540 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:06,540 INFO L225 Difference]: With dead ends: 146 [2020-12-22 10:35:06,540 INFO L226 Difference]: Without dead ends: 140 [2020-12-22 10:35:06,541 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 460 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=594, Invalid=1662, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:35:06,541 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-12-22 10:35:06,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 93. [2020-12-22 10:35:06,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:06,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:06,543 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:06,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:06,543 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:06,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:06,544 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:06,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:06,544 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:06,544 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:06,744 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,101 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:06,745 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:06,745 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:06,746 INFO L82 PathProgramCache]: Analyzing trace with hash 51212558, now seen corresponding path program 104 times [2020-12-22 10:35:06,746 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:06,746 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [277253279] [2020-12-22 10:35:06,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:06,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:07,017 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:07,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [277253279] [2020-12-22 10:35:07,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1090942915] [2020-12-22 10:35:07,017 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 [2020-12-22 10:35:07,105 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:35:07,105 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:07,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:07,107 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:07,169 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:07,169 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:07,169 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:35:07,169 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [280555651] [2020-12-22 10:35:07,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:07,170 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:07,170 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:07,170 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=417, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:07,170 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:08,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:08,050 INFO L93 Difference]: Finished difference Result 142 states and 331 transitions. [2020-12-22 10:35:08,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:35:08,051 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:08,051 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:08,052 INFO L225 Difference]: With dead ends: 142 [2020-12-22 10:35:08,052 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 10:35:08,052 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 529 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=648, Invalid=1802, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 10:35:08,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 10:35:08,054 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 93. [2020-12-22 10:35:08,054 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:08,055 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:08,055 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:08,055 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:08,055 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:08,055 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:08,055 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:08,056 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:08,056 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:08,056 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:08,264 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-12-22 10:35:08,265 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:08,265 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:08,265 INFO L82 PathProgramCache]: Analyzing trace with hash -1842883706, now seen corresponding path program 105 times [2020-12-22 10:35:08,266 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:08,266 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [7844736] [2020-12-22 10:35:08,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:08,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:08,545 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:08,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [7844736] [2020-12-22 10:35:08,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [802657524] [2020-12-22 10:35:08,546 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 [2020-12-22 10:35:08,626 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 10:35:08,626 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:08,627 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:08,628 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:08,689 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:08,689 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:08,689 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:35:08,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926685630] [2020-12-22 10:35:08,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:08,690 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:08,690 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:08,690 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=416, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:08,691 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:09,678 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:09,678 INFO L93 Difference]: Finished difference Result 138 states and 323 transitions. [2020-12-22 10:35:09,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:35:09,679 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:09,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:09,680 INFO L225 Difference]: With dead ends: 138 [2020-12-22 10:35:09,680 INFO L226 Difference]: Without dead ends: 132 [2020-12-22 10:35:09,680 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 602 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=718, Invalid=1934, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 10:35:09,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2020-12-22 10:35:09,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 93. [2020-12-22 10:35:09,682 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:09,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:09,683 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:09,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:09,683 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:09,683 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:09,683 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:09,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:09,683 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:09,684 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:09,884 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:09,884 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:09,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:09,885 INFO L82 PathProgramCache]: Analyzing trace with hash 1323856894, now seen corresponding path program 106 times [2020-12-22 10:35:09,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:09,886 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1682154868] [2020-12-22 10:35:09,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:09,893 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:10,158 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:10,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1682154868] [2020-12-22 10:35:10,159 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [694173402] [2020-12-22 10:35:10,159 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 [2020-12-22 10:35:10,240 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:35:10,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:10,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:10,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:10,297 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:10,298 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:10,298 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:35:10,298 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342698094] [2020-12-22 10:35:10,298 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:10,299 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:10,299 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:10,299 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=411, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:10,299 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:11,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:11,305 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-12-22 10:35:11,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:35:11,306 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:11,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:11,307 INFO L225 Difference]: With dead ends: 134 [2020-12-22 10:35:11,307 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 10:35:11,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 679 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=804, Invalid=2058, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 10:35:11,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 10:35:11,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 93. [2020-12-22 10:35:11,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:11,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:11,310 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:11,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:11,311 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:11,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:11,311 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:11,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:11,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:11,311 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:11,524 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:11,524 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:11,525 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:11,525 INFO L82 PathProgramCache]: Analyzing trace with hash 1237766774, now seen corresponding path program 107 times [2020-12-22 10:35:11,525 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:11,526 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [519395495] [2020-12-22 10:35:11,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:11,533 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:11,790 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:11,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [519395495] [2020-12-22 10:35:11,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [363759837] [2020-12-22 10:35:11,791 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 [2020-12-22 10:35:11,868 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 10:35:11,868 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:11,869 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:11,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:11,931 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:11,931 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:35:11,931 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [759368377] [2020-12-22 10:35:11,932 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:11,932 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:11,932 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:11,932 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=402, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:11,933 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:13,023 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:13,023 INFO L93 Difference]: Finished difference Result 128 states and 303 transitions. [2020-12-22 10:35:13,024 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 10:35:13,024 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:13,024 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:13,024 INFO L225 Difference]: With dead ends: 128 [2020-12-22 10:35:13,024 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 10:35:13,025 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 760 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=906, Invalid=2174, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 10:35:13,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 10:35:13,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 93. [2020-12-22 10:35:13,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:35:13,027 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 233 transitions. [2020-12-22 10:35:13,027 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 233 transitions. Word has length 26 [2020-12-22 10:35:13,027 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:13,027 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 233 transitions. [2020-12-22 10:35:13,027 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:13,027 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 233 transitions. [2020-12-22 10:35:13,028 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:13,028 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:13,028 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:13,228 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable109 [2020-12-22 10:35:13,228 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:13,229 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:13,229 INFO L82 PathProgramCache]: Analyzing trace with hash 1260049698, now seen corresponding path program 108 times [2020-12-22 10:35:13,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:13,230 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1780004683] [2020-12-22 10:35:13,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:13,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:13,482 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:35:13,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1780004683] [2020-12-22 10:35:13,483 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1055790461] [2020-12-22 10:35:13,483 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 [2020-12-22 10:35:13,565 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 10:35:13,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:13,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 10:35:13,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:13,640 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:35:13,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:13,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-12-22 10:35:13,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1500948449] [2020-12-22 10:35:13,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:35:13,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:13,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:35:13,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:35:13,641 INFO L87 Difference]: Start difference. First operand 93 states and 233 transitions. Second operand 23 states. [2020-12-22 10:35:14,948 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:14,948 INFO L93 Difference]: Finished difference Result 144 states and 345 transitions. [2020-12-22 10:35:14,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-12-22 10:35:14,949 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 26 [2020-12-22 10:35:14,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:14,950 INFO L225 Difference]: With dead ends: 144 [2020-12-22 10:35:14,950 INFO L226 Difference]: Without dead ends: 133 [2020-12-22 10:35:14,951 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 80 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 57 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 861 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=958, Invalid=2464, Unknown=0, NotChecked=0, Total=3422 [2020-12-22 10:35:14,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 133 states. [2020-12-22 10:35:14,953 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 133 to 78. [2020-12-22 10:35:14,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 10:35:14,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 190 transitions. [2020-12-22 10:35:14,953 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 190 transitions. Word has length 26 [2020-12-22 10:35:14,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:14,954 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 190 transitions. [2020-12-22 10:35:14,954 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:35:14,954 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 190 transitions. [2020-12-22 10:35:14,954 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:14,954 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:14,954 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:15,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,106 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:15,156 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:15,157 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:15,157 INFO L82 PathProgramCache]: Analyzing trace with hash 159167202, now seen corresponding path program 109 times [2020-12-22 10:35:15,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:15,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1888237182] [2020-12-22 10:35:15,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:15,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:15,413 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:35:15,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1888237182] [2020-12-22 10:35:15,414 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1877017214] [2020-12-22 10:35:15,414 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 [2020-12-22 10:35:15,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:15,488 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:35:15,489 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:15,536 INFO L134 CoverageAnalysis]: Checked inductivity of 73 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:35:15,536 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:15,537 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-12-22 10:35:15,537 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1118447792] [2020-12-22 10:35:15,537 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:35:15,537 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:15,538 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:35:15,538 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=107, Invalid=355, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:35:15,538 INFO L87 Difference]: Start difference. First operand 78 states and 190 transitions. Second operand 22 states. [2020-12-22 10:35:16,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:16,585 INFO L93 Difference]: Finished difference Result 169 states and 397 transitions. [2020-12-22 10:35:16,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 10:35:16,586 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 26 [2020-12-22 10:35:16,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:16,587 INFO L225 Difference]: With dead ends: 169 [2020-12-22 10:35:16,587 INFO L226 Difference]: Without dead ends: 161 [2020-12-22 10:35:16,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 888 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1007, Invalid=2185, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 10:35:16,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-12-22 10:35:16,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 99. [2020-12-22 10:35:16,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 10:35:16,590 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 255 transitions. [2020-12-22 10:35:16,590 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 255 transitions. Word has length 26 [2020-12-22 10:35:16,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:16,591 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 255 transitions. [2020-12-22 10:35:16,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:35:16,591 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 255 transitions. [2020-12-22 10:35:16,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:35:16,591 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:16,591 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:16,804 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:16,805 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:16,805 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:16,805 INFO L82 PathProgramCache]: Analyzing trace with hash 159885286, now seen corresponding path program 110 times [2020-12-22 10:35:16,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:16,806 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1155578500] [2020-12-22 10:35:16,806 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:16,813 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:17,076 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:17,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1155578500] [2020-12-22 10:35:17,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [336836003] [2020-12-22 10:35:17,077 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 [2020-12-22 10:35:17,152 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:35:17,152 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:17,153 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:17,154 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:17,212 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:35:17,241 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:17,241 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:17,241 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-22 10:35:17,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1079484048] [2020-12-22 10:35:17,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 10:35:17,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:17,242 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 10:35:17,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:35:17,243 INFO L87 Difference]: Start difference. First operand 99 states and 255 transitions. Second operand 24 states. [2020-12-22 10:35:18,739 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:18,739 INFO L93 Difference]: Finished difference Result 169 states and 399 transitions. [2020-12-22 10:35:18,740 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 10:35:18,740 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 10:35:18,740 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:18,741 INFO L225 Difference]: With dead ends: 169 [2020-12-22 10:35:18,741 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 10:35:18,742 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1197, Invalid=2585, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 10:35:18,742 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 10:35:18,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 108. [2020-12-22 10:35:18,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 10:35:18,745 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 265 transitions. [2020-12-22 10:35:18,745 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 265 transitions. Word has length 26 [2020-12-22 10:35:18,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:18,745 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 265 transitions. [2020-12-22 10:35:18,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 10:35:18,745 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 265 transitions. [2020-12-22 10:35:18,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:35:18,746 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:18,746 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:18,954 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-12-22 10:35:18,955 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:18,955 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:18,955 INFO L82 PathProgramCache]: Analyzing trace with hash 406024247, now seen corresponding path program 111 times [2020-12-22 10:35:18,956 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:18,956 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174940559] [2020-12-22 10:35:18,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:18,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:19,231 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:35:19,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174940559] [2020-12-22 10:35:19,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [447918975] [2020-12-22 10:35:19,231 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 [2020-12-22 10:35:19,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 10:35:19,316 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:19,317 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:35:19,318 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:19,353 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 80 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:35:19,354 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:19,354 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:35:19,354 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [167491878] [2020-12-22 10:35:19,354 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:35:19,354 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:19,354 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:35:19,354 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:35:19,355 INFO L87 Difference]: Start difference. First operand 108 states and 265 transitions. Second operand 22 states. [2020-12-22 10:35:20,501 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:20,502 INFO L93 Difference]: Finished difference Result 172 states and 405 transitions. [2020-12-22 10:35:20,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 10:35:20,503 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:35:20,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:20,503 INFO L225 Difference]: With dead ends: 172 [2020-12-22 10:35:20,503 INFO L226 Difference]: Without dead ends: 164 [2020-12-22 10:35:20,504 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 10:35:20,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-22 10:35:20,507 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 115. [2020-12-22 10:35:20,507 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 10:35:20,507 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 289 transitions. [2020-12-22 10:35:20,507 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 289 transitions. Word has length 27 [2020-12-22 10:35:20,508 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:20,508 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 289 transitions. [2020-12-22 10:35:20,508 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:35:20,508 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 289 transitions. [2020-12-22 10:35:20,508 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:35:20,508 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:20,508 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:20,721 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 109 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable113 [2020-12-22 10:35:20,722 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:20,722 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:20,722 INFO L82 PathProgramCache]: Analyzing trace with hash 406742331, now seen corresponding path program 112 times [2020-12-22 10:35:20,723 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:20,723 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [902159146] [2020-12-22 10:35:20,723 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:20,730 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:21,017 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:21,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [902159146] [2020-12-22 10:35:21,017 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [6934657] [2020-12-22 10:35:21,017 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 [2020-12-22 10:35:21,098 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:35:21,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:21,099 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:35:21,100 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:21,163 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:35:21,185 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:21,186 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:21,187 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 23 [2020-12-22 10:35:21,187 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66408720] [2020-12-22 10:35:21,187 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-12-22 10:35:21,187 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:21,188 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-12-22 10:35:21,188 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:35:21,188 INFO L87 Difference]: Start difference. First operand 115 states and 289 transitions. Second operand 25 states. [2020-12-22 10:35:22,742 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:22,742 INFO L93 Difference]: Finished difference Result 167 states and 396 transitions. [2020-12-22 10:35:22,743 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 10:35:22,743 INFO L78 Accepts]: Start accepts. Automaton has 25 states. Word has length 27 [2020-12-22 10:35:22,743 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:22,744 INFO L225 Difference]: With dead ends: 167 [2020-12-22 10:35:22,744 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 10:35:22,744 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 85 GetRequests, 24 SyntacticMatches, 0 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 999 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=1215, Invalid=2691, Unknown=0, NotChecked=0, Total=3906 [2020-12-22 10:35:22,745 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 10:35:22,746 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 99. [2020-12-22 10:35:22,746 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-12-22 10:35:22,747 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 234 transitions. [2020-12-22 10:35:22,747 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 234 transitions. Word has length 27 [2020-12-22 10:35:22,747 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:22,747 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 234 transitions. [2020-12-22 10:35:22,747 INFO L482 AbstractCegarLoop]: Interpolant automaton has 25 states. [2020-12-22 10:35:22,748 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 234 transitions. [2020-12-22 10:35:22,748 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 10:35:22,748 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:22,748 INFO L422 BasicCegarLoop]: trace histogram [11, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:22,962 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-12-22 10:35:22,963 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:22,963 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:22,963 INFO L82 PathProgramCache]: Analyzing trace with hash -1305995578, now seen corresponding path program 113 times [2020-12-22 10:35:22,964 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:22,964 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707966512] [2020-12-22 10:35:22,964 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:22,972 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:23,093 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 81 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:23,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707966512] [2020-12-22 10:35:23,094 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1514380961] [2020-12-22 10:35:23,094 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 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 [2020-12-22 10:35:23,178 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-12-22 10:35:23,178 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:23,179 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:35:23,180 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:23,226 INFO L134 CoverageAnalysis]: Checked inductivity of 91 backedges. 91 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:23,226 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:35:23,226 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-12-22 10:35:23,226 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1806824109] [2020-12-22 10:35:23,227 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:35:23,227 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:23,227 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:35:23,227 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:35:23,227 INFO L87 Difference]: Start difference. First operand 99 states and 234 transitions. Second operand 13 states. [2020-12-22 10:35:23,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:23,255 INFO L93 Difference]: Finished difference Result 416 states and 914 transitions. [2020-12-22 10:35:23,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:35:23,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 28 [2020-12-22 10:35:23,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:23,257 INFO L225 Difference]: With dead ends: 416 [2020-12-22 10:35:23,257 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 10:35:23,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:35:23,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 10:35:23,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-22 10:35:23,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 10:35:23,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 75 transitions. [2020-12-22 10:35:23,258 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 75 transitions. Word has length 28 [2020-12-22 10:35:23,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:23,259 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 75 transitions. [2020-12-22 10:35:23,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:35:23,259 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 75 transitions. [2020-12-22 10:35:23,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 10:35:23,259 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:23,259 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:23,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:23,475 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:23,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:23,475 INFO L82 PathProgramCache]: Analyzing trace with hash -968333302, now seen corresponding path program 114 times [2020-12-22 10:35:23,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:23,476 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1956629675] [2020-12-22 10:35:23,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:23,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:23,776 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:23,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1956629675] [2020-12-22 10:35:23,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [359487033] [2020-12-22 10:35:23,777 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 [2020-12-22 10:35:23,873 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-12-22 10:35:23,873 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:23,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 180 conjuncts, 27 conjunts are in the unsatisfiable core [2020-12-22 10:35:23,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:23,963 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:23,963 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:23,963 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 24 [2020-12-22 10:35:23,963 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655904525] [2020-12-22 10:35:23,964 INFO L461 AbstractCegarLoop]: Interpolant automaton has 26 states [2020-12-22 10:35:23,964 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:23,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 26 interpolants. [2020-12-22 10:35:23,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=143, Invalid=507, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:35:23,965 INFO L87 Difference]: Start difference. First operand 43 states and 75 transitions. Second operand 26 states. [2020-12-22 10:35:24,685 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:24,685 INFO L93 Difference]: Finished difference Result 75 states and 129 transitions. [2020-12-22 10:35:24,686 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:35:24,686 INFO L78 Accepts]: Start accepts. Automaton has 26 states. Word has length 28 [2020-12-22 10:35:24,686 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:24,686 INFO L225 Difference]: With dead ends: 75 [2020-12-22 10:35:24,687 INFO L226 Difference]: Without dead ends: 46 [2020-12-22 10:35:24,687 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 411 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=583, Invalid=1579, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 10:35:24,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 46 states. [2020-12-22 10:35:24,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 46 to 46. [2020-12-22 10:35:24,688 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 10:35:24,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 80 transitions. [2020-12-22 10:35:24,689 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 80 transitions. Word has length 28 [2020-12-22 10:35:24,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:24,689 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 80 transitions. [2020-12-22 10:35:24,689 INFO L482 AbstractCegarLoop]: Interpolant automaton has 26 states. [2020-12-22 10:35:24,689 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 80 transitions. [2020-12-22 10:35:24,689 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-12-22 10:35:24,689 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:24,689 INFO L422 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:24,889 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-12-22 10:35:24,890 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:24,890 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:24,891 INFO L82 PathProgramCache]: Analyzing trace with hash 38085663, now seen corresponding path program 115 times [2020-12-22 10:35:24,891 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:24,891 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540463674] [2020-12-22 10:35:24,891 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:24,903 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:25,029 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 90 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:25,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540463674] [2020-12-22 10:35:25,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1132478856] [2020-12-22 10:35:25,030 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 [2020-12-22 10:35:25,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:25,106 INFO L263 TraceCheckSpWp]: Trace formula consists of 185 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:35:25,106 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:25,142 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:35:25,142 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-12-22 10:35:25,142 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 14 [2020-12-22 10:35:25,142 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694401425] [2020-12-22 10:35:25,143 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:35:25,143 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:25,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:35:25,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:35:25,143 INFO L87 Difference]: Start difference. First operand 46 states and 80 transitions. Second operand 13 states. [2020-12-22 10:35:25,169 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:25,170 INFO L93 Difference]: Finished difference Result 151 states and 219 transitions. [2020-12-22 10:35:25,170 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:35:25,170 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 29 [2020-12-22 10:35:25,171 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:25,171 INFO L225 Difference]: With dead ends: 151 [2020-12-22 10:35:25,171 INFO L226 Difference]: Without dead ends: 0 [2020-12-22 10:35:25,171 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 29 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=101, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:35:25,171 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-12-22 10:35:25,171 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-12-22 10:35:25,172 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 0 states. [2020-12-22 10:35:25,172 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-12-22 10:35:25,172 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-12-22 10:35:25,172 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:25,172 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-12-22 10:35:25,172 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:35:25,172 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-12-22 10:35:25,172 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-12-22 10:35:25,372 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 113 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable117 [2020-12-22 10:35:25,377 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 10:35:25 BasicIcfg [2020-12-22 10:35:25,377 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 10:35:25,378 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 10:35:25,378 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 10:35:25,378 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 10:35:25,379 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:33:16" (3/4) ... [2020-12-22 10:35:25,382 INFO L137 WitnessPrinter]: Generating witness for correct program [2020-12-22 10:35:25,390 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t1 [2020-12-22 10:35:25,390 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure t2 [2020-12-22 10:35:25,398 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 12 nodes and edges [2020-12-22 10:35:25,399 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 4 nodes and edges [2020-12-22 10:35:25,399 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2020-12-22 10:35:25,399 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2020-12-22 10:35:25,433 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/pthread/triangular-longer-1.i-witness.graphml [2020-12-22 10:35:25,434 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 10:35:25,435 INFO L168 Benchmark]: Toolchain (without parser) took 130538.54 ms. Allocated memory was 169.9 MB in the beginning and 377.5 MB in the end (delta: 207.6 MB). Free memory was 143.6 MB in the beginning and 216.6 MB in the end (delta: -73.1 MB). Peak memory consumption was 135.3 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:25,435 INFO L168 Benchmark]: CDTParser took 0.22 ms. Allocated memory is still 169.9 MB. Free memory is still 142.8 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 10:35:25,435 INFO L168 Benchmark]: CACSL2BoogieTranslator took 790.00 ms. Allocated memory is still 169.9 MB. Free memory was 143.3 MB in the beginning and 113.9 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:25,436 INFO L168 Benchmark]: Boogie Procedure Inliner took 87.33 ms. Allocated memory is still 169.9 MB. Free memory was 113.9 MB in the beginning and 112.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:25,436 INFO L168 Benchmark]: Boogie Preprocessor took 67.40 ms. Allocated memory is still 169.9 MB. Free memory was 112.1 MB in the beginning and 110.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:25,436 INFO L168 Benchmark]: RCFGBuilder took 593.61 ms. Allocated memory is still 169.9 MB. Free memory was 110.6 MB in the beginning and 90.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:25,437 INFO L168 Benchmark]: TraceAbstraction took 128931.87 ms. Allocated memory was 169.9 MB in the beginning and 377.5 MB in the end (delta: 207.6 MB). Free memory was 89.8 MB in the beginning and 218.7 MB in the end (delta: -128.9 MB). Peak memory consumption was 79.7 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:25,437 INFO L168 Benchmark]: Witness Printer took 55.51 ms. Allocated memory is still 377.5 MB. Free memory was 218.7 MB in the beginning and 216.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:25,439 INFO L339 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 169.9 MB. Free memory is still 142.8 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 790.00 ms. Allocated memory is still 169.9 MB. Free memory was 143.3 MB in the beginning and 113.9 MB in the end (delta: 29.4 MB). Peak memory consumption was 29.4 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 87.33 ms. Allocated memory is still 169.9 MB. Free memory was 113.9 MB in the beginning and 112.1 MB in the end (delta: 1.8 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 67.40 ms. Allocated memory is still 169.9 MB. Free memory was 112.1 MB in the beginning and 110.6 MB in the end (delta: 1.5 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 593.61 ms. Allocated memory is still 169.9 MB. Free memory was 110.6 MB in the beginning and 90.3 MB in the end (delta: 20.2 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 128931.87 ms. Allocated memory was 169.9 MB in the beginning and 377.5 MB in the end (delta: 207.6 MB). Free memory was 89.8 MB in the beginning and 218.7 MB in the end (delta: -128.9 MB). Peak memory consumption was 79.7 MB. Max. memory is 8.0 GB. * Witness Printer took 55.51 ms. Allocated memory is still 377.5 MB. Free memory was 218.7 MB in the beginning and 216.6 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 645 VarBasedMoverChecksPositive, 20 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 20 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.3s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.5s, 62 PlacesBefore, 20 PlacesAfterwards, 60 TransitionsBefore, 16 TransitionsAfterwards, 968 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 25 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 2 ChoiceCompositions, 52 TotalNumberOfCompositions, 998 MoverChecksTotal - PositiveResult [Line: 722]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 128.8s, OverallIterations: 118, TraceHistogramMax: 11, AutomataDifference: 64.5s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.6s, HoareTripleCheckerStatistics: 1771 SDtfs, 6303 SDslu, 10215 SDs, 0 SdLazy, 11420 SolverSat, 7040 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 13.3s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5985 GetRequests, 2088 SyntacticMatches, 0 SemanticMatches, 3897 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35672 ImplicationChecksByTransitivity, 63.7s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=114, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.4s AutomataMinimizationTime, 118 MinimizatonAttempts, 3547 StatesRemovedByMinimization, 115 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.3s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 25.4s InterpolantComputationTime, 4618 NumberOfCodeBlocks, 4618 NumberOfCodeBlocksAsserted, 568 NumberOfCheckSat, 4388 ConstructedInterpolants, 0 QuantifiedInterpolants, 391868 SizeOfPredicates, 1359 NumberOfNonLiveVariables, 15895 ConjunctsInSsa, 2062 ConjunctsInUnsatCore, 230 InterpolantComputations, 8 PerfectInterpolantSequences, 376/8420 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...