/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-2.i -------------------------------------------------------------------------------- This is Ultimate 0.2.1-dev-4f750a8 [2020-12-22 10:33:14,695 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-12-22 10:33:14,699 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-12-22 10:33:14,737 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-12-22 10:33:14,738 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-12-22 10:33:14,740 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-12-22 10:33:14,742 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-12-22 10:33:14,745 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-12-22 10:33:14,747 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-12-22 10:33:14,749 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-12-22 10:33:14,750 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-12-22 10:33:14,752 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-12-22 10:33:14,753 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-12-22 10:33:14,754 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-12-22 10:33:14,756 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-12-22 10:33:14,757 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-12-22 10:33:14,759 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-12-22 10:33:14,773 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-12-22 10:33:14,781 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-12-22 10:33:14,784 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-12-22 10:33:14,786 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-12-22 10:33:14,787 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-12-22 10:33:14,789 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-12-22 10:33:14,790 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-12-22 10:33:14,794 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-12-22 10:33:14,794 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-12-22 10:33:14,795 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-12-22 10:33:14,796 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-12-22 10:33:14,797 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-12-22 10:33:14,798 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-12-22 10:33:14,798 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-12-22 10:33:14,799 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-12-22 10:33:14,800 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-12-22 10:33:14,801 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-12-22 10:33:14,802 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-12-22 10:33:14,803 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-12-22 10:33:14,804 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-12-22 10:33:14,804 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-12-22 10:33:14,805 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-12-22 10:33:14,806 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-12-22 10:33:14,807 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-12-22 10:33:14,808 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-64bit-Automizer_Default.epf [2020-12-22 10:33:14,836 INFO L113 SettingsManager]: Loading preferences was successful [2020-12-22 10:33:14,837 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-12-22 10:33:14,838 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-12-22 10:33:14,838 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-12-22 10:33:14,839 INFO L138 SettingsManager]: * Use SBE=true [2020-12-22 10:33:14,839 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-12-22 10:33:14,839 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-12-22 10:33:14,839 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-12-22 10:33:14,840 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-12-22 10:33:14,840 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-12-22 10:33:14,840 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-12-22 10:33:14,840 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-12-22 10:33:14,840 INFO L138 SettingsManager]: * Use constant arrays=true [2020-12-22 10:33:14,841 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-12-22 10:33:14,841 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-12-22 10:33:14,841 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-12-22 10:33:14,841 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-12-22 10:33:14,842 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-12-22 10:33:14,842 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-12-22 10:33:14,842 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-12-22 10:33:14,842 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-12-22 10:33:14,843 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-12-22 10:33:14,843 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-12-22 10:33:14,843 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-12-22 10:33:14,843 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-12-22 10:33:14,843 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-12-22 10:33:15,245 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-12-22 10:33:15,291 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-12-22 10:33:15,295 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-12-22 10:33:15,297 INFO L271 PluginConnector]: Initializing CDTParser... [2020-12-22 10:33:15,298 INFO L275 PluginConnector]: CDTParser initialized [2020-12-22 10:33:15,299 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/pthread/triangular-longer-2.i [2020-12-22 10:33:15,396 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cdecfe28/6c5ea2f3f4b441fd87c01db48ca4222d/FLAG0d67cca5c [2020-12-22 10:33:16,224 INFO L306 CDTParser]: Found 1 translation units. [2020-12-22 10:33:16,225 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/releaseScripts/default/sv-benchmarks/c/pthread/triangular-longer-2.i [2020-12-22 10:33:16,258 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cdecfe28/6c5ea2f3f4b441fd87c01db48ca4222d/FLAG0d67cca5c [2020-12-22 10:33:16,424 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/5cdecfe28/6c5ea2f3f4b441fd87c01db48ca4222d [2020-12-22 10:33:16,427 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-12-22 10:33:16,429 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2020-12-22 10:33:16,431 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-12-22 10:33:16,432 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-12-22 10:33:16,438 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-12-22 10:33:16,439 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:33:16" (1/1) ... [2020-12-22 10:33:16,441 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@5e2d32b2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:16, skipping insertion in model container [2020-12-22 10:33:16,444 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 22.12 10:33:16" (1/1) ... [2020-12-22 10:33:16,456 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-12-22 10:33:16,529 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-12-22 10:33:16,922 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-2.i[30963,30976] [2020-12-22 10:33:16,927 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:33:16,940 INFO L203 MainTranslator]: Completed pre-run [2020-12-22 10:33:17,031 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-2.i[30963,30976] [2020-12-22 10:33:17,036 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-12-22 10:33:17,139 INFO L208 MainTranslator]: Completed translation [2020-12-22 10:33:17,140 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17 WrapperNode [2020-12-22 10:33:17,140 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-12-22 10:33:17,141 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-12-22 10:33:17,142 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-12-22 10:33:17,142 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-12-22 10:33:17,150 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,167 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,189 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-12-22 10:33:17,189 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-12-22 10:33:17,190 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-12-22 10:33:17,190 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-12-22 10:33:17,199 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,200 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,203 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,204 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,210 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,214 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,217 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (1/1) ... [2020-12-22 10:33:17,220 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-12-22 10:33:17,221 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-12-22 10:33:17,221 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-12-22 10:33:17,222 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-12-22 10:33:17,223 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (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 10:33:17,344 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-12-22 10:33:17,345 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-12-22 10:33:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-12-22 10:33:17,346 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-12-22 10:33:17,346 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-12-22 10:33:17,347 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-12-22 10:33:17,347 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-12-22 10:33:17,348 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-12-22 10:33:17,348 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-12-22 10:33:17,349 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-12-22 10:33:17,349 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-12-22 10:33:17,350 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-12-22 10:33:17,352 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 10:33:17,770 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-12-22 10:33:17,770 INFO L299 CfgBuilder]: Removed 6 assume(true) statements. [2020-12-22 10:33:17,773 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:33:17 BoogieIcfgContainer [2020-12-22 10:33:17,773 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-12-22 10:33:17,775 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-12-22 10:33:17,775 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-12-22 10:33:17,778 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-12-22 10:33:17,779 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 22.12 10:33:16" (1/3) ... [2020-12-22 10:33:17,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c657af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:33:17, skipping insertion in model container [2020-12-22 10:33:17,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 22.12 10:33:17" (2/3) ... [2020-12-22 10:33:17,780 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@2c657af0 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 22.12 10:33:17, skipping insertion in model container [2020-12-22 10:33:17,780 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:33:17" (3/3) ... [2020-12-22 10:33:17,782 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-2.i [2020-12-22 10:33:17,790 WARN L142 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-12-22 10:33:17,790 INFO L153 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-12-22 10:33:17,795 INFO L165 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-12-22 10:33:17,796 INFO L323 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-12-22 10:33:17,835 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,838 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,839 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,839 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,840 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,840 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,843 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,844 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,844 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,844 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,845 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,845 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,845 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,845 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,845 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,846 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,846 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,846 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,846 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,850 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,851 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,851 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,852 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,852 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,853 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,854 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,854 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,854 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,854 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,855 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,855 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,855 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,855 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,856 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,858 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,859 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,860 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,861 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,861 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,862 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,862 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,862 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,863 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,863 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,863 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,863 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,864 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,869 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,869 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,869 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,870 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,870 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,870 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,881 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,881 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-12-22 10:33:17,885 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-12-22 10:33:17,911 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-12-22 10:33:17,959 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-12-22 10:33:17,959 INFO L378 AbstractCegarLoop]: Hoare is true [2020-12-22 10:33:17,960 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-12-22 10:33:17,960 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-12-22 10:33:17,961 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-12-22 10:33:17,961 INFO L382 AbstractCegarLoop]: Difference is false [2020-12-22 10:33:17,961 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-12-22 10:33:17,961 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-12-22 10:33:17,984 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-12-22 10:33:17,988 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-22 10:33:17,992 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 62 places, 60 transitions, 130 flow [2020-12-22 10:33:17,995 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 62 places, 60 transitions, 130 flow [2020-12-22 10:33:18,091 INFO L129 PetriNetUnfolder]: 5/58 cut-off events. [2020-12-22 10:33:18,092 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-12-22 10:33:18,097 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 10:33:18,100 INFO L116 LiptonReduction]: Number of co-enabled transitions 968 [2020-12-22 10:33:19,991 WARN L197 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 54 DAG size of output: 52 [2020-12-22 10:33:20,694 WARN L197 SmtUtils]: Spent 262.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 10:33:20,823 WARN L197 SmtUtils]: Spent 127.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 10:33:21,079 WARN L197 SmtUtils]: Spent 254.00 ms on a formula simplification. DAG size of input: 93 DAG size of output: 89 [2020-12-22 10:33:21,190 WARN L197 SmtUtils]: Spent 105.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-12-22 10:33:21,220 INFO L131 LiptonReduction]: Checked pairs total: 998 [2020-12-22 10:33:21,220 INFO L133 LiptonReduction]: Total number of compositions: 52 [2020-12-22 10:33:21,227 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-12-22 10:33:21,238 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-12-22 10:33:21,240 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-12-22 10:33:21,246 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-12-22 10:33:21,246 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:21,247 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-12-22 10:33:21,248 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:21,254 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:21,254 INFO L82 PathProgramCache]: Analyzing trace with hash -1332860337, now seen corresponding path program 1 times [2020-12-22 10:33:21,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:21,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [219293186] [2020-12-22 10:33:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:21,406 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:21,550 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 10:33:21,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [219293186] [2020-12-22 10:33:21,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:21,554 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-12-22 10:33:21,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1379069556] [2020-12-22 10:33:21,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-12-22 10:33:21,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:21,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-12-22 10:33:21,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-12-22 10:33:21,586 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-12-22 10:33:21,645 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:21,645 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-12-22 10:33:21,646 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:33:21,647 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-12-22 10:33:21,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:21,659 INFO L225 Difference]: With dead ends: 83 [2020-12-22 10:33:21,660 INFO L226 Difference]: Without dead ends: 54 [2020-12-22 10:33:21,661 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 10:33:21,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-12-22 10:33:21,699 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-12-22 10:33:21,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 10:33:21,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-12-22 10:33:21,704 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-12-22 10:33:21,705 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:21,705 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-12-22 10:33:21,705 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-12-22 10:33:21,705 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-12-22 10:33:21,706 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:33:21,706 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:21,707 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:21,707 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-12-22 10:33:21,707 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:21,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:21,708 INFO L82 PathProgramCache]: Analyzing trace with hash -978539367, now seen corresponding path program 1 times [2020-12-22 10:33:21,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:21,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [657149190] [2020-12-22 10:33:21,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:21,766 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:21,878 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 10:33:21,879 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [657149190] [2020-12-22 10:33:21,879 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:21,879 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:33:21,880 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [688316629] [2020-12-22 10:33:21,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:33:21,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:21,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:33:21,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:33:21,885 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-12-22 10:33:21,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:21,940 INFO L93 Difference]: Finished difference Result 86 states and 200 transitions. [2020-12-22 10:33:21,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-12-22 10:33:21,941 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:33:21,941 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:21,943 INFO L225 Difference]: With dead ends: 86 [2020-12-22 10:33:21,944 INFO L226 Difference]: Without dead ends: 78 [2020-12-22 10:33:21,944 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 10:33:21,946 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-12-22 10:33:21,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 56. [2020-12-22 10:33:21,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 56 states. [2020-12-22 10:33:21,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 137 transitions. [2020-12-22 10:33:21,956 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 137 transitions. Word has length 8 [2020-12-22 10:33:21,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:21,957 INFO L481 AbstractCegarLoop]: Abstraction has 56 states and 137 transitions. [2020-12-22 10:33:21,957 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:33:21,957 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 137 transitions. [2020-12-22 10:33:21,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:33:21,958 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:21,958 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:21,958 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-12-22 10:33:21,959 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:21,959 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:21,959 INFO L82 PathProgramCache]: Analyzing trace with hash -978459387, now seen corresponding path program 2 times [2020-12-22 10:33:21,960 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:21,960 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633054858] [2020-12-22 10:33:21,960 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:21,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:22,034 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 10:33:22,035 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633054858] [2020-12-22 10:33:22,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:22,035 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:33:22,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [177141652] [2020-12-22 10:33:22,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:33:22,036 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:22,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:33:22,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:33:22,037 INFO L87 Difference]: Start difference. First operand 56 states and 137 transitions. Second operand 5 states. [2020-12-22 10:33:22,082 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:22,082 INFO L93 Difference]: Finished difference Result 62 states and 143 transitions. [2020-12-22 10:33:22,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-12-22 10:33:22,083 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:33:22,083 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:22,084 INFO L225 Difference]: With dead ends: 62 [2020-12-22 10:33:22,084 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 10:33:22,085 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:33:22,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 10:33:22,090 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-22 10:33:22,091 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 10:33:22,092 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-12-22 10:33:22,092 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 8 [2020-12-22 10:33:22,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:22,093 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-12-22 10:33:22,093 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:33:22,093 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-12-22 10:33:22,096 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-12-22 10:33:22,096 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:22,097 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:22,097 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-12-22 10:33:22,097 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:22,098 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:22,098 INFO L82 PathProgramCache]: Analyzing trace with hash -978842826, now seen corresponding path program 1 times [2020-12-22 10:33:22,098 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:22,098 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666603271] [2020-12-22 10:33:22,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:22,125 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:22,175 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 10:33:22,176 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666603271] [2020-12-22 10:33:22,176 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:22,176 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-12-22 10:33:22,176 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896035177] [2020-12-22 10:33:22,177 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-12-22 10:33:22,177 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:22,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-12-22 10:33:22,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=7, Invalid=13, Unknown=0, NotChecked=0, Total=20 [2020-12-22 10:33:22,178 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand 5 states. [2020-12-22 10:33:22,222 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:22,222 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-12-22 10:33:22,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-12-22 10:33:22,223 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-12-22 10:33:22,223 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:22,224 INFO L225 Difference]: With dead ends: 56 [2020-12-22 10:33:22,224 INFO L226 Difference]: Without dead ends: 50 [2020-12-22 10:33:22,225 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:33:22,227 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-12-22 10:33:22,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-12-22 10:33:22,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 42 states. [2020-12-22 10:33:22,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-12-22 10:33:22,234 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-12-22 10:33:22,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:22,235 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-12-22 10:33:22,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-12-22 10:33:22,235 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-12-22 10:33:22,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:33:22,236 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:22,236 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:22,237 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-12-22 10:33:22,237 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:22,237 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:22,237 INFO L82 PathProgramCache]: Analyzing trace with hash 220478720, now seen corresponding path program 1 times [2020-12-22 10:33:22,238 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:22,238 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1415960578] [2020-12-22 10:33:22,238 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:22,261 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:22,366 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 10:33:22,367 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1415960578] [2020-12-22 10:33:22,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:22,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:33:22,368 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617190962] [2020-12-22 10:33:22,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:33:22,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:22,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:33:22,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:33:22,373 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand 6 states. [2020-12-22 10:33:22,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:22,454 INFO L93 Difference]: Finished difference Result 58 states and 132 transitions. [2020-12-22 10:33:22,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:33:22,455 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:33:22,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:22,456 INFO L225 Difference]: With dead ends: 58 [2020-12-22 10:33:22,457 INFO L226 Difference]: Without dead ends: 51 [2020-12-22 10:33:22,457 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 10:33:22,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-12-22 10:33:22,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 45. [2020-12-22 10:33:22,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 45 states. [2020-12-22 10:33:22,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 107 transitions. [2020-12-22 10:33:22,465 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 107 transitions. Word has length 10 [2020-12-22 10:33:22,465 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:22,465 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 107 transitions. [2020-12-22 10:33:22,465 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:33:22,465 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 107 transitions. [2020-12-22 10:33:22,466 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:33:22,466 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:22,467 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:22,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-12-22 10:33:22,467 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:22,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:22,468 INFO L82 PathProgramCache]: Analyzing trace with hash 266866190, now seen corresponding path program 2 times [2020-12-22 10:33:22,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:22,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006162993] [2020-12-22 10:33:22,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:22,488 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:22,546 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 10:33:22,546 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006162993] [2020-12-22 10:33:22,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:22,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:33:22,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1205579736] [2020-12-22 10:33:22,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:33:22,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:22,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:33:22,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:33:22,549 INFO L87 Difference]: Start difference. First operand 45 states and 107 transitions. Second operand 6 states. [2020-12-22 10:33:22,617 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:22,618 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-12-22 10:33:22,618 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:33:22,618 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:33:22,619 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:22,620 INFO L225 Difference]: With dead ends: 78 [2020-12-22 10:33:22,620 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 10:33:22,621 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 10:33:22,622 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 10:33:22,627 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-12-22 10:33:22,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 46 states. [2020-12-22 10:33:22,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-12-22 10:33:22,628 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-12-22 10:33:22,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:22,629 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-12-22 10:33:22,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:33:22,629 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-12-22 10:33:22,630 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:33:22,630 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:22,630 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:22,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-12-22 10:33:22,631 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:22,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:22,632 INFO L82 PathProgramCache]: Analyzing trace with hash 266888510, now seen corresponding path program 3 times [2020-12-22 10:33:22,632 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:22,632 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [60051809] [2020-12-22 10:33:22,633 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:22,651 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:22,703 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 10:33:22,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [60051809] [2020-12-22 10:33:22,704 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:22,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:33:22,705 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2089130139] [2020-12-22 10:33:22,705 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:33:22,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:22,706 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:33:22,706 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:33:22,707 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand 6 states. [2020-12-22 10:33:22,797 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:22,798 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-12-22 10:33:22,798 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-12-22 10:33:22,798 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:33:22,798 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:22,801 INFO L225 Difference]: With dead ends: 54 [2020-12-22 10:33:22,801 INFO L226 Difference]: Without dead ends: 43 [2020-12-22 10:33:22,802 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 10:33:22,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-12-22 10:33:22,813 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-12-22 10:33:22,813 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 34 states. [2020-12-22 10:33:22,817 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-12-22 10:33:22,818 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-12-22 10:33:22,818 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:22,818 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-12-22 10:33:22,818 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:33:22,820 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-12-22 10:33:22,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-12-22 10:33:22,824 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:22,824 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:22,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-12-22 10:33:22,825 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:22,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:22,831 INFO L82 PathProgramCache]: Analyzing trace with hash 266773190, now seen corresponding path program 4 times [2020-12-22 10:33:22,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:22,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1226655558] [2020-12-22 10:33:22,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:22,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:22,937 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 10:33:22,938 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1226655558] [2020-12-22 10:33:22,939 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-12-22 10:33:22,939 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-12-22 10:33:22,939 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1893081433] [2020-12-22 10:33:22,940 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-12-22 10:33:22,940 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:22,940 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-12-22 10:33:22,941 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=21, Unknown=0, NotChecked=0, Total=30 [2020-12-22 10:33:22,941 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand 6 states. [2020-12-22 10:33:23,067 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:23,068 INFO L93 Difference]: Finished difference Result 55 states and 129 transitions. [2020-12-22 10:33:23,068 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-12-22 10:33:23,068 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-12-22 10:33:23,069 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:23,069 INFO L225 Difference]: With dead ends: 55 [2020-12-22 10:33:23,070 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 10:33:23,070 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 10 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=47, Invalid=85, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:23,071 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 10:33:23,074 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 40. [2020-12-22 10:33:23,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 40 states. [2020-12-22 10:33:23,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-12-22 10:33:23,075 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-12-22 10:33:23,075 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:23,075 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-12-22 10:33:23,075 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-12-22 10:33:23,076 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-12-22 10:33:23,076 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:33:23,076 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:23,076 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:23,077 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2020-12-22 10:33:23,077 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:23,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:23,078 INFO L82 PathProgramCache]: Analyzing trace with hash -1755209235, now seen corresponding path program 5 times [2020-12-22 10:33:23,078 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:23,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [702826295] [2020-12-22 10:33:23,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:23,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:23,203 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 10:33:23,204 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [702826295] [2020-12-22 10:33:23,206 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7878986] [2020-12-22 10:33:23,207 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 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 10:33:23,277 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:23,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:23,279 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:33:23,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:23,412 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 10:33:23,412 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:23,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-12-22 10:33:23,415 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [645861516] [2020-12-22 10:33:23,416 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:33:23,416 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:23,420 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:33:23,421 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:33:23,421 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand 7 states. [2020-12-22 10:33:23,532 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:23,532 INFO L93 Difference]: Finished difference Result 55 states and 127 transitions. [2020-12-22 10:33:23,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-12-22 10:33:23,533 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-12-22 10:33:23,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:23,533 INFO L225 Difference]: With dead ends: 55 [2020-12-22 10:33:23,534 INFO L226 Difference]: Without dead ends: 49 [2020-12-22 10:33:23,534 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:23,535 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-12-22 10:33:23,540 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 43. [2020-12-22 10:33:23,541 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 10:33:23,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-12-22 10:33:23,544 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 11 [2020-12-22 10:33:23,545 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:23,545 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-12-22 10:33:23,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:33:23,545 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-12-22 10:33:23,546 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-12-22 10:33:23,547 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:23,547 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:23,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable8 [2020-12-22 10:33:23,763 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:23,764 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:23,764 INFO L82 PathProgramCache]: Analyzing trace with hash -316364261, now seen corresponding path program 6 times [2020-12-22 10:33:23,765 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:23,765 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1164288603] [2020-12-22 10:33:23,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:23,779 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:23,866 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 10:33:23,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1164288603] [2020-12-22 10:33:23,867 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [857967054] [2020-12-22 10:33:23,867 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 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 10:33:23,933 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-12-22 10:33:23,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:23,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 95 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:33:23,938 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:23,980 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:33:23,997 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 10:33:23,997 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:23,997 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 7 [2020-12-22 10:33:23,998 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [827262035] [2020-12-22 10:33:23,998 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:33:23,998 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:23,999 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:33:23,999 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:33:23,999 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 9 states. [2020-12-22 10:33:24,118 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:24,119 INFO L93 Difference]: Finished difference Result 72 states and 169 transitions. [2020-12-22 10:33:24,119 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:33:24,119 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-12-22 10:33:24,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:24,120 INFO L225 Difference]: With dead ends: 72 [2020-12-22 10:33:24,120 INFO L226 Difference]: Without dead ends: 62 [2020-12-22 10:33:24,121 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:24,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 62 states. [2020-12-22 10:33:24,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 62 to 51. [2020-12-22 10:33:24,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 51 states. [2020-12-22 10:33:24,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 121 transitions. [2020-12-22 10:33:24,126 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 121 transitions. Word has length 11 [2020-12-22 10:33:24,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:24,127 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 121 transitions. [2020-12-22 10:33:24,127 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:33:24,127 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 121 transitions. [2020-12-22 10:33:24,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:33:24,128 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:24,128 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:24,342 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 3 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-12-22 10:33:24,343 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:24,344 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:24,344 INFO L82 PathProgramCache]: Analyzing trace with hash -1328990746, now seen corresponding path program 7 times [2020-12-22 10:33:24,344 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:24,345 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1555818962] [2020-12-22 10:33:24,345 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:24,377 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:24,440 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:24,440 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1555818962] [2020-12-22 10:33:24,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [113576566] [2020-12-22 10:33:24,441 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 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 10:33:24,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:24,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 9 conjunts are in the unsatisfiable core [2020-12-22 10:33:24,501 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:24,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:24,525 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:24,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-12-22 10:33:24,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461080435] [2020-12-22 10:33:24,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-12-22 10:33:24,526 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:24,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-12-22 10:33:24,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2020-12-22 10:33:24,527 INFO L87 Difference]: Start difference. First operand 51 states and 121 transitions. Second operand 7 states. [2020-12-22 10:33:24,652 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:24,652 INFO L93 Difference]: Finished difference Result 92 states and 215 transitions. [2020-12-22 10:33:24,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:33:24,653 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 12 [2020-12-22 10:33:24,654 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:24,654 INFO L225 Difference]: With dead ends: 92 [2020-12-22 10:33:24,654 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 10:33:24,655 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:24,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 10:33:24,676 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-12-22 10:33:24,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 10:33:24,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 143 transitions. [2020-12-22 10:33:24,677 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 143 transitions. Word has length 12 [2020-12-22 10:33:24,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:24,678 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 143 transitions. [2020-12-22 10:33:24,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-12-22 10:33:24,678 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 143 transitions. [2020-12-22 10:33:24,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-12-22 10:33:24,682 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:24,683 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:24,883 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 4 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2020-12-22 10:33:24,884 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:24,885 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:24,885 INFO L82 PathProgramCache]: Analyzing trace with hash -1328272662, now seen corresponding path program 8 times [2020-12-22 10:33:24,885 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:24,885 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2093574308] [2020-12-22 10:33:24,886 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:24,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:24,997 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 10:33:24,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2093574308] [2020-12-22 10:33:24,997 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [90258471] [2020-12-22 10:33:24,998 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 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 10:33:25,052 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:25,052 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:25,054 INFO L263 TraceCheckSpWp]: Trace formula consists of 100 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:33:25,056 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:25,091 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:33:25,105 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 10:33:25,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:25,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-22 10:33:25,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [515908730] [2020-12-22 10:33:25,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:25,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:25,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:25,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=67, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:25,107 INFO L87 Difference]: Start difference. First operand 57 states and 143 transitions. Second operand 10 states. [2020-12-22 10:33:25,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:25,306 INFO L93 Difference]: Finished difference Result 88 states and 209 transitions. [2020-12-22 10:33:25,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:33:25,306 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-12-22 10:33:25,307 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:25,307 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:25,307 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 10:33:25,308 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:33:25,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 10:33:25,311 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 43. [2020-12-22 10:33:25,311 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 43 states. [2020-12-22 10:33:25,311 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 103 transitions. [2020-12-22 10:33:25,312 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 103 transitions. Word has length 12 [2020-12-22 10:33:25,312 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:25,312 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 103 transitions. [2020-12-22 10:33:25,312 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:25,312 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 103 transitions. [2020-12-22 10:33:25,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:33:25,313 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:25,313 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:25,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:25,527 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:25,528 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:25,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1277025601, now seen corresponding path program 9 times [2020-12-22 10:33:25,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:25,529 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1493456719] [2020-12-22 10:33:25,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:25,542 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:25,603 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1493456719] [2020-12-22 10:33:25,604 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301553690] [2020-12-22 10:33:25,604 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:25,668 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-12-22 10:33:25,669 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:25,670 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 11 conjunts are in the unsatisfiable core [2020-12-22 10:33:25,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:25,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:25,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:25,726 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 8 [2020-12-22 10:33:25,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [79110014] [2020-12-22 10:33:25,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:25,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:25,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:25,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:25,728 INFO L87 Difference]: Start difference. First operand 43 states and 103 transitions. Second operand 10 states. [2020-12-22 10:33:25,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:25,848 INFO L93 Difference]: Finished difference Result 60 states and 137 transitions. [2020-12-22 10:33:25,848 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-12-22 10:33:25,848 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-22 10:33:25,849 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:25,850 INFO L225 Difference]: With dead ends: 60 [2020-12-22 10:33:25,850 INFO L226 Difference]: Without dead ends: 53 [2020-12-22 10:33:25,851 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:25,852 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 53 states. [2020-12-22 10:33:25,858 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 53 to 48. [2020-12-22 10:33:25,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 48 states. [2020-12-22 10:33:25,859 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 113 transitions. [2020-12-22 10:33:25,859 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 113 transitions. Word has length 13 [2020-12-22 10:33:25,865 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:25,865 INFO L481 AbstractCegarLoop]: Abstraction has 48 states and 113 transitions. [2020-12-22 10:33:25,865 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:25,865 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 113 transitions. [2020-12-22 10:33:25,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:33:25,868 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:25,868 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:26,083 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-12-22 10:33:26,084 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:26,085 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:26,085 INFO L82 PathProgramCache]: Analyzing trace with hash 226675059, now seen corresponding path program 10 times [2020-12-22 10:33:26,086 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:26,086 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [712945721] [2020-12-22 10:33:26,086 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:26,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:26,152 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:26,152 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [712945721] [2020-12-22 10:33:26,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [222081893] [2020-12-22 10:33:26,153 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 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 10:33:26,218 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:26,218 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:26,219 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:33:26,220 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:26,255 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:26,256 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:26,256 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 10:33:26,256 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [385705409] [2020-12-22 10:33:26,257 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:33:26,257 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:26,257 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:33:26,258 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:33:26,258 INFO L87 Difference]: Start difference. First operand 48 states and 113 transitions. Second operand 9 states. [2020-12-22 10:33:26,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:26,355 INFO L93 Difference]: Finished difference Result 80 states and 181 transitions. [2020-12-22 10:33:26,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-12-22 10:33:26,356 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-22 10:33:26,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:26,357 INFO L225 Difference]: With dead ends: 80 [2020-12-22 10:33:26,357 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 10:33:26,357 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=59, Invalid=123, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:33:26,358 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 10:33:26,360 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-12-22 10:33:26,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 10:33:26,361 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 125 transitions. [2020-12-22 10:33:26,361 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 125 transitions. Word has length 13 [2020-12-22 10:33:26,361 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:26,361 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 125 transitions. [2020-12-22 10:33:26,361 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:33:26,361 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 125 transitions. [2020-12-22 10:33:26,362 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:33:26,362 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:26,362 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:26,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:26,576 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:26,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:26,576 INFO L82 PathProgramCache]: Analyzing trace with hash 916634619, now seen corresponding path program 11 times [2020-12-22 10:33:26,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:26,577 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952734460] [2020-12-22 10:33:26,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:26,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:26,683 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:26,683 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952734460] [2020-12-22 10:33:26,684 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [366914608] [2020-12-22 10:33:26,684 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 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 10:33:26,780 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:26,781 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:26,782 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 10 conjunts are in the unsatisfiable core [2020-12-22 10:33:26,783 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:26,825 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:26,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:26,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-12-22 10:33:26,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1758090859] [2020-12-22 10:33:26,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-12-22 10:33:26,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:26,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-12-22 10:33:26,828 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=53, Unknown=0, NotChecked=0, Total=72 [2020-12-22 10:33:26,828 INFO L87 Difference]: Start difference. First operand 52 states and 125 transitions. Second operand 9 states. [2020-12-22 10:33:26,960 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:26,960 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-12-22 10:33:26,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:33:26,960 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-12-22 10:33:26,961 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:26,961 INFO L225 Difference]: With dead ends: 102 [2020-12-22 10:33:26,962 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 10:33:26,962 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:26,963 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 10:33:26,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 59. [2020-12-22 10:33:26,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 10:33:26,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 149 transitions. [2020-12-22 10:33:26,966 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 149 transitions. Word has length 13 [2020-12-22 10:33:26,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:26,966 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 149 transitions. [2020-12-22 10:33:26,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-12-22 10:33:26,967 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 149 transitions. [2020-12-22 10:33:26,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-12-22 10:33:26,967 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:26,967 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:27,180 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-12-22 10:33:27,181 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:27,182 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:27,182 INFO L82 PathProgramCache]: Analyzing trace with hash 917352703, now seen corresponding path program 12 times [2020-12-22 10:33:27,182 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:27,183 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2082195607] [2020-12-22 10:33:27,183 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:27,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:27,268 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 10:33:27,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2082195607] [2020-12-22 10:33:27,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [668018196] [2020-12-22 10:33:27,269 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:27,331 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-12-22 10:33:27,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:27,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 105 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:27,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:27,368 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 10:33:27,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:27,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-12-22 10:33:27,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2005202507] [2020-12-22 10:33:27,370 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:27,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:27,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:27,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:27,372 INFO L87 Difference]: Start difference. First operand 59 states and 149 transitions. Second operand 10 states. [2020-12-22 10:33:27,593 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:27,594 INFO L93 Difference]: Finished difference Result 80 states and 190 transitions. [2020-12-22 10:33:27,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:33:27,594 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-12-22 10:33:27,594 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:27,595 INFO L225 Difference]: With dead ends: 80 [2020-12-22 10:33:27,595 INFO L226 Difference]: Without dead ends: 67 [2020-12-22 10:33:27,596 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:33:27,596 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-12-22 10:33:27,599 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 54. [2020-12-22 10:33:27,599 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 10:33:27,599 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 133 transitions. [2020-12-22 10:33:27,600 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 133 transitions. Word has length 13 [2020-12-22 10:33:27,600 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:27,600 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 133 transitions. [2020-12-22 10:33:27,600 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:27,600 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 133 transitions. [2020-12-22 10:33:27,601 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:27,601 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:27,601 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:27,810 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-12-22 10:33:27,811 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:27,811 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:27,812 INFO L82 PathProgramCache]: Analyzing trace with hash 933092168, now seen corresponding path program 13 times [2020-12-22 10:33:27,812 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:27,812 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2035794823] [2020-12-22 10:33:27,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:27,823 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:27,904 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 10:33:27,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2035794823] [2020-12-22 10:33:27,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [860234607] [2020-12-22 10:33:27,904 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 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 10:33:27,984 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:27,985 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:33:27,986 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:28,035 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 10:33:28,035 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:28,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-12-22 10:33:28,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1017761588] [2020-12-22 10:33:28,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-12-22 10:33:28,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:28,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-12-22 10:33:28,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-12-22 10:33:28,038 INFO L87 Difference]: Start difference. First operand 54 states and 133 transitions. Second operand 11 states. [2020-12-22 10:33:28,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:28,209 INFO L93 Difference]: Finished difference Result 69 states and 163 transitions. [2020-12-22 10:33:28,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-12-22 10:33:28,210 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-12-22 10:33:28,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:28,211 INFO L225 Difference]: With dead ends: 69 [2020-12-22 10:33:28,211 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 10:33:28,211 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 10:33:28,212 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 10:33:28,214 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 58. [2020-12-22 10:33:28,214 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 10:33:28,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-12-22 10:33:28,215 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 14 [2020-12-22 10:33:28,215 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:28,215 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-12-22 10:33:28,215 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-12-22 10:33:28,216 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-12-22 10:33:28,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:28,216 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:28,216 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:28,429 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-12-22 10:33:28,430 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:28,431 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:28,431 INFO L82 PathProgramCache]: Analyzing trace with hash -1563003562, now seen corresponding path program 14 times [2020-12-22 10:33:28,432 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:28,432 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2032001674] [2020-12-22 10:33:28,432 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:28,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:28,530 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 10:33:28,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2032001674] [2020-12-22 10:33:28,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1910267156] [2020-12-22 10:33:28,530 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 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 10:33:28,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:28,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:28,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:28,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:28,629 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 10:33:28,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:28,630 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-22 10:33:28,630 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843812471] [2020-12-22 10:33:28,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:28,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:28,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:28,631 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:28,632 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 10 states. [2020-12-22 10:33:28,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:28,763 INFO L93 Difference]: Finished difference Result 89 states and 203 transitions. [2020-12-22 10:33:28,763 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-12-22 10:33:28,763 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 10:33:28,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:28,764 INFO L225 Difference]: With dead ends: 89 [2020-12-22 10:33:28,765 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 10:33:28,765 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 10:33:28,766 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 10:33:28,768 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 57. [2020-12-22 10:33:28,768 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 10:33:28,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 139 transitions. [2020-12-22 10:33:28,768 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 139 transitions. Word has length 14 [2020-12-22 10:33:28,771 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:28,771 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 139 transitions. [2020-12-22 10:33:28,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:28,772 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 139 transitions. [2020-12-22 10:33:28,775 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:28,775 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:28,775 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:28,990 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-12-22 10:33:28,991 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:28,992 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:28,992 INFO L82 PathProgramCache]: Analyzing trace with hash -1649093682, now seen corresponding path program 15 times [2020-12-22 10:33:28,992 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:28,992 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600277830] [2020-12-22 10:33:28,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:29,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:29,074 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 10:33:29,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600277830] [2020-12-22 10:33:29,077 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097199791] [2020-12-22 10:33:29,077 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 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 10:33:29,142 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-12-22 10:33:29,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:29,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:29,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:29,171 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 10:33:29,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:29,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-22 10:33:29,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [773878371] [2020-12-22 10:33:29,172 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:29,172 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:29,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:29,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=68, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:29,173 INFO L87 Difference]: Start difference. First operand 57 states and 139 transitions. Second operand 10 states. [2020-12-22 10:33:29,336 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:29,336 INFO L93 Difference]: Finished difference Result 85 states and 195 transitions. [2020-12-22 10:33:29,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:33:29,336 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 10:33:29,337 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:29,337 INFO L225 Difference]: With dead ends: 85 [2020-12-22 10:33:29,337 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 10:33:29,338 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 10:33:29,338 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 10:33:29,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 57. [2020-12-22 10:33:29,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 10:33:29,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 139 transitions. [2020-12-22 10:33:29,341 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 139 transitions. Word has length 14 [2020-12-22 10:33:29,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:29,341 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 139 transitions. [2020-12-22 10:33:29,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:29,342 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 139 transitions. [2020-12-22 10:33:29,342 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:29,342 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:29,342 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:29,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:29,555 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:29,556 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:29,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1626836922, now seen corresponding path program 16 times [2020-12-22 10:33:29,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:29,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631732678] [2020-12-22 10:33:29,557 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:29,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:29,656 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 10:33:29,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631732678] [2020-12-22 10:33:29,657 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1696146131] [2020-12-22 10:33:29,657 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 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 10:33:29,711 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:29,711 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:29,712 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:29,713 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:29,733 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 10:33:29,734 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:29,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-12-22 10:33:29,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2039752244] [2020-12-22 10:33:29,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-12-22 10:33:29,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:29,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-12-22 10:33:29,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-12-22 10:33:29,735 INFO L87 Difference]: Start difference. First operand 57 states and 139 transitions. Second operand 10 states. [2020-12-22 10:33:29,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:29,922 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-12-22 10:33:29,923 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:29,923 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 14 [2020-12-22 10:33:29,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:29,924 INFO L225 Difference]: With dead ends: 102 [2020-12-22 10:33:29,924 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 10:33:29,924 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 10:33:29,925 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 10:33:29,927 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 57. [2020-12-22 10:33:29,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 10:33:29,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 144 transitions. [2020-12-22 10:33:29,928 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 144 transitions. Word has length 14 [2020-12-22 10:33:29,928 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:29,928 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 144 transitions. [2020-12-22 10:33:29,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-12-22 10:33:29,929 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 144 transitions. [2020-12-22 10:33:29,929 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-12-22 10:33:29,929 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:29,929 INFO L422 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:30,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:30,144 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:30,145 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:30,145 INFO L82 PathProgramCache]: Analyzing trace with hash -1626814602, now seen corresponding path program 17 times [2020-12-22 10:33:30,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:30,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [874422909] [2020-12-22 10:33:30,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:30,156 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:30,222 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 10:33:30,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [874422909] [2020-12-22 10:33:30,222 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158002701] [2020-12-22 10:33:30,223 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 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 10:33:30,288 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-12-22 10:33:30,288 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:30,289 INFO L263 TraceCheckSpWp]: Trace formula consists of 110 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:30,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:30,328 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 10:33:30,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:30,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-22 10:33:30,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833805485] [2020-12-22 10:33:30,330 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:30,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:30,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:30,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:30,331 INFO L87 Difference]: Start difference. First operand 57 states and 144 transitions. Second operand 12 states. [2020-12-22 10:33:30,657 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:30,657 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-12-22 10:33:30,658 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:30,658 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 14 [2020-12-22 10:33:30,658 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:30,659 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:30,659 INFO L226 Difference]: Without dead ends: 73 [2020-12-22 10:33:30,660 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:33:30,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-12-22 10:33:30,662 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 52. [2020-12-22 10:33:30,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 52 states. [2020-12-22 10:33:30,663 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 126 transitions. [2020-12-22 10:33:30,663 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 126 transitions. Word has length 14 [2020-12-22 10:33:30,663 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:30,663 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 126 transitions. [2020-12-22 10:33:30,663 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:30,664 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 126 transitions. [2020-12-22 10:33:30,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:33:30,664 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:30,664 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:30,874 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-12-22 10:33:30,875 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:30,876 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:30,876 INFO L82 PathProgramCache]: Analyzing trace with hash -950727129, now seen corresponding path program 18 times [2020-12-22 10:33:30,876 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:30,877 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1073682009] [2020-12-22 10:33:30,877 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:30,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:30,979 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 10:33:30,979 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1073682009] [2020-12-22 10:33:30,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [46242426] [2020-12-22 10:33:30,980 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 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 10:33:31,048 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 10:33:31,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:31,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:33:31,051 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:31,098 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 10:33:31,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:31,099 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 10:33:31,099 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520161904] [2020-12-22 10:33:31,099 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:31,099 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:31,100 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:31,100 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=100, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:31,100 INFO L87 Difference]: Start difference. First operand 52 states and 126 transitions. Second operand 12 states. [2020-12-22 10:33:31,288 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:31,288 INFO L93 Difference]: Finished difference Result 77 states and 177 transitions. [2020-12-22 10:33:31,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:31,289 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-22 10:33:31,289 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:31,290 INFO L225 Difference]: With dead ends: 77 [2020-12-22 10:33:31,290 INFO L226 Difference]: Without dead ends: 71 [2020-12-22 10:33:31,290 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=133, Invalid=329, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:33:31,291 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-12-22 10:33:31,293 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 53. [2020-12-22 10:33:31,293 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 53 states. [2020-12-22 10:33:31,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 129 transitions. [2020-12-22 10:33:31,293 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 129 transitions. Word has length 15 [2020-12-22 10:33:31,294 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:31,294 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 129 transitions. [2020-12-22 10:33:31,294 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:31,294 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 129 transitions. [2020-12-22 10:33:31,294 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:33:31,295 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:31,295 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:31,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:31,509 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:31,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:31,510 INFO L82 PathProgramCache]: Analyzing trace with hash -1036817249, now seen corresponding path program 19 times [2020-12-22 10:33:31,510 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:31,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [848574869] [2020-12-22 10:33:31,511 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:31,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:31,589 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 10:33:31,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [848574869] [2020-12-22 10:33:31,589 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2139075479] [2020-12-22 10:33:31,590 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 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 10:33:31,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:31,656 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:33:31,657 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:31,692 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 10:33:31,693 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:31,693 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 10:33:31,693 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1051338935] [2020-12-22 10:33:31,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:31,694 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:31,694 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:31,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:31,695 INFO L87 Difference]: Start difference. First operand 53 states and 129 transitions. Second operand 12 states. [2020-12-22 10:33:31,928 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:31,928 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-12-22 10:33:31,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:31,928 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-22 10:33:31,929 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:31,929 INFO L225 Difference]: With dead ends: 83 [2020-12-22 10:33:31,929 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 10:33:31,930 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 13 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:33:31,930 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 10:33:31,932 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-12-22 10:33:31,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:33:31,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-12-22 10:33:31,933 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 15 [2020-12-22 10:33:31,933 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:31,933 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-12-22 10:33:31,933 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:31,934 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-12-22 10:33:31,934 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-12-22 10:33:31,934 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:31,934 INFO L422 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:32,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-12-22 10:33:32,148 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:32,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:32,149 INFO L82 PathProgramCache]: Analyzing trace with hash -1014534325, now seen corresponding path program 20 times [2020-12-22 10:33:32,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:32,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1333469041] [2020-12-22 10:33:32,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:32,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:32,223 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 10:33:32,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1333469041] [2020-12-22 10:33:32,224 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1217265209] [2020-12-22 10:33:32,224 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 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 10:33:32,292 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:32,292 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:32,293 INFO L263 TraceCheckSpWp]: Trace formula consists of 115 conjuncts, 12 conjunts are in the unsatisfiable core [2020-12-22 10:33:32,294 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:32,352 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:33:32,368 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 10:33:32,368 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:32,368 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 10 [2020-12-22 10:33:32,369 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1027198075] [2020-12-22 10:33:32,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:32,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:32,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:32,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=101, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:32,370 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 12 states. [2020-12-22 10:33:32,646 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:32,647 INFO L93 Difference]: Finished difference Result 94 states and 224 transitions. [2020-12-22 10:33:32,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:33:32,647 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 15 [2020-12-22 10:33:32,647 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:32,648 INFO L225 Difference]: With dead ends: 94 [2020-12-22 10:33:32,649 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 10:33:32,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 122 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:33:32,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 10:33:32,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 59. [2020-12-22 10:33:32,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 10:33:32,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 145 transitions. [2020-12-22 10:33:32,653 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 145 transitions. Word has length 15 [2020-12-22 10:33:32,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:32,653 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 145 transitions. [2020-12-22 10:33:32,653 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:32,653 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 145 transitions. [2020-12-22 10:33:32,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:32,654 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:32,654 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:32,868 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:32,869 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:32,869 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:32,870 INFO L82 PathProgramCache]: Analyzing trace with hash -946576148, now seen corresponding path program 21 times [2020-12-22 10:33:32,870 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:32,870 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945250410] [2020-12-22 10:33:32,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:32,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:32,983 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 10:33:32,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945250410] [2020-12-22 10:33:32,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874021966] [2020-12-22 10:33:32,983 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 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 10:33:33,050 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:33:33,050 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:33,051 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:33,053 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:33,105 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 10:33:33,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:33,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 10:33:33,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [224853348] [2020-12-22 10:33:33,106 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:33:33,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:33,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:33:33,107 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:33,107 INFO L87 Difference]: Start difference. First operand 59 states and 145 transitions. Second operand 13 states. [2020-12-22 10:33:33,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:33,305 INFO L93 Difference]: Finished difference Result 76 states and 179 transitions. [2020-12-22 10:33:33,306 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-12-22 10:33:33,306 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-22 10:33:33,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:33,307 INFO L225 Difference]: With dead ends: 76 [2020-12-22 10:33:33,307 INFO L226 Difference]: Without dead ends: 70 [2020-12-22 10:33:33,307 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 71 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:33:33,308 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-12-22 10:33:33,310 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 63. [2020-12-22 10:33:33,310 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:33,310 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-22 10:33:33,311 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-22 10:33:33,311 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:33,311 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-22 10:33:33,311 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:33:33,311 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-22 10:33:33,311 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:33,311 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:33,312 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:33,526 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-12-22 10:33:33,527 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:33,527 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:33,528 INFO L82 PathProgramCache]: Analyzing trace with hash 1192145786, now seen corresponding path program 22 times [2020-12-22 10:33:33,528 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:33,528 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516593369] [2020-12-22 10:33:33,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:33,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:33,624 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 10:33:33,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516593369] [2020-12-22 10:33:33,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [566569873] [2020-12-22 10:33:33,625 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:33,693 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:33,693 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:33,694 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:33,696 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:33,733 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 10:33:33,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:33,734 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 10:33:33,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1727447446] [2020-12-22 10:33:33,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:33,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:33,735 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:33,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:33,735 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-22 10:33:33,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:33,933 INFO L93 Difference]: Finished difference Result 101 states and 229 transitions. [2020-12-22 10:33:33,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-12-22 10:33:33,934 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:33,934 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:33,935 INFO L225 Difference]: With dead ends: 101 [2020-12-22 10:33:33,935 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 10:33:33,935 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:33:33,936 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 10:33:33,938 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 63. [2020-12-22 10:33:33,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:33,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-22 10:33:33,939 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-22 10:33:33,939 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:33,940 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-22 10:33:33,940 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:33,940 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-22 10:33:33,940 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:33,940 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:33,941 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:34,153 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-12-22 10:33:34,154 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:34,154 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:34,154 INFO L82 PathProgramCache]: Analyzing trace with hash 63919090, now seen corresponding path program 23 times [2020-12-22 10:33:34,154 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:34,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1144257956] [2020-12-22 10:33:34,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:34,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:34,284 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 10:33:34,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1144257956] [2020-12-22 10:33:34,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1548503551] [2020-12-22 10:33:34,285 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 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 10:33:34,353 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-12-22 10:33:34,353 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:34,355 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:34,368 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:34,390 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 10:33:34,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:34,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 10:33:34,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [920560710] [2020-12-22 10:33:34,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:34,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:34,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:34,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:34,392 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-22 10:33:34,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:34,585 INFO L93 Difference]: Finished difference Result 94 states and 215 transitions. [2020-12-22 10:33:34,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:34,586 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:34,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:34,587 INFO L225 Difference]: With dead ends: 94 [2020-12-22 10:33:34,587 INFO L226 Difference]: Without dead ends: 88 [2020-12-22 10:33:34,588 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=146, Invalid=360, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:33:34,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-12-22 10:33:34,590 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-12-22 10:33:34,590 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:34,591 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-22 10:33:34,591 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-22 10:33:34,591 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:34,591 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-22 10:33:34,591 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:34,591 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-22 10:33:34,592 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:34,592 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:34,592 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:34,801 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-12-22 10:33:34,801 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:34,802 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:34,802 INFO L82 PathProgramCache]: Analyzing trace with hash -22171030, now seen corresponding path program 24 times [2020-12-22 10:33:34,802 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:34,802 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1491766809] [2020-12-22 10:33:34,803 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:34,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:34,908 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 10:33:34,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1491766809] [2020-12-22 10:33:34,909 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1791414380] [2020-12-22 10:33:34,909 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:33:34,972 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-12-22 10:33:34,973 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:34,974 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:34,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:35,002 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 10:33:35,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:35,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 10:33:35,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917070976] [2020-12-22 10:33:35,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:35,003 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:35,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:35,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=30, Invalid=102, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:35,004 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-22 10:33:35,245 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:35,245 INFO L93 Difference]: Finished difference Result 88 states and 203 transitions. [2020-12-22 10:33:35,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:35,246 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:35,246 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:35,246 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:35,247 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 10:33:35,247 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 10:33:35,247 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 10:33:35,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 63. [2020-12-22 10:33:35,249 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:35,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 153 transitions. [2020-12-22 10:33:35,250 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 153 transitions. Word has length 16 [2020-12-22 10:33:35,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:35,250 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 153 transitions. [2020-12-22 10:33:35,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:35,250 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 153 transitions. [2020-12-22 10:33:35,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:35,251 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:35,251 INFO L422 BasicCegarLoop]: trace histogram [5, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:35,465 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-12-22 10:33:35,466 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:35,467 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:35,467 INFO L82 PathProgramCache]: Analyzing trace with hash 111894, now seen corresponding path program 25 times [2020-12-22 10:33:35,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:35,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1946907887] [2020-12-22 10:33:35,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:35,484 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:35,570 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 10:33:35,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1946907887] [2020-12-22 10:33:35,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [892698189] [2020-12-22 10:33:35,571 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 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 10:33:35,630 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:35,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 13 conjunts are in the unsatisfiable core [2020-12-22 10:33:35,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:35,660 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:33:35,663 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 10:33:35,664 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:35,664 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-12-22 10:33:35,664 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1002860641] [2020-12-22 10:33:35,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:35,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:35,665 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:35,665 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:35,665 INFO L87 Difference]: Start difference. First operand 63 states and 153 transitions. Second operand 12 states. [2020-12-22 10:33:35,945 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:35,945 INFO L93 Difference]: Finished difference Result 85 states and 203 transitions. [2020-12-22 10:33:35,946 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:35,946 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:35,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:35,947 INFO L225 Difference]: With dead ends: 85 [2020-12-22 10:33:35,947 INFO L226 Difference]: Without dead ends: 79 [2020-12-22 10:33:35,948 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-12-22 10:33:35,948 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-12-22 10:33:35,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 63. [2020-12-22 10:33:35,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:35,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-12-22 10:33:35,951 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 16 [2020-12-22 10:33:35,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:35,951 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-12-22 10:33:35,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:35,952 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-12-22 10:33:35,952 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:35,952 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:35,952 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:36,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-12-22 10:33:36,160 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:36,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:36,161 INFO L82 PathProgramCache]: Analyzing trace with hash 85730, now seen corresponding path program 26 times [2020-12-22 10:33:36,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:36,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697564128] [2020-12-22 10:33:36,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:36,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:36,241 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 10:33:36,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697564128] [2020-12-22 10:33:36,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [166214441] [2020-12-22 10:33:36,241 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 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 10:33:36,300 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:36,300 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:36,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 14 conjunts are in the unsatisfiable core [2020-12-22 10:33:36,303 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:36,328 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 10:33:36,329 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:36,329 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-12-22 10:33:36,329 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1181235300] [2020-12-22 10:33:36,329 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-12-22 10:33:36,330 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:36,330 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-12-22 10:33:36,330 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-12-22 10:33:36,330 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 12 states. [2020-12-22 10:33:36,599 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:36,600 INFO L93 Difference]: Finished difference Result 110 states and 257 transitions. [2020-12-22 10:33:36,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:36,604 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 16 [2020-12-22 10:33:36,604 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:36,605 INFO L225 Difference]: With dead ends: 110 [2020-12-22 10:33:36,605 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 10:33:36,606 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=228, Invalid=474, Unknown=0, NotChecked=0, Total=702 [2020-12-22 10:33:36,607 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 10:33:36,609 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 63. [2020-12-22 10:33:36,609 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:33:36,610 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 160 transitions. [2020-12-22 10:33:36,610 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 160 transitions. Word has length 16 [2020-12-22 10:33:36,610 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:36,610 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 160 transitions. [2020-12-22 10:33:36,610 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-12-22 10:33:36,610 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 160 transitions. [2020-12-22 10:33:36,610 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-12-22 10:33:36,611 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:36,611 INFO L422 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:36,824 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:36,825 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:36,825 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:36,826 INFO L82 PathProgramCache]: Analyzing trace with hash 108050, now seen corresponding path program 27 times [2020-12-22 10:33:36,826 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:36,826 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1949987040] [2020-12-22 10:33:36,827 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:36,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:36,897 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 10:33:36,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1949987040] [2020-12-22 10:33:36,898 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [190083808] [2020-12-22 10:33:36,898 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 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 10:33:36,958 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-12-22 10:33:36,958 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:36,959 INFO L263 TraceCheckSpWp]: Trace formula consists of 120 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:36,960 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:37,031 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 10:33:37,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:37,032 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-12-22 10:33:37,032 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1038771836] [2020-12-22 10:33:37,032 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-12-22 10:33:37,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:37,033 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-12-22 10:33:37,033 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=119, Unknown=0, NotChecked=0, Total=156 [2020-12-22 10:33:37,033 INFO L87 Difference]: Start difference. First operand 63 states and 160 transitions. Second operand 13 states. [2020-12-22 10:33:37,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:37,423 INFO L93 Difference]: Finished difference Result 88 states and 209 transitions. [2020-12-22 10:33:37,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:37,423 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 16 [2020-12-22 10:33:37,423 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:37,424 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:37,424 INFO L226 Difference]: Without dead ends: 74 [2020-12-22 10:33:37,426 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=293, Invalid=637, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:33:37,427 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-12-22 10:33:37,429 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 54. [2020-12-22 10:33:37,429 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 10:33:37,429 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-12-22 10:33:37,430 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 16 [2020-12-22 10:33:37,430 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:37,430 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-12-22 10:33:37,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-12-22 10:33:37,430 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-12-22 10:33:37,430 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:37,431 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:37,431 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:37,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-12-22 10:33:37,643 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:37,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:37,644 INFO L82 PathProgramCache]: Analyzing trace with hash 1179278347, now seen corresponding path program 28 times [2020-12-22 10:33:37,644 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:37,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [963956532] [2020-12-22 10:33:37,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:37,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:37,750 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 10:33:37,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [963956532] [2020-12-22 10:33:37,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1139870399] [2020-12-22 10:33:37,750 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 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 10:33:37,805 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:37,805 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:37,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:37,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:37,868 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 10:33:37,868 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:37,868 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 10:33:37,869 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [57642678] [2020-12-22 10:33:37,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:33:37,870 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:37,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:33:37,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:33:37,872 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand 14 states. [2020-12-22 10:33:38,117 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:38,117 INFO L93 Difference]: Finished difference Result 83 states and 191 transitions. [2020-12-22 10:33:38,118 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:38,118 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-22 10:33:38,119 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:38,119 INFO L225 Difference]: With dead ends: 83 [2020-12-22 10:33:38,120 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 10:33:38,120 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=185, Invalid=465, Unknown=0, NotChecked=0, Total=650 [2020-12-22 10:33:38,121 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 10:33:38,123 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 55. [2020-12-22 10:33:38,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-12-22 10:33:38,123 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 135 transitions. [2020-12-22 10:33:38,123 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 135 transitions. Word has length 17 [2020-12-22 10:33:38,124 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:38,124 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 135 transitions. [2020-12-22 10:33:38,124 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:33:38,124 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 135 transitions. [2020-12-22 10:33:38,124 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:38,124 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:38,125 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:38,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:38,340 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:38,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:38,341 INFO L82 PathProgramCache]: Analyzing trace with hash 51051651, now seen corresponding path program 29 times [2020-12-22 10:33:38,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:38,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1951650145] [2020-12-22 10:33:38,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:38,352 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:38,447 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 10:33:38,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1951650145] [2020-12-22 10:33:38,447 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1185165469] [2020-12-22 10:33:38,448 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 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 10:33:38,508 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 10:33:38,508 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:38,509 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:38,510 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:38,567 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 10:33:38,568 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:38,568 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 10:33:38,568 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2019739845] [2020-12-22 10:33:38,568 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:33:38,568 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:38,569 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:33:38,569 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:33:38,569 INFO L87 Difference]: Start difference. First operand 55 states and 135 transitions. Second operand 14 states. [2020-12-22 10:33:38,867 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:38,867 INFO L93 Difference]: Finished difference Result 90 states and 207 transitions. [2020-12-22 10:33:38,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:38,868 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-22 10:33:38,868 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:38,869 INFO L225 Difference]: With dead ends: 90 [2020-12-22 10:33:38,869 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 10:33:38,870 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=233, Invalid=579, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:33:38,870 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 10:33:38,872 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 57. [2020-12-22 10:33:38,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 57 states. [2020-12-22 10:33:38,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-12-22 10:33:38,873 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 17 [2020-12-22 10:33:38,873 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:38,873 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-12-22 10:33:38,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:33:38,874 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-12-22 10:33:38,874 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:38,874 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:38,874 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:39,086 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-12-22 10:33:39,087 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:39,087 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:39,087 INFO L82 PathProgramCache]: Analyzing trace with hash -35038469, now seen corresponding path program 30 times [2020-12-22 10:33:39,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:39,088 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1662387303] [2020-12-22 10:33:39,088 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:39,099 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:39,198 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 10:33:39,198 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1662387303] [2020-12-22 10:33:39,199 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1475187298] [2020-12-22 10:33:39,199 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 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 10:33:39,259 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 10:33:39,259 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:39,261 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:39,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:39,299 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 10:33:39,300 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:39,300 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 10:33:39,300 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [516635789] [2020-12-22 10:33:39,300 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:33:39,301 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:39,301 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:33:39,301 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:33:39,301 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand 14 states. [2020-12-22 10:33:39,633 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:39,633 INFO L93 Difference]: Finished difference Result 88 states and 205 transitions. [2020-12-22 10:33:39,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:39,633 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-22 10:33:39,634 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:39,634 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:39,634 INFO L226 Difference]: Without dead ends: 82 [2020-12-22 10:33:39,635 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:33:39,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 82 states. [2020-12-22 10:33:39,637 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 82 to 59. [2020-12-22 10:33:39,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 59 states. [2020-12-22 10:33:39,638 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 59 states to 59 states and 147 transitions. [2020-12-22 10:33:39,638 INFO L78 Accepts]: Start accepts. Automaton has 59 states and 147 transitions. Word has length 17 [2020-12-22 10:33:39,638 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:39,638 INFO L481 AbstractCegarLoop]: Abstraction has 59 states and 147 transitions. [2020-12-22 10:33:39,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:33:39,638 INFO L276 IsEmpty]: Start isEmpty. Operand 59 states and 147 transitions. [2020-12-22 10:33:39,639 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:39,639 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:39,639 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:39,853 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-12-22 10:33:39,854 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:39,854 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:39,855 INFO L82 PathProgramCache]: Analyzing trace with hash -12781709, now seen corresponding path program 31 times [2020-12-22 10:33:39,855 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:39,855 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [374905622] [2020-12-22 10:33:39,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:39,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:39,953 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 10:33:39,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [374905622] [2020-12-22 10:33:39,953 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [36238417] [2020-12-22 10:33:39,953 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 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 10:33:40,018 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:40,019 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:40,020 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:40,056 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 10:33:40,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:40,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 10:33:40,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [110583915] [2020-12-22 10:33:40,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:33:40,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:40,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:33:40,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:33:40,058 INFO L87 Difference]: Start difference. First operand 59 states and 147 transitions. Second operand 14 states. [2020-12-22 10:33:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:40,448 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-12-22 10:33:40,448 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:40,449 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-22 10:33:40,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:40,450 INFO L225 Difference]: With dead ends: 105 [2020-12-22 10:33:40,450 INFO L226 Difference]: Without dead ends: 99 [2020-12-22 10:33:40,451 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=339, Invalid=717, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:33:40,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 99 states. [2020-12-22 10:33:40,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 99 to 64. [2020-12-22 10:33:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 10:33:40,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 165 transitions. [2020-12-22 10:33:40,454 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 165 transitions. Word has length 17 [2020-12-22 10:33:40,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:40,454 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 165 transitions. [2020-12-22 10:33:40,454 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:33:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 165 transitions. [2020-12-22 10:33:40,455 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-12-22 10:33:40,455 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:40,455 INFO L422 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:40,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-12-22 10:33:40,669 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:40,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:40,670 INFO L82 PathProgramCache]: Analyzing trace with hash -12759389, now seen corresponding path program 32 times [2020-12-22 10:33:40,670 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:40,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2138809684] [2020-12-22 10:33:40,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:40,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:40,802 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 10:33:40,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2138809684] [2020-12-22 10:33:40,803 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616687812] [2020-12-22 10:33:40,803 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 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 10:33:40,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:40,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:40,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 125 conjuncts, 15 conjunts are in the unsatisfiable core [2020-12-22 10:33:40,870 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:40,905 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 10:33:40,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:40,907 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-12-22 10:33:40,907 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2131379062] [2020-12-22 10:33:40,908 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-12-22 10:33:40,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:40,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-12-22 10:33:40,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2020-12-22 10:33:40,910 INFO L87 Difference]: Start difference. First operand 64 states and 165 transitions. Second operand 14 states. [2020-12-22 10:33:41,366 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:41,367 INFO L93 Difference]: Finished difference Result 88 states and 213 transitions. [2020-12-22 10:33:41,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:41,367 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 17 [2020-12-22 10:33:41,368 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:41,368 INFO L225 Difference]: With dead ends: 88 [2020-12-22 10:33:41,368 INFO L226 Difference]: Without dead ends: 77 [2020-12-22 10:33:41,369 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 10:33:41,369 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-12-22 10:33:41,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 50. [2020-12-22 10:33:41,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-12-22 10:33:41,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-12-22 10:33:41,371 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 17 [2020-12-22 10:33:41,372 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:41,372 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-12-22 10:33:41,372 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-12-22 10:33:41,372 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-12-22 10:33:41,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:41,373 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:41,373 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:41,585 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-12-22 10:33:41,586 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:41,586 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:41,587 INFO L82 PathProgramCache]: Analyzing trace with hash 873403792, now seen corresponding path program 33 times [2020-12-22 10:33:41,587 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:41,588 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1138645992] [2020-12-22 10:33:41,588 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:41,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:41,721 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 10:33:41,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1138645992] [2020-12-22 10:33:41,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1253051561] [2020-12-22 10:33:41,722 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 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 10:33:41,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 10:33:41,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:41,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:33:41,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:41,856 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 10:33:41,856 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:41,857 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-22 10:33:41,857 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519784521] [2020-12-22 10:33:41,857 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:41,857 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:41,858 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:41,858 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=179, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:41,858 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand 16 states. [2020-12-22 10:33:42,127 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:42,127 INFO L93 Difference]: Finished difference Result 69 states and 159 transitions. [2020-12-22 10:33:42,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-12-22 10:33:42,128 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-22 10:33:42,128 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:42,129 INFO L225 Difference]: With dead ends: 69 [2020-12-22 10:33:42,129 INFO L226 Difference]: Without dead ends: 63 [2020-12-22 10:33:42,129 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=240, Invalid=516, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:33:42,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-12-22 10:33:42,131 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 54. [2020-12-22 10:33:42,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 54 states. [2020-12-22 10:33:42,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 129 transitions. [2020-12-22 10:33:42,132 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 129 transitions. Word has length 18 [2020-12-22 10:33:42,132 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:42,132 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 129 transitions. [2020-12-22 10:33:42,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:42,133 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 129 transitions. [2020-12-22 10:33:42,133 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:42,133 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:42,133 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:42,338 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-12-22 10:33:42,339 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:42,340 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:42,340 INFO L82 PathProgramCache]: Analyzing trace with hash -1104152418, now seen corresponding path program 34 times [2020-12-22 10:33:42,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:42,341 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [479022400] [2020-12-22 10:33:42,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:42,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:42,470 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 10:33:42,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [479022400] [2020-12-22 10:33:42,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [944962401] [2020-12-22 10:33:42,470 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 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 10:33:42,531 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:42,532 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:42,533 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:42,534 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:42,575 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:42,577 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:42,577 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:42,577 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146848860] [2020-12-22 10:33:42,579 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:42,579 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:42,579 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:42,579 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:42,580 INFO L87 Difference]: Start difference. First operand 54 states and 129 transitions. Second operand 15 states. [2020-12-22 10:33:42,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:42,792 INFO L93 Difference]: Finished difference Result 102 states and 229 transitions. [2020-12-22 10:33:42,792 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-12-22 10:33:42,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:42,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:42,794 INFO L225 Difference]: With dead ends: 102 [2020-12-22 10:33:42,794 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 10:33:42,794 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 10:33:42,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 10:33:42,797 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 58. [2020-12-22 10:33:42,797 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 10:33:42,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-12-22 10:33:42,798 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 18 [2020-12-22 10:33:42,798 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:42,798 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-12-22 10:33:42,798 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:42,798 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-12-22 10:33:42,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:42,799 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:42,799 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:43,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:43,013 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:43,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:43,014 INFO L82 PathProgramCache]: Analyzing trace with hash 1296718614, now seen corresponding path program 35 times [2020-12-22 10:33:43,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:43,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1917294718] [2020-12-22 10:33:43,014 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:43,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:43,129 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 10:33:43,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1917294718] [2020-12-22 10:33:43,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664625227] [2020-12-22 10:33:43,130 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 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 10:33:43,188 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-12-22 10:33:43,189 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:43,190 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:43,191 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:43,253 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 10:33:43,254 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:43,254 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:43,254 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1931511768] [2020-12-22 10:33:43,254 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:43,254 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:43,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:43,255 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:43,255 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 15 states. [2020-12-22 10:33:43,525 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:43,526 INFO L93 Difference]: Finished difference Result 97 states and 221 transitions. [2020-12-22 10:33:43,526 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:43,527 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:43,527 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:43,528 INFO L225 Difference]: With dead ends: 97 [2020-12-22 10:33:43,528 INFO L226 Difference]: Without dead ends: 91 [2020-12-22 10:33:43,529 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=214, Invalid=542, Unknown=0, NotChecked=0, Total=756 [2020-12-22 10:33:43,529 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-12-22 10:33:43,531 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 60. [2020-12-22 10:33:43,532 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 60 states. [2020-12-22 10:33:43,532 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 147 transitions. [2020-12-22 10:33:43,532 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 147 transitions. Word has length 18 [2020-12-22 10:33:43,532 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:43,532 INFO L481 AbstractCegarLoop]: Abstraction has 60 states and 147 transitions. [2020-12-22 10:33:43,533 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:43,533 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 147 transitions. [2020-12-22 10:33:43,533 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:43,533 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:43,533 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:43,742 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-12-22 10:33:43,743 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:43,743 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:43,744 INFO L82 PathProgramCache]: Analyzing trace with hash 168491918, now seen corresponding path program 36 times [2020-12-22 10:33:43,744 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:43,744 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1908553343] [2020-12-22 10:33:43,744 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:43,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:43,865 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 10:33:43,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1908553343] [2020-12-22 10:33:43,865 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [598481723] [2020-12-22 10:33:43,865 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 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 10:33:43,939 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-12-22 10:33:43,939 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:43,941 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:43,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:43,978 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 10:33:43,978 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:43,978 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:43,979 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403177540] [2020-12-22 10:33:43,979 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:43,979 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:43,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:43,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:43,980 INFO L87 Difference]: Start difference. First operand 60 states and 147 transitions. Second operand 15 states. [2020-12-22 10:33:44,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:44,299 INFO L93 Difference]: Finished difference Result 95 states and 219 transitions. [2020-12-22 10:33:44,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:44,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:44,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:44,301 INFO L225 Difference]: With dead ends: 95 [2020-12-22 10:33:44,301 INFO L226 Difference]: Without dead ends: 89 [2020-12-22 10:33:44,301 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=244, Invalid=626, Unknown=0, NotChecked=0, Total=870 [2020-12-22 10:33:44,301 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 89 states. [2020-12-22 10:33:44,303 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 89 to 62. [2020-12-22 10:33:44,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 10:33:44,304 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 153 transitions. [2020-12-22 10:33:44,304 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 153 transitions. Word has length 18 [2020-12-22 10:33:44,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:44,304 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 153 transitions. [2020-12-22 10:33:44,304 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:44,304 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 153 transitions. [2020-12-22 10:33:44,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:44,305 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:44,305 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:44,518 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-12-22 10:33:44,519 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:44,520 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:44,520 INFO L82 PathProgramCache]: Analyzing trace with hash 82401798, now seen corresponding path program 37 times [2020-12-22 10:33:44,520 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:44,521 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716981552] [2020-12-22 10:33:44,521 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:44,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:44,630 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 10:33:44,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716981552] [2020-12-22 10:33:44,631 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [462052531] [2020-12-22 10:33:44,631 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 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 10:33:44,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:44,693 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:44,694 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:44,730 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 10:33:44,730 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:44,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:44,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1325701121] [2020-12-22 10:33:44,731 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:44,731 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:44,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:44,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:44,732 INFO L87 Difference]: Start difference. First operand 62 states and 153 transitions. Second operand 15 states. [2020-12-22 10:33:45,077 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:45,078 INFO L93 Difference]: Finished difference Result 93 states and 217 transitions. [2020-12-22 10:33:45,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:45,078 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:45,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:45,079 INFO L225 Difference]: With dead ends: 93 [2020-12-22 10:33:45,080 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 10:33:45,080 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 10:33:45,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 10:33:45,083 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 64. [2020-12-22 10:33:45,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 10:33:45,084 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 159 transitions. [2020-12-22 10:33:45,084 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 159 transitions. Word has length 18 [2020-12-22 10:33:45,084 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:45,084 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 159 transitions. [2020-12-22 10:33:45,084 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:45,084 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 159 transitions. [2020-12-22 10:33:45,085 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:45,085 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:45,085 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:45,291 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:45,292 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:45,293 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:45,293 INFO L82 PathProgramCache]: Analyzing trace with hash 104658558, now seen corresponding path program 38 times [2020-12-22 10:33:45,293 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:45,293 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343076285] [2020-12-22 10:33:45,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:45,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:45,398 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 10:33:45,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343076285] [2020-12-22 10:33:45,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123209171] [2020-12-22 10:33:45,399 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 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 10:33:45,451 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:45,452 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:45,453 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 16 conjunts are in the unsatisfiable core [2020-12-22 10:33:45,454 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:45,487 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 10:33:45,488 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:45,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-12-22 10:33:45,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563291263] [2020-12-22 10:33:45,489 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:45,489 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:45,489 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:45,489 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:45,490 INFO L87 Difference]: Start difference. First operand 64 states and 159 transitions. Second operand 15 states. [2020-12-22 10:33:45,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:45,898 INFO L93 Difference]: Finished difference Result 111 states and 263 transitions. [2020-12-22 10:33:45,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:45,899 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 18 [2020-12-22 10:33:45,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:45,900 INFO L225 Difference]: With dead ends: 111 [2020-12-22 10:33:45,900 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 10:33:45,901 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 249 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=352, Invalid=770, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:33:45,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 10:33:45,904 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 69. [2020-12-22 10:33:45,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 10:33:45,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 177 transitions. [2020-12-22 10:33:45,905 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 177 transitions. Word has length 18 [2020-12-22 10:33:45,905 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:45,905 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 177 transitions. [2020-12-22 10:33:45,905 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:45,905 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 177 transitions. [2020-12-22 10:33:45,906 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-12-22 10:33:45,906 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:45,906 INFO L422 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:46,119 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-12-22 10:33:46,120 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:46,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:46,121 INFO L82 PathProgramCache]: Analyzing trace with hash 104680878, now seen corresponding path program 39 times [2020-12-22 10:33:46,121 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:46,121 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [926798031] [2020-12-22 10:33:46,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:46,130 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:46,233 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 10:33:46,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [926798031] [2020-12-22 10:33:46,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2122782881] [2020-12-22 10:33:46,234 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 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 10:33:46,297 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-12-22 10:33:46,297 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:46,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 130 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:46,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:46,358 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 10:33:46,358 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:46,358 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 14 [2020-12-22 10:33:46,358 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489640023] [2020-12-22 10:33:46,359 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:46,359 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:46,359 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:46,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:46,360 INFO L87 Difference]: Start difference. First operand 69 states and 177 transitions. Second operand 16 states. [2020-12-22 10:33:46,961 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:46,961 INFO L93 Difference]: Finished difference Result 109 states and 259 transitions. [2020-12-22 10:33:46,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:33:46,962 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 18 [2020-12-22 10:33:46,962 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:46,963 INFO L225 Difference]: With dead ends: 109 [2020-12-22 10:33:46,963 INFO L226 Difference]: Without dead ends: 96 [2020-12-22 10:33:46,964 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 15 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 345 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=447, Invalid=1035, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:33:46,964 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-12-22 10:33:46,966 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 68. [2020-12-22 10:33:46,966 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:46,967 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:46,967 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 18 [2020-12-22 10:33:46,967 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:46,967 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:46,967 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:46,967 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:46,968 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:46,968 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:46,968 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:47,182 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:47,183 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:47,184 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:47,184 INFO L82 PathProgramCache]: Analyzing trace with hash -584859409, now seen corresponding path program 40 times [2020-12-22 10:33:47,184 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:47,185 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631953089] [2020-12-22 10:33:47,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:47,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:47,313 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 10:33:47,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631953089] [2020-12-22 10:33:47,314 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [826555085] [2020-12-22 10:33:47,314 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 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 10:33:47,374 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:47,374 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:47,375 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:47,376 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:47,412 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 10:33:47,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:47,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:47,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1687175044] [2020-12-22 10:33:47,414 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:47,414 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:47,414 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:47,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:47,415 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:47,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:47,715 INFO L93 Difference]: Finished difference Result 100 states and 235 transitions. [2020-12-22 10:33:47,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:47,716 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:47,716 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:47,717 INFO L225 Difference]: With dead ends: 100 [2020-12-22 10:33:47,717 INFO L226 Difference]: Without dead ends: 94 [2020-12-22 10:33:47,719 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=229, Invalid=583, Unknown=0, NotChecked=0, Total=812 [2020-12-22 10:33:47,719 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-12-22 10:33:47,722 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 68. [2020-12-22 10:33:47,722 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:47,730 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:47,730 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-22 10:33:47,730 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:47,730 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:47,730 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:47,730 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:47,731 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:47,731 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:47,731 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:47,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-12-22 10:33:47,935 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:47,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:47,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1816011623, now seen corresponding path program 41 times [2020-12-22 10:33:47,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:47,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [894906265] [2020-12-22 10:33:47,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:47,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:48,055 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:48,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [894906265] [2020-12-22 10:33:48,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [913210336] [2020-12-22 10:33:48,056 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 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 10:33:48,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 10:33:48,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:48,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:48,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:48,150 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 10:33:48,151 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:48,151 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:48,151 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228755017] [2020-12-22 10:33:48,151 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:48,151 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:48,152 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:48,152 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:48,152 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:48,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:48,499 INFO L93 Difference]: Finished difference Result 107 states and 249 transitions. [2020-12-22 10:33:48,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:48,500 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:48,500 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:48,501 INFO L225 Difference]: With dead ends: 107 [2020-12-22 10:33:48,501 INFO L226 Difference]: Without dead ends: 101 [2020-12-22 10:33:48,501 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 10:33:48,502 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 101 states. [2020-12-22 10:33:48,504 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 101 to 68. [2020-12-22 10:33:48,504 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:48,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:48,505 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-22 10:33:48,505 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:48,505 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:48,505 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:48,505 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:48,506 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:48,506 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:48,506 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:48,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-12-22 10:33:48,707 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:48,708 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:48,708 INFO L82 PathProgramCache]: Analyzing trace with hash 687784927, now seen corresponding path program 42 times [2020-12-22 10:33:48,709 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:48,709 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1282456663] [2020-12-22 10:33:48,709 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:48,717 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:48,825 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:48,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1282456663] [2020-12-22 10:33:48,826 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111725923] [2020-12-22 10:33:48,826 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 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 10:33:48,896 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 10:33:48,897 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:48,898 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:48,899 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:48,923 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 10:33:48,923 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:48,923 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:48,923 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263903221] [2020-12-22 10:33:48,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:48,924 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:48,924 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:48,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:48,925 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:49,297 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:49,298 INFO L93 Difference]: Finished difference Result 103 states and 241 transitions. [2020-12-22 10:33:49,298 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:49,298 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:49,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:49,299 INFO L225 Difference]: With dead ends: 103 [2020-12-22 10:33:49,299 INFO L226 Difference]: Without dead ends: 97 [2020-12-22 10:33:49,300 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=322, Invalid=800, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:33:49,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 97 states. [2020-12-22 10:33:49,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 97 to 68. [2020-12-22 10:33:49,302 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:49,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:49,303 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-22 10:33:49,303 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:49,303 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:49,303 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:49,304 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:49,304 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:49,304 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:49,304 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:49,517 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-12-22 10:33:49,517 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:49,518 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:49,518 INFO L82 PathProgramCache]: Analyzing trace with hash 601694807, now seen corresponding path program 43 times [2020-12-22 10:33:49,518 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:49,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104624472] [2020-12-22 10:33:49,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:49,538 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:49,663 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 10:33:49,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104624472] [2020-12-22 10:33:49,664 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [556830796] [2020-12-22 10:33:49,664 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 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 10:33:49,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:49,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:49,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:49,752 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 10:33:49,753 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:49,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:49,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [264519913] [2020-12-22 10:33:49,753 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:49,753 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:49,754 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:49,754 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:49,754 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:50,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:50,178 INFO L93 Difference]: Finished difference Result 99 states and 233 transitions. [2020-12-22 10:33:50,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:33:50,179 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:50,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:50,180 INFO L225 Difference]: With dead ends: 99 [2020-12-22 10:33:50,180 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 10:33:50,181 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 295 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=382, Invalid=878, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:33:50,181 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 10:33:50,183 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 68. [2020-12-22 10:33:50,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:33:50,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 171 transitions. [2020-12-22 10:33:50,184 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 171 transitions. Word has length 19 [2020-12-22 10:33:50,184 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:50,185 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 171 transitions. [2020-12-22 10:33:50,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:50,185 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 171 transitions. [2020-12-22 10:33:50,185 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:50,185 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:50,185 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:50,400 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-12-22 10:33:50,401 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:50,401 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:50,402 INFO L82 PathProgramCache]: Analyzing trace with hash 623951567, now seen corresponding path program 44 times [2020-12-22 10:33:50,402 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:50,402 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [915254608] [2020-12-22 10:33:50,402 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:50,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:50,507 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 10:33:50,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [915254608] [2020-12-22 10:33:50,508 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [553583848] [2020-12-22 10:33:50,508 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 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 10:33:50,571 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:50,573 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:50,597 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 10:33:50,597 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:50,598 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-12-22 10:33:50,598 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1010680810] [2020-12-22 10:33:50,598 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-12-22 10:33:50,598 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:50,599 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-12-22 10:33:50,599 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-12-22 10:33:50,599 INFO L87 Difference]: Start difference. First operand 68 states and 171 transitions. Second operand 15 states. [2020-12-22 10:33:51,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:51,044 INFO L93 Difference]: Finished difference Result 115 states and 273 transitions. [2020-12-22 10:33:51,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:33:51,044 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 19 [2020-12-22 10:33:51,044 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:51,045 INFO L225 Difference]: With dead ends: 115 [2020-12-22 10:33:51,046 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 10:33:51,047 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 354 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=458, Invalid=948, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:33:51,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 10:33:51,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 72. [2020-12-22 10:33:51,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 10:33:51,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 185 transitions. [2020-12-22 10:33:51,050 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 185 transitions. Word has length 19 [2020-12-22 10:33:51,050 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:51,051 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 185 transitions. [2020-12-22 10:33:51,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-12-22 10:33:51,051 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 185 transitions. [2020-12-22 10:33:51,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-12-22 10:33:51,051 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:51,051 INFO L422 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:51,266 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:51,267 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:51,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:51,268 INFO L82 PathProgramCache]: Analyzing trace with hash 623973887, now seen corresponding path program 45 times [2020-12-22 10:33:51,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:51,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1044317123] [2020-12-22 10:33:51,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:51,281 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:51,385 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 10:33:51,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1044317123] [2020-12-22 10:33:51,385 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946337666] [2020-12-22 10:33:51,385 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 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 10:33:51,461 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 10:33:51,461 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:51,462 INFO L263 TraceCheckSpWp]: Trace formula consists of 135 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:51,463 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:51,501 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 10:33:51,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:51,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-12-22 10:33:51,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1006285392] [2020-12-22 10:33:51,502 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:51,502 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:51,503 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:51,503 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:51,503 INFO L87 Difference]: Start difference. First operand 72 states and 185 transitions. Second operand 16 states. [2020-12-22 10:33:52,071 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:52,071 INFO L93 Difference]: Finished difference Result 98 states and 237 transitions. [2020-12-22 10:33:52,071 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:33:52,071 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 19 [2020-12-22 10:33:52,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:52,072 INFO L225 Difference]: With dead ends: 98 [2020-12-22 10:33:52,072 INFO L226 Difference]: Without dead ends: 87 [2020-12-22 10:33:52,073 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 55 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=484, Invalid=1076, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:33:52,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-12-22 10:33:52,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 69. [2020-12-22 10:33:52,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 10:33:52,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 175 transitions. [2020-12-22 10:33:52,076 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 175 transitions. Word has length 19 [2020-12-22 10:33:52,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:52,076 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 175 transitions. [2020-12-22 10:33:52,076 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:52,077 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 175 transitions. [2020-12-22 10:33:52,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:52,077 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:52,077 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:52,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-12-22 10:33:52,287 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:52,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:52,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1822436660, now seen corresponding path program 46 times [2020-12-22 10:33:52,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:52,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400340595] [2020-12-22 10:33:52,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:52,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:52,453 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 10:33:52,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400340595] [2020-12-22 10:33:52,454 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [398240284] [2020-12-22 10:33:52,454 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 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 10:33:52,512 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:52,512 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:52,514 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:33:52,515 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:52,556 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 10:33:52,556 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:52,556 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 10:33:52,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1795961102] [2020-12-22 10:33:52,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:33:52,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:52,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:33:52,558 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:33:52,558 INFO L87 Difference]: Start difference. First operand 69 states and 175 transitions. Second operand 17 states. [2020-12-22 10:33:52,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:52,870 INFO L93 Difference]: Finished difference Result 90 states and 217 transitions. [2020-12-22 10:33:52,870 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-12-22 10:33:52,870 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-22 10:33:52,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:52,871 INFO L225 Difference]: With dead ends: 90 [2020-12-22 10:33:52,871 INFO L226 Difference]: Without dead ends: 84 [2020-12-22 10:33:52,873 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 18 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=290, Invalid=640, Unknown=0, NotChecked=0, Total=930 [2020-12-22 10:33:52,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-12-22 10:33:52,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 73. [2020-12-22 10:33:52,876 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:52,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:52,881 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:52,881 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:52,881 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:52,881 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:33:52,881 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:52,881 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:52,882 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:52,882 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:53,090 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-12-22 10:33:53,091 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:53,091 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:53,092 INFO L82 PathProgramCache]: Analyzing trace with hash -233536318, now seen corresponding path program 47 times [2020-12-22 10:33:53,092 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:53,092 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [372939954] [2020-12-22 10:33:53,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:53,102 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:53,255 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 10:33:53,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [372939954] [2020-12-22 10:33:53,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [549424925] [2020-12-22 10:33:53,256 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 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 10:33:53,308 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 10:33:53,308 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:53,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:53,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:53,346 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:53,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:53,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:53,346 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1167015178] [2020-12-22 10:33:53,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:53,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:53,347 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:53,347 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:53,347 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:33:53,631 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:53,631 INFO L93 Difference]: Finished difference Result 123 states and 283 transitions. [2020-12-22 10:33:53,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-12-22 10:33:53,632 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:33:53,632 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:53,633 INFO L225 Difference]: With dead ends: 123 [2020-12-22 10:33:53,634 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 10:33:53,634 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 10:33:53,635 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 10:33:53,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 73. [2020-12-22 10:33:53,637 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:53,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:53,637 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:53,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:53,637 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:53,638 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:53,638 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:53,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:53,638 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:53,638 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:53,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:53,852 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:53,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:53,852 INFO L82 PathProgramCache]: Analyzing trace with hash 606087482, now seen corresponding path program 48 times [2020-12-22 10:33:53,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:53,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [680495938] [2020-12-22 10:33:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:53,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:54,005 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 10:33:54,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [680495938] [2020-12-22 10:33:54,005 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1013554379] [2020-12-22 10:33:54,005 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 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 10:33:54,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-12-22 10:33:54,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:54,076 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:33:54,077 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:54,107 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 10:33:54,108 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:54,108 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:54,108 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246818490] [2020-12-22 10:33:54,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:54,108 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:54,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:54,110 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:54,110 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:33:54,418 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:54,418 INFO L93 Difference]: Finished difference Result 116 states and 269 transitions. [2020-12-22 10:33:54,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:33:54,419 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:33:54,419 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:54,420 INFO L225 Difference]: With dead ends: 116 [2020-12-22 10:33:54,420 INFO L226 Difference]: Without dead ends: 110 [2020-12-22 10:33:54,420 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 10:33:54,420 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2020-12-22 10:33:54,422 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 73. [2020-12-22 10:33:54,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:54,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:54,423 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:54,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:54,423 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:54,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:54,423 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:54,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:54,424 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:54,424 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:54,624 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-12-22 10:33:54,625 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:54,625 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:54,626 INFO L82 PathProgramCache]: Analyzing trace with hash -1288008782, now seen corresponding path program 49 times [2020-12-22 10:33:54,626 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:54,626 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429378356] [2020-12-22 10:33:54,626 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:54,635 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:54,752 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 10:33:54,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429378356] [2020-12-22 10:33:54,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [588850310] [2020-12-22 10:33:54,753 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 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 10:33:54,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:54,815 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:54,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:54,840 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 10:33:54,841 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:54,841 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:54,841 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [391133335] [2020-12-22 10:33:54,841 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:54,841 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:54,842 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:54,842 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:54,842 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:33:55,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:55,208 INFO L93 Difference]: Finished difference Result 112 states and 261 transitions. [2020-12-22 10:33:55,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:33:55,209 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:33:55,209 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:55,210 INFO L225 Difference]: With dead ends: 112 [2020-12-22 10:33:55,210 INFO L226 Difference]: Without dead ends: 106 [2020-12-22 10:33:55,210 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 199 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=289, Invalid=767, Unknown=0, NotChecked=0, Total=1056 [2020-12-22 10:33:55,210 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-12-22 10:33:55,212 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2020-12-22 10:33:55,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:55,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:55,212 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:55,212 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:55,212 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:55,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:55,213 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:55,213 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:55,213 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:55,213 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:55,413 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:55,414 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:55,414 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:55,415 INFO L82 PathProgramCache]: Analyzing trace with hash 1878731818, now seen corresponding path program 50 times [2020-12-22 10:33:55,415 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:55,415 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860901081] [2020-12-22 10:33:55,415 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:55,423 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:55,533 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 10:33:55,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860901081] [2020-12-22 10:33:55,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1557772681] [2020-12-22 10:33:55,534 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 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 10:33:55,598 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:33:55,598 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:55,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:55,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:55,630 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 10:33:55,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:55,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:55,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767204540] [2020-12-22 10:33:55,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:55,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:55,632 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:55,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=192, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:55,632 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:33:56,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:56,017 INFO L93 Difference]: Finished difference Result 108 states and 253 transitions. [2020-12-22 10:33:56,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:33:56,018 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:33:56,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:56,019 INFO L225 Difference]: With dead ends: 108 [2020-12-22 10:33:56,019 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 10:33:56,019 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 243 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=334, Invalid=856, Unknown=0, NotChecked=0, Total=1190 [2020-12-22 10:33:56,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 10:33:56,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 73. [2020-12-22 10:33:56,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:56,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:56,022 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:56,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:56,023 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:56,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:56,023 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:56,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:56,023 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:56,023 INFO L422 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:56,238 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-12-22 10:33:56,239 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:56,239 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:56,240 INFO L82 PathProgramCache]: Analyzing trace with hash 1792641698, now seen corresponding path program 51 times [2020-12-22 10:33:56,240 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:56,240 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677113218] [2020-12-22 10:33:56,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:56,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:56,352 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:33:56,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677113218] [2020-12-22 10:33:56,353 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [864209387] [2020-12-22 10:33:56,353 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 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 10:33:56,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-12-22 10:33:56,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:56,425 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:33:56,426 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:56,456 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 10:33:56,456 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:56,456 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-12-22 10:33:56,458 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1429523117] [2020-12-22 10:33:56,458 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-12-22 10:33:56,459 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:56,459 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-12-22 10:33:56,459 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=188, Unknown=0, NotChecked=0, Total=240 [2020-12-22 10:33:56,459 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 16 states. [2020-12-22 10:33:56,937 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:56,937 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-12-22 10:33:56,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:33:56,938 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 20 [2020-12-22 10:33:56,938 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:56,939 INFO L225 Difference]: With dead ends: 104 [2020-12-22 10:33:56,939 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 10:33:56,939 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 291 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:33:56,940 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 10:33:56,941 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 73. [2020-12-22 10:33:56,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 73 states. [2020-12-22 10:33:56,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 183 transitions. [2020-12-22 10:33:56,942 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 183 transitions. Word has length 20 [2020-12-22 10:33:56,942 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:56,942 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 183 transitions. [2020-12-22 10:33:56,942 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-12-22 10:33:56,942 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 183 transitions. [2020-12-22 10:33:56,943 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-12-22 10:33:56,943 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:56,943 INFO L422 BasicCegarLoop]: trace histogram [7, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:57,150 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:33:57,151 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:57,151 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:57,151 INFO L82 PathProgramCache]: Analyzing trace with hash 1814924622, now seen corresponding path program 52 times [2020-12-22 10:33:57,152 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:57,152 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1419326010] [2020-12-22 10:33:57,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:57,160 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:57,254 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 10:33:57,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1419326010] [2020-12-22 10:33:57,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1979987576] [2020-12-22 10:33:57,254 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 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 10:33:57,318 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:33:57,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:57,320 INFO L263 TraceCheckSpWp]: Trace formula consists of 140 conjuncts, 17 conjunts are in the unsatisfiable core [2020-12-22 10:33:57,321 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:57,358 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:33:57,373 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 10:33:57,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:57,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 15 [2020-12-22 10:33:57,375 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [94053800] [2020-12-22 10:33:57,375 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:33:57,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:57,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:33:57,376 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:33:57,376 INFO L87 Difference]: Start difference. First operand 73 states and 183 transitions. Second operand 17 states. [2020-12-22 10:33:57,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:57,914 INFO L93 Difference]: Finished difference Result 115 states and 276 transitions. [2020-12-22 10:33:57,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-12-22 10:33:57,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 20 [2020-12-22 10:33:57,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:57,915 INFO L225 Difference]: With dead ends: 115 [2020-12-22 10:33:57,915 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 10:33:57,916 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 335 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=1015, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:33:57,916 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 10:33:57,918 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 76. [2020-12-22 10:33:57,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 10:33:57,919 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-12-22 10:33:57,919 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 20 [2020-12-22 10:33:57,919 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:57,919 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-12-22 10:33:57,919 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:33:57,919 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-12-22 10:33:57,920 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:33:57,920 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:57,920 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:58,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-12-22 10:33:58,129 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:58,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:58,130 INFO L82 PathProgramCache]: Analyzing trace with hash 427277707, now seen corresponding path program 53 times [2020-12-22 10:33:58,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:58,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1060748939] [2020-12-22 10:33:58,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:58,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:58,248 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:58,248 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1060748939] [2020-12-22 10:33:58,249 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1603378206] [2020-12-22 10:33:58,249 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 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 10:33:58,317 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-12-22 10:33:58,318 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:58,319 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 18 conjunts are in the unsatisfiable core [2020-12-22 10:33:58,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:58,356 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 35 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:33:58,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:58,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-12-22 10:33:58,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832266013] [2020-12-22 10:33:58,357 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-12-22 10:33:58,357 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:58,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-12-22 10:33:58,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-12-22 10:33:58,358 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 17 states. [2020-12-22 10:33:58,844 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:33:58,844 INFO L93 Difference]: Finished difference Result 126 states and 299 transitions. [2020-12-22 10:33:58,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:33:58,845 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 21 [2020-12-22 10:33:58,846 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:33:58,847 INFO L225 Difference]: With dead ends: 126 [2020-12-22 10:33:58,847 INFO L226 Difference]: Without dead ends: 118 [2020-12-22 10:33:58,848 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=487, Invalid=1073, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:33:58,848 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-12-22 10:33:58,850 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 78. [2020-12-22 10:33:58,851 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 10:33:58,851 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 200 transitions. [2020-12-22 10:33:58,851 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 200 transitions. Word has length 21 [2020-12-22 10:33:58,851 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:33:58,851 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 200 transitions. [2020-12-22 10:33:58,852 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-12-22 10:33:58,852 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 200 transitions. [2020-12-22 10:33:58,852 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:33:58,852 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:33:58,852 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:33:59,066 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-12-22 10:33:59,067 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:33:59,067 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:33:59,068 INFO L82 PathProgramCache]: Analyzing trace with hash 427995791, now seen corresponding path program 54 times [2020-12-22 10:33:59,068 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:33:59,068 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244121810] [2020-12-22 10:33:59,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:33:59,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:33:59,185 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 10:33:59,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244121810] [2020-12-22 10:33:59,186 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479167464] [2020-12-22 10:33:59,186 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 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 10:33:59,252 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 10:33:59,253 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:33:59,254 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:33:59,255 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:33:59,296 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 10:33:59,296 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:33:59,296 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 10:33:59,297 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570337070] [2020-12-22 10:33:59,297 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:33:59,297 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:33:59,298 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:33:59,298 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:33:59,299 INFO L87 Difference]: Start difference. First operand 78 states and 200 transitions. Second operand 18 states. [2020-12-22 10:34:00,014 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:00,014 INFO L93 Difference]: Finished difference Result 106 states and 256 transitions. [2020-12-22 10:34:00,015 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:00,015 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 10:34:00,015 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:00,016 INFO L225 Difference]: With dead ends: 106 [2020-12-22 10:34:00,016 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 10:34:00,016 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 465 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=581, Invalid=1399, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:34:00,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 10:34:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 62. [2020-12-22 10:34:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 10:34:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-12-22 10:34:00,019 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 21 [2020-12-22 10:34:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:00,020 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-12-22 10:34:00,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-12-22 10:34:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:00,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:00,020 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:00,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-12-22 10:34:00,235 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:00,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:00,236 INFO L82 PathProgramCache]: Analyzing trace with hash 590838995, now seen corresponding path program 55 times [2020-12-22 10:34:00,236 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:00,236 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1012458756] [2020-12-22 10:34:00,237 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:00,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:00,420 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 10:34:00,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1012458756] [2020-12-22 10:34:00,420 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [673051544] [2020-12-22 10:34:00,420 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 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 10:34:00,480 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:00,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:00,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:00,526 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 10:34:00,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:00,527 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 10:34:00,527 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [725045648] [2020-12-22 10:34:00,528 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:00,528 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:00,528 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:00,528 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:00,528 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand 18 states. [2020-12-22 10:34:00,903 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:00,903 INFO L93 Difference]: Finished difference Result 99 states and 227 transitions. [2020-12-22 10:34:00,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:34:00,904 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 10:34:00,904 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:00,905 INFO L225 Difference]: With dead ends: 99 [2020-12-22 10:34:00,905 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 10:34:00,905 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 186 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=319, Invalid=803, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:34:00,906 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 10:34:00,908 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 63. [2020-12-22 10:34:00,908 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 63 states. [2020-12-22 10:34:00,908 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 155 transitions. [2020-12-22 10:34:00,909 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 155 transitions. Word has length 21 [2020-12-22 10:34:00,909 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:00,909 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 155 transitions. [2020-12-22 10:34:00,909 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:00,909 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 155 transitions. [2020-12-22 10:34:00,909 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:00,909 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:00,910 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:01,123 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-12-22 10:34:01,124 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:01,124 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:01,124 INFO L82 PathProgramCache]: Analyzing trace with hash 1430462795, now seen corresponding path program 56 times [2020-12-22 10:34:01,125 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:01,125 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [397393816] [2020-12-22 10:34:01,125 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:01,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:01,287 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:01,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [397393816] [2020-12-22 10:34:01,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183626919] [2020-12-22 10:34:01,288 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 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 10:34:01,357 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:01,357 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:01,359 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:01,360 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:01,404 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:01,404 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:01,405 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 10:34:01,405 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872713479] [2020-12-22 10:34:01,405 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:01,405 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:01,406 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:01,406 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:01,406 INFO L87 Difference]: Start difference. First operand 63 states and 155 transitions. Second operand 18 states. [2020-12-22 10:34:01,790 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:01,790 INFO L93 Difference]: Finished difference Result 110 states and 251 transitions. [2020-12-22 10:34:01,791 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:01,791 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 10:34:01,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:01,792 INFO L225 Difference]: With dead ends: 110 [2020-12-22 10:34:01,792 INFO L226 Difference]: Without dead ends: 104 [2020-12-22 10:34:01,792 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 266 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=369, Invalid=963, Unknown=0, NotChecked=0, Total=1332 [2020-12-22 10:34:01,793 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 104 states. [2020-12-22 10:34:01,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 104 to 65. [2020-12-22 10:34:01,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 65 states. [2020-12-22 10:34:01,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 161 transitions. [2020-12-22 10:34:01,797 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 161 transitions. Word has length 21 [2020-12-22 10:34:01,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:01,797 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 161 transitions. [2020-12-22 10:34:01,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:01,797 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 161 transitions. [2020-12-22 10:34:01,798 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:01,798 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:01,798 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:02,012 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-12-22 10:34:02,013 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:02,013 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:02,014 INFO L82 PathProgramCache]: Analyzing trace with hash -463633469, now seen corresponding path program 57 times [2020-12-22 10:34:02,014 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:02,014 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [697835902] [2020-12-22 10:34:02,015 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:02,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:02,177 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 10:34:02,177 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [697835902] [2020-12-22 10:34:02,178 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57498251] [2020-12-22 10:34:02,178 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 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 10:34:02,236 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 10:34:02,236 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:02,237 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:02,238 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:02,274 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 10:34:02,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:02,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 10:34:02,274 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1686722749] [2020-12-22 10:34:02,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:02,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:02,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:02,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:02,275 INFO L87 Difference]: Start difference. First operand 65 states and 161 transitions. Second operand 18 states. [2020-12-22 10:34:02,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:02,705 INFO L93 Difference]: Finished difference Result 108 states and 249 transitions. [2020-12-22 10:34:02,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:02,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 10:34:02,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:02,707 INFO L225 Difference]: With dead ends: 108 [2020-12-22 10:34:02,707 INFO L226 Difference]: Without dead ends: 102 [2020-12-22 10:34:02,707 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=410, Invalid=1072, Unknown=0, NotChecked=0, Total=1482 [2020-12-22 10:34:02,707 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-12-22 10:34:02,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 67. [2020-12-22 10:34:02,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 67 states. [2020-12-22 10:34:02,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 167 transitions. [2020-12-22 10:34:02,710 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 167 transitions. Word has length 21 [2020-12-22 10:34:02,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:02,710 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 167 transitions. [2020-12-22 10:34:02,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:02,711 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 167 transitions. [2020-12-22 10:34:02,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:02,711 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:02,711 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:02,925 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-12-22 10:34:02,926 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:02,926 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:02,926 INFO L82 PathProgramCache]: Analyzing trace with hash -1591860165, now seen corresponding path program 58 times [2020-12-22 10:34:02,927 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:02,927 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566055219] [2020-12-22 10:34:02,927 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:02,935 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:03,089 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 10:34:03,089 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566055219] [2020-12-22 10:34:03,090 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1385561029] [2020-12-22 10:34:03,090 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 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 10:34:03,146 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:03,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:03,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:03,148 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:03,192 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 10:34:03,192 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:03,192 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 10:34:03,192 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2115734751] [2020-12-22 10:34:03,193 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:03,193 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:03,193 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:03,193 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=247, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:03,194 INFO L87 Difference]: Start difference. First operand 67 states and 167 transitions. Second operand 18 states. [2020-12-22 10:34:03,698 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:03,698 INFO L93 Difference]: Finished difference Result 106 states and 247 transitions. [2020-12-22 10:34:03,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:03,699 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 10:34:03,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:03,700 INFO L225 Difference]: With dead ends: 106 [2020-12-22 10:34:03,700 INFO L226 Difference]: Without dead ends: 100 [2020-12-22 10:34:03,700 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 384 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=467, Invalid=1173, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:34:03,701 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-12-22 10:34:03,703 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 69. [2020-12-22 10:34:03,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 69 states. [2020-12-22 10:34:03,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-12-22 10:34:03,704 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 21 [2020-12-22 10:34:03,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:03,704 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-12-22 10:34:03,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:03,704 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-12-22 10:34:03,705 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:03,705 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:03,705 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:03,918 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:03,919 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:03,919 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:03,919 INFO L82 PathProgramCache]: Analyzing trace with hash -1677950285, now seen corresponding path program 59 times [2020-12-22 10:34:03,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:03,920 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1718933733] [2020-12-22 10:34:03,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:03,928 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:04,074 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 10:34:04,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1718933733] [2020-12-22 10:34:04,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [537440879] [2020-12-22 10:34:04,075 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 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 10:34:04,132 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 10:34:04,132 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:04,133 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:04,134 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:04,177 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 10:34:04,177 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:04,177 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 10:34:04,177 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1930455838] [2020-12-22 10:34:04,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:04,178 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:04,178 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:04,178 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=243, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:04,179 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand 18 states. [2020-12-22 10:34:04,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:04,713 INFO L93 Difference]: Finished difference Result 104 states and 245 transitions. [2020-12-22 10:34:04,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:04,714 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 10:34:04,714 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:04,715 INFO L225 Difference]: With dead ends: 104 [2020-12-22 10:34:04,715 INFO L226 Difference]: Without dead ends: 98 [2020-12-22 10:34:04,716 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 452 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=540, Invalid=1266, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:34:04,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-12-22 10:34:04,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 71. [2020-12-22 10:34:04,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 10:34:04,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 179 transitions. [2020-12-22 10:34:04,719 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 179 transitions. Word has length 21 [2020-12-22 10:34:04,719 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:04,719 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 179 transitions. [2020-12-22 10:34:04,719 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:04,719 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 179 transitions. [2020-12-22 10:34:04,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:04,719 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:04,720 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:04,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:04,935 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:04,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:04,936 INFO L82 PathProgramCache]: Analyzing trace with hash -1655693525, now seen corresponding path program 60 times [2020-12-22 10:34:04,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:04,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1178559299] [2020-12-22 10:34:04,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:04,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:05,076 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 10:34:05,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1178559299] [2020-12-22 10:34:05,076 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [307500696] [2020-12-22 10:34:05,077 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 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 10:34:05,142 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 10:34:05,142 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:05,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:05,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:05,180 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 10:34:05,180 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:05,180 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 10:34:05,181 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1461251837] [2020-12-22 10:34:05,181 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:05,182 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:05,182 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:05,182 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:05,184 INFO L87 Difference]: Start difference. First operand 71 states and 179 transitions. Second operand 18 states. [2020-12-22 10:34:05,704 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:05,704 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-12-22 10:34:05,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:05,705 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 10:34:05,705 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:05,708 INFO L225 Difference]: With dead ends: 121 [2020-12-22 10:34:05,708 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 10:34:05,709 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 524 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=629, Invalid=1351, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:34:05,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 10:34:05,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 76. [2020-12-22 10:34:05,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 10:34:05,711 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 197 transitions. [2020-12-22 10:34:05,711 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 197 transitions. Word has length 21 [2020-12-22 10:34:05,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:05,712 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 197 transitions. [2020-12-22 10:34:05,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:05,712 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 197 transitions. [2020-12-22 10:34:05,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-12-22 10:34:05,712 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:05,712 INFO L422 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:05,915 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:05,916 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:05,916 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:05,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1655671205, now seen corresponding path program 61 times [2020-12-22 10:34:05,917 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:05,917 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [276648557] [2020-12-22 10:34:05,917 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:05,927 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:06,038 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 10:34:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [276648557] [2020-12-22 10:34:06,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [742827623] [2020-12-22 10:34:06,039 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 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 10:34:06,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:06,104 INFO L263 TraceCheckSpWp]: Trace formula consists of 145 conjuncts, 19 conjunts are in the unsatisfiable core [2020-12-22 10:34:06,105 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:06,148 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 10:34:06,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:06,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-12-22 10:34:06,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2030244102] [2020-12-22 10:34:06,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-12-22 10:34:06,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:06,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-12-22 10:34:06,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-12-22 10:34:06,150 INFO L87 Difference]: Start difference. First operand 76 states and 197 transitions. Second operand 18 states. [2020-12-22 10:34:06,868 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:06,869 INFO L93 Difference]: Finished difference Result 104 states and 253 transitions. [2020-12-22 10:34:06,869 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:06,869 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 21 [2020-12-22 10:34:06,870 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:06,870 INFO L225 Difference]: With dead ends: 104 [2020-12-22 10:34:06,870 INFO L226 Difference]: Without dead ends: 93 [2020-12-22 10:34:06,871 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 63 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=640, Invalid=1430, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 10:34:06,871 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-12-22 10:34:06,873 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 58. [2020-12-22 10:34:06,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 58 states. [2020-12-22 10:34:06,873 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-12-22 10:34:06,874 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 21 [2020-12-22 10:34:06,874 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:06,874 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-12-22 10:34:06,874 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-12-22 10:34:06,874 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-12-22 10:34:06,875 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:06,875 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:06,875 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:07,082 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:07,083 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:07,083 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:07,083 INFO L82 PathProgramCache]: Analyzing trace with hash -985011240, now seen corresponding path program 62 times [2020-12-22 10:34:07,084 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:07,084 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1609591591] [2020-12-22 10:34:07,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:07,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:07,302 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 10:34:07,302 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1609591591] [2020-12-22 10:34:07,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [187116820] [2020-12-22 10:34:07,303 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 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 10:34:07,363 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:07,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:07,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:07,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:07,431 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 10:34:07,431 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:07,431 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-22 10:34:07,431 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1008365399] [2020-12-22 10:34:07,432 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:07,432 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:07,432 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:07,432 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=95, Invalid=285, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:07,433 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand 20 states. [2020-12-22 10:34:07,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:07,809 INFO L93 Difference]: Finished difference Result 81 states and 187 transitions. [2020-12-22 10:34:07,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-12-22 10:34:07,810 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-22 10:34:07,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:07,811 INFO L225 Difference]: With dead ends: 81 [2020-12-22 10:34:07,811 INFO L226 Difference]: Without dead ends: 75 [2020-12-22 10:34:07,811 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 195 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=396, Invalid=864, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:34:07,812 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-12-22 10:34:07,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 62. [2020-12-22 10:34:07,814 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 62 states. [2020-12-22 10:34:07,814 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 149 transitions. [2020-12-22 10:34:07,814 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 149 transitions. Word has length 22 [2020-12-22 10:34:07,814 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:07,815 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 149 transitions. [2020-12-22 10:34:07,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:07,815 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 149 transitions. [2020-12-22 10:34:07,815 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:07,815 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:07,815 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:08,026 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-12-22 10:34:08,027 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:08,028 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:08,028 INFO L82 PathProgramCache]: Analyzing trace with hash -1090086938, now seen corresponding path program 63 times [2020-12-22 10:34:08,028 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:08,029 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [575798063] [2020-12-22 10:34:08,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:08,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:08,217 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 10:34:08,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [575798063] [2020-12-22 10:34:08,217 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [479805527] [2020-12-22 10:34:08,218 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 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 10:34:08,299 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 10:34:08,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:08,301 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:08,302 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:08,346 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 10:34:08,346 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:08,346 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:08,347 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [559190048] [2020-12-22 10:34:08,347 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:08,347 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:08,348 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:08,348 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=257, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:08,348 INFO L87 Difference]: Start difference. First operand 62 states and 149 transitions. Second operand 19 states. [2020-12-22 10:34:08,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:08,687 INFO L93 Difference]: Finished difference Result 122 states and 273 transitions. [2020-12-22 10:34:08,688 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-12-22 10:34:08,688 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:08,688 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:08,689 INFO L225 Difference]: With dead ends: 122 [2020-12-22 10:34:08,689 INFO L226 Difference]: Without dead ends: 116 [2020-12-22 10:34:08,689 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=344, Invalid=778, Unknown=0, NotChecked=0, Total=1122 [2020-12-22 10:34:08,689 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-12-22 10:34:08,691 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 66. [2020-12-22 10:34:08,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-12-22 10:34:08,691 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-12-22 10:34:08,691 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 22 [2020-12-22 10:34:08,691 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:08,691 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-12-22 10:34:08,692 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:08,692 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-12-22 10:34:08,692 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:08,692 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:08,692 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:08,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:08,896 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:08,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:08,896 INFO L82 PathProgramCache]: Analyzing trace with hash -1665466786, now seen corresponding path program 64 times [2020-12-22 10:34:08,897 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:08,897 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [961756460] [2020-12-22 10:34:08,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:08,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:09,077 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 10:34:09,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [961756460] [2020-12-22 10:34:09,078 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573415821] [2020-12-22 10:34:09,078 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 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 10:34:09,143 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:09,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:09,144 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:09,145 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:09,189 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 10:34:09,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:09,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:09,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059931458] [2020-12-22 10:34:09,190 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:09,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:09,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:09,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=268, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:09,190 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand 19 states. [2020-12-22 10:34:09,570 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:09,570 INFO L93 Difference]: Finished difference Result 117 states and 265 transitions. [2020-12-22 10:34:09,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:34:09,571 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:09,571 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:09,572 INFO L225 Difference]: With dead ends: 117 [2020-12-22 10:34:09,572 INFO L226 Difference]: Without dead ends: 111 [2020-12-22 10:34:09,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 218 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=354, Invalid=906, Unknown=0, NotChecked=0, Total=1260 [2020-12-22 10:34:09,573 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-12-22 10:34:09,575 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 68. [2020-12-22 10:34:09,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:34:09,576 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 167 transitions. [2020-12-22 10:34:09,576 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 167 transitions. Word has length 22 [2020-12-22 10:34:09,576 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:09,576 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 167 transitions. [2020-12-22 10:34:09,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:09,576 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 167 transitions. [2020-12-22 10:34:09,577 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:09,577 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:09,577 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:09,792 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-12-22 10:34:09,793 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:09,793 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:09,794 INFO L82 PathProgramCache]: Analyzing trace with hash -825842986, now seen corresponding path program 65 times [2020-12-22 10:34:09,794 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:09,794 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1608468293] [2020-12-22 10:34:09,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:09,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:09,961 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 10:34:09,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1608468293] [2020-12-22 10:34:09,962 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1441025832] [2020-12-22 10:34:09,962 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 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 10:34:10,021 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-12-22 10:34:10,022 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:10,023 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:10,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:10,065 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 10:34:10,066 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:10,066 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:10,066 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2081854556] [2020-12-22 10:34:10,067 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:10,067 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:10,067 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:10,068 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=275, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:10,068 INFO L87 Difference]: Start difference. First operand 68 states and 167 transitions. Second operand 19 states. [2020-12-22 10:34:10,504 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:10,504 INFO L93 Difference]: Finished difference Result 115 states and 263 transitions. [2020-12-22 10:34:10,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:10,505 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:10,505 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:10,506 INFO L225 Difference]: With dead ends: 115 [2020-12-22 10:34:10,506 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 10:34:10,507 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 56 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=380, Invalid=1026, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:34:10,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 10:34:10,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 70. [2020-12-22 10:34:10,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 70 states. [2020-12-22 10:34:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 173 transitions. [2020-12-22 10:34:10,510 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 173 transitions. Word has length 22 [2020-12-22 10:34:10,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:10,510 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 173 transitions. [2020-12-22 10:34:10,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:10,510 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 173 transitions. [2020-12-22 10:34:10,510 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:10,510 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:10,511 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:10,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:10,716 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:10,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:10,716 INFO L82 PathProgramCache]: Analyzing trace with hash 1575028046, now seen corresponding path program 66 times [2020-12-22 10:34:10,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:10,717 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949058305] [2020-12-22 10:34:10,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:10,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:10,889 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 10:34:10,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949058305] [2020-12-22 10:34:10,890 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1870043965] [2020-12-22 10:34:10,890 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 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 10:34:10,951 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-12-22 10:34:10,951 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:10,952 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:10,953 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:10,994 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 10:34:10,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:10,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:10,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1319976782] [2020-12-22 10:34:10,995 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:10,995 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:10,995 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:10,995 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=278, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:10,996 INFO L87 Difference]: Start difference. First operand 70 states and 173 transitions. Second operand 19 states. [2020-12-22 10:34:11,484 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:11,484 INFO L93 Difference]: Finished difference Result 113 states and 261 transitions. [2020-12-22 10:34:11,485 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:11,485 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:11,485 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:11,485 INFO L225 Difference]: With dead ends: 113 [2020-12-22 10:34:11,486 INFO L226 Difference]: Without dead ends: 107 [2020-12-22 10:34:11,486 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 320 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=422, Invalid=1138, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:34:11,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 107 states. [2020-12-22 10:34:11,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 107 to 72. [2020-12-22 10:34:11,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 10:34:11,489 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 179 transitions. [2020-12-22 10:34:11,489 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 179 transitions. Word has length 22 [2020-12-22 10:34:11,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:11,489 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 179 transitions. [2020-12-22 10:34:11,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:11,489 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 179 transitions. [2020-12-22 10:34:11,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:11,490 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:11,490 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:11,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-12-22 10:34:11,706 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:11,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:11,706 INFO L82 PathProgramCache]: Analyzing trace with hash 446801350, now seen corresponding path program 67 times [2020-12-22 10:34:11,707 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:11,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149762407] [2020-12-22 10:34:11,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:11,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:11,852 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 10:34:11,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149762407] [2020-12-22 10:34:11,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [481581198] [2020-12-22 10:34:11,852 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 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 10:34:11,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:11,911 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:11,912 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:11,956 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 10:34:11,956 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:11,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:11,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487693576] [2020-12-22 10:34:11,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:11,957 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:11,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:11,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=277, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:11,958 INFO L87 Difference]: Start difference. First operand 72 states and 179 transitions. Second operand 19 states. [2020-12-22 10:34:12,511 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:12,511 INFO L93 Difference]: Finished difference Result 111 states and 259 transitions. [2020-12-22 10:34:12,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:12,512 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:12,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:12,513 INFO L225 Difference]: With dead ends: 111 [2020-12-22 10:34:12,513 INFO L226 Difference]: Without dead ends: 105 [2020-12-22 10:34:12,514 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 377 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=480, Invalid=1242, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:34:12,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-12-22 10:34:12,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 74. [2020-12-22 10:34:12,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 10:34:12,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 185 transitions. [2020-12-22 10:34:12,517 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 185 transitions. Word has length 22 [2020-12-22 10:34:12,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:12,517 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 185 transitions. [2020-12-22 10:34:12,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:12,517 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 185 transitions. [2020-12-22 10:34:12,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:12,517 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:12,517 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:12,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:12,718 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:12,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:12,719 INFO L82 PathProgramCache]: Analyzing trace with hash 360711230, now seen corresponding path program 68 times [2020-12-22 10:34:12,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:12,720 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1071790872] [2020-12-22 10:34:12,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:12,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:12,856 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 10:34:12,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1071790872] [2020-12-22 10:34:12,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2133071257] [2020-12-22 10:34:12,857 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 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 10:34:12,925 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:12,925 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:12,926 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:12,927 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:12,965 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 10:34:12,966 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:12,966 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:12,966 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2057034515] [2020-12-22 10:34:12,966 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:12,966 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:12,967 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:12,967 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=272, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:12,967 INFO L87 Difference]: Start difference. First operand 74 states and 185 transitions. Second operand 19 states. [2020-12-22 10:34:13,585 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:13,586 INFO L93 Difference]: Finished difference Result 109 states and 257 transitions. [2020-12-22 10:34:13,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:13,586 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:13,586 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:13,587 INFO L225 Difference]: With dead ends: 109 [2020-12-22 10:34:13,587 INFO L226 Difference]: Without dead ends: 103 [2020-12-22 10:34:13,587 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 438 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=554, Invalid=1338, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:34:13,588 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-12-22 10:34:13,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 76. [2020-12-22 10:34:13,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 10:34:13,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 191 transitions. [2020-12-22 10:34:13,589 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 191 transitions. Word has length 22 [2020-12-22 10:34:13,589 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:13,589 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 191 transitions. [2020-12-22 10:34:13,589 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:13,590 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 191 transitions. [2020-12-22 10:34:13,590 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:13,590 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:13,590 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:13,790 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:13,791 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:13,791 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:13,791 INFO L82 PathProgramCache]: Analyzing trace with hash 382967990, now seen corresponding path program 69 times [2020-12-22 10:34:13,791 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:13,791 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1459681782] [2020-12-22 10:34:13,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:13,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:13,940 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 10:34:13,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1459681782] [2020-12-22 10:34:13,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1219823044] [2020-12-22 10:34:13,941 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 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 10:34:14,004 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-12-22 10:34:14,004 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:14,005 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:14,006 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:14,053 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 10:34:14,054 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:14,054 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-12-22 10:34:14,054 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1550077766] [2020-12-22 10:34:14,054 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-12-22 10:34:14,054 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:14,055 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-12-22 10:34:14,055 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2020-12-22 10:34:14,055 INFO L87 Difference]: Start difference. First operand 76 states and 191 transitions. Second operand 19 states. [2020-12-22 10:34:14,673 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:14,673 INFO L93 Difference]: Finished difference Result 127 states and 303 transitions. [2020-12-22 10:34:14,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:14,680 INFO L78 Accepts]: Start accepts. Automaton has 19 states. Word has length 22 [2020-12-22 10:34:14,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:14,681 INFO L225 Difference]: With dead ends: 127 [2020-12-22 10:34:14,681 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 10:34:14,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=644, Invalid=1426, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 10:34:14,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 10:34:14,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 81. [2020-12-22 10:34:14,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 81 states. [2020-12-22 10:34:14,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 209 transitions. [2020-12-22 10:34:14,684 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 209 transitions. Word has length 22 [2020-12-22 10:34:14,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:14,685 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 209 transitions. [2020-12-22 10:34:14,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 19 states. [2020-12-22 10:34:14,685 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 209 transitions. [2020-12-22 10:34:14,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-12-22 10:34:14,685 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:14,685 INFO L422 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:14,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-12-22 10:34:14,901 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:14,901 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:14,901 INFO L82 PathProgramCache]: Analyzing trace with hash 382990310, now seen corresponding path program 70 times [2020-12-22 10:34:14,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:14,902 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724903776] [2020-12-22 10:34:14,902 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:14,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:15,058 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 10:34:15,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724903776] [2020-12-22 10:34:15,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [661914805] [2020-12-22 10:34:15,058 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 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 10:34:15,119 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:15,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:15,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 150 conjuncts, 20 conjunts are in the unsatisfiable core [2020-12-22 10:34:15,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:15,174 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 10:34:15,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:15,174 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 18 [2020-12-22 10:34:15,174 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1718769317] [2020-12-22 10:34:15,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:15,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:15,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:15,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=298, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:15,176 INFO L87 Difference]: Start difference. First operand 81 states and 209 transitions. Second operand 20 states. [2020-12-22 10:34:16,085 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:16,086 INFO L93 Difference]: Finished difference Result 125 states and 299 transitions. [2020-12-22 10:34:16,086 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:34:16,086 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 22 [2020-12-22 10:34:16,086 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:16,087 INFO L225 Difference]: With dead ends: 125 [2020-12-22 10:34:16,087 INFO L226 Difference]: Without dead ends: 112 [2020-12-22 10:34:16,088 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 19 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 639 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=767, Invalid=1783, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 10:34:16,088 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-12-22 10:34:16,089 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 80. [2020-12-22 10:34:16,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 10:34:16,089 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-12-22 10:34:16,089 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 22 [2020-12-22 10:34:16,090 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:16,090 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-12-22 10:34:16,090 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:16,090 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-12-22 10:34:16,090 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:16,090 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:16,091 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:16,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:16,304 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:16,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:16,304 INFO L82 PathProgramCache]: Analyzing trace with hash 860606391, now seen corresponding path program 71 times [2020-12-22 10:34:16,305 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:16,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1830916579] [2020-12-22 10:34:16,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:16,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:16,529 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 10:34:16,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1830916579] [2020-12-22 10:34:16,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567396678] [2020-12-22 10:34:16,530 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 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 10:34:16,591 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 10:34:16,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:16,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:16,593 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:16,639 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 10:34:16,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:16,640 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:16,640 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864272400] [2020-12-22 10:34:16,640 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:16,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:16,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:16,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:16,641 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-12-22 10:34:17,065 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:17,065 INFO L93 Difference]: Finished difference Result 120 states and 283 transitions. [2020-12-22 10:34:17,066 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:17,066 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:17,066 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:17,067 INFO L225 Difference]: With dead ends: 120 [2020-12-22 10:34:17,067 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 10:34:17,067 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 57 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 237 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=401, Invalid=1005, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:34:17,069 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 10:34:17,071 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 80. [2020-12-22 10:34:17,072 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 10:34:17,072 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-12-22 10:34:17,072 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2020-12-22 10:34:17,072 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:17,072 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-12-22 10:34:17,072 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:17,073 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-12-22 10:34:17,073 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:17,073 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:17,073 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:17,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:17,287 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:17,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:17,287 INFO L82 PathProgramCache]: Analyzing trace with hash 285226543, now seen corresponding path program 72 times [2020-12-22 10:34:17,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:17,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310195453] [2020-12-22 10:34:17,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:17,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:17,485 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 10:34:17,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310195453] [2020-12-22 10:34:17,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1174506726] [2020-12-22 10:34:17,485 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 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 10:34:17,550 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 10:34:17,550 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:17,551 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:17,552 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:17,600 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 10:34:17,601 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:17,601 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:17,601 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1683634251] [2020-12-22 10:34:17,601 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:17,601 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:17,602 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:17,602 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:17,602 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-12-22 10:34:18,072 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:18,072 INFO L93 Difference]: Finished difference Result 131 states and 305 transitions. [2020-12-22 10:34:18,073 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:18,073 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:18,073 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:18,074 INFO L225 Difference]: With dead ends: 131 [2020-12-22 10:34:18,074 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 10:34:18,075 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 331 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=452, Invalid=1188, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:34:18,075 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 10:34:18,077 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 80. [2020-12-22 10:34:18,077 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 10:34:18,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-12-22 10:34:18,077 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2020-12-22 10:34:18,078 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:18,078 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-12-22 10:34:18,078 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:18,078 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-12-22 10:34:18,078 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:18,078 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:18,078 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:18,281 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-12-22 10:34:18,282 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:18,283 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:18,283 INFO L82 PathProgramCache]: Analyzing trace with hash 1124850343, now seen corresponding path program 73 times [2020-12-22 10:34:18,284 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:18,284 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1499297631] [2020-12-22 10:34:18,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:18,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:18,480 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 10:34:18,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1499297631] [2020-12-22 10:34:18,480 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [476138748] [2020-12-22 10:34:18,480 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 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 10:34:18,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:18,538 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:18,538 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:18,588 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 10:34:18,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:18,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:18,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [114014963] [2020-12-22 10:34:18,590 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:18,590 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:18,591 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:18,591 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:18,591 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-12-22 10:34:19,135 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:19,135 INFO L93 Difference]: Finished difference Result 127 states and 297 transitions. [2020-12-22 10:34:19,136 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:19,136 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:19,136 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:19,137 INFO L225 Difference]: With dead ends: 127 [2020-12-22 10:34:19,137 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 10:34:19,138 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 391 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=491, Invalid=1315, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:34:19,139 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 10:34:19,141 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 80. [2020-12-22 10:34:19,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 10:34:19,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-12-22 10:34:19,141 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2020-12-22 10:34:19,142 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:19,142 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-12-22 10:34:19,142 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:19,142 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-12-22 10:34:19,142 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:19,142 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:19,142 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:19,346 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:19,347 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:19,347 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:19,348 INFO L82 PathProgramCache]: Analyzing trace with hash -769245921, now seen corresponding path program 74 times [2020-12-22 10:34:19,348 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:19,348 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [242312319] [2020-12-22 10:34:19,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:19,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:19,530 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 10:34:19,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [242312319] [2020-12-22 10:34:19,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235765323] [2020-12-22 10:34:19,531 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 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 10:34:19,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:19,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:19,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:19,603 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:19,647 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 10:34:19,647 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:19,647 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:19,647 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1112319725] [2020-12-22 10:34:19,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:19,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:19,648 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:19,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=310, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:19,649 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-12-22 10:34:20,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:20,198 INFO L93 Difference]: Finished difference Result 123 states and 289 transitions. [2020-12-22 10:34:20,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:20,199 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:20,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:20,200 INFO L225 Difference]: With dead ends: 123 [2020-12-22 10:34:20,200 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 10:34:20,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 461 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=546, Invalid=1434, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:34:20,201 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 10:34:20,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-12-22 10:34:20,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 10:34:20,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-12-22 10:34:20,203 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2020-12-22 10:34:20,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:20,203 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-12-22 10:34:20,203 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:20,203 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-12-22 10:34:20,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:20,203 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:20,203 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:20,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-12-22 10:34:20,404 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:20,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:20,405 INFO L82 PathProgramCache]: Analyzing trace with hash -1897472617, now seen corresponding path program 75 times [2020-12-22 10:34:20,405 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:20,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [483299095] [2020-12-22 10:34:20,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:20,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:20,594 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 10:34:20,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [483299095] [2020-12-22 10:34:20,595 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [303103921] [2020-12-22 10:34:20,595 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 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 10:34:20,661 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 10:34:20,662 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:20,663 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 10:34:20,664 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:20,709 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:20,710 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:20,710 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:20,710 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [32841035] [2020-12-22 10:34:20,711 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:20,711 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:20,711 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:20,711 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=308, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:20,711 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-12-22 10:34:21,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:21,372 INFO L93 Difference]: Finished difference Result 119 states and 281 transitions. [2020-12-22 10:34:21,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:21,372 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:21,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:21,374 INFO L225 Difference]: With dead ends: 119 [2020-12-22 10:34:21,374 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 10:34:21,374 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 535 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=617, Invalid=1545, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 10:34:21,375 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 10:34:21,377 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 80. [2020-12-22 10:34:21,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 10:34:21,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-12-22 10:34:21,377 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2020-12-22 10:34:21,377 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:21,377 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-12-22 10:34:21,378 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:21,378 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-12-22 10:34:21,378 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:21,378 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:21,378 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:21,590 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-12-22 10:34:21,591 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:21,591 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:21,591 INFO L82 PathProgramCache]: Analyzing trace with hash -1983562737, now seen corresponding path program 76 times [2020-12-22 10:34:21,592 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:21,592 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744120242] [2020-12-22 10:34:21,592 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:21,600 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:21,772 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 10:34:21,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744120242] [2020-12-22 10:34:21,773 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [544467577] [2020-12-22 10:34:21,773 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 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 10:34:21,831 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:21,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:21,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:21,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:21,875 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:21,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:21,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:21,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1509225175] [2020-12-22 10:34:21,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:21,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:21,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:21,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=302, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:21,877 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-12-22 10:34:22,576 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:22,576 INFO L93 Difference]: Finished difference Result 115 states and 273 transitions. [2020-12-22 10:34:22,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:34:22,579 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:22,579 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:22,580 INFO L225 Difference]: With dead ends: 115 [2020-12-22 10:34:22,580 INFO L226 Difference]: Without dead ends: 109 [2020-12-22 10:34:22,580 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 613 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=704, Invalid=1648, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 10:34:22,580 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 109 states. [2020-12-22 10:34:22,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 109 to 80. [2020-12-22 10:34:22,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 10:34:22,582 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 203 transitions. [2020-12-22 10:34:22,582 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 203 transitions. Word has length 23 [2020-12-22 10:34:22,582 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:22,582 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 203 transitions. [2020-12-22 10:34:22,582 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:22,582 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 203 transitions. [2020-12-22 10:34:22,583 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:22,583 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:22,583 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:22,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-12-22 10:34:22,784 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:22,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:22,785 INFO L82 PathProgramCache]: Analyzing trace with hash -1961305977, now seen corresponding path program 77 times [2020-12-22 10:34:22,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:22,785 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52667952] [2020-12-22 10:34:22,785 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:22,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:22,949 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 10:34:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52667952] [2020-12-22 10:34:22,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100347693] [2020-12-22 10:34:22,950 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 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 10:34:23,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 10:34:23,014 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:23,015 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:23,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:23,063 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 10:34:23,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:23,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-12-22 10:34:23,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364036227] [2020-12-22 10:34:23,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-12-22 10:34:23,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:23,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-12-22 10:34:23,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=292, Unknown=0, NotChecked=0, Total=380 [2020-12-22 10:34:23,065 INFO L87 Difference]: Start difference. First operand 80 states and 203 transitions. Second operand 20 states. [2020-12-22 10:34:23,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:23,818 INFO L93 Difference]: Finished difference Result 131 states and 313 transitions. [2020-12-22 10:34:23,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:34:23,819 INFO L78 Accepts]: Start accepts. Automaton has 20 states. Word has length 23 [2020-12-22 10:34:23,819 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:23,820 INFO L225 Difference]: With dead ends: 131 [2020-12-22 10:34:23,820 INFO L226 Difference]: Without dead ends: 125 [2020-12-22 10:34:23,821 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 695 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=807, Invalid=1743, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 10:34:23,821 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-12-22 10:34:23,824 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 84. [2020-12-22 10:34:23,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 10:34:23,824 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 217 transitions. [2020-12-22 10:34:23,824 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 217 transitions. Word has length 23 [2020-12-22 10:34:23,825 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:23,825 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 217 transitions. [2020-12-22 10:34:23,825 INFO L482 AbstractCegarLoop]: Interpolant automaton has 20 states. [2020-12-22 10:34:23,825 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 217 transitions. [2020-12-22 10:34:23,825 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-12-22 10:34:23,825 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:23,826 INFO L422 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:24,040 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:24,041 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:24,041 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:24,042 INFO L82 PathProgramCache]: Analyzing trace with hash -1961283657, now seen corresponding path program 78 times [2020-12-22 10:34:24,042 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:24,042 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1772868843] [2020-12-22 10:34:24,042 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:24,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:24,235 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:24,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1772868843] [2020-12-22 10:34:24,236 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [690966828] [2020-12-22 10:34:24,236 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 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 10:34:24,303 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 10:34:24,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:24,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 155 conjuncts, 21 conjunts are in the unsatisfiable core [2020-12-22 10:34:24,305 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:24,366 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 10:34:24,366 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:24,366 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-22 10:34:24,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1499863036] [2020-12-22 10:34:24,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:24,367 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:24,367 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:24,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:24,368 INFO L87 Difference]: Start difference. First operand 84 states and 217 transitions. Second operand 21 states. [2020-12-22 10:34:25,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:25,381 INFO L93 Difference]: Finished difference Result 126 states and 302 transitions. [2020-12-22 10:34:25,382 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 10:34:25,382 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 23 [2020-12-22 10:34:25,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:25,383 INFO L225 Difference]: With dead ends: 126 [2020-12-22 10:34:25,383 INFO L226 Difference]: Without dead ends: 113 [2020-12-22 10:34:25,384 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 20 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 751 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=859, Invalid=2003, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 10:34:25,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-12-22 10:34:25,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 64. [2020-12-22 10:34:25,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-12-22 10:34:25,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 155 transitions. [2020-12-22 10:34:25,387 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 155 transitions. Word has length 23 [2020-12-22 10:34:25,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:25,387 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 155 transitions. [2020-12-22 10:34:25,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:25,387 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 155 transitions. [2020-12-22 10:34:25,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:25,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:25,388 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:25,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:25,589 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:25,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:25,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1702981252, now seen corresponding path program 79 times [2020-12-22 10:34:25,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:25,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1411175489] [2020-12-22 10:34:25,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:25,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:25,858 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 10:34:25,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1411175489] [2020-12-22 10:34:25,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2123676364] [2020-12-22 10:34:25,858 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 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 10:34:25,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:25,914 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:25,915 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:25,981 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 10:34:25,981 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:25,981 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 20 [2020-12-22 10:34:25,981 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414774233] [2020-12-22 10:34:25,982 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:25,982 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:25,982 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:25,982 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=115, Invalid=347, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:25,982 INFO L87 Difference]: Start difference. First operand 64 states and 155 transitions. Second operand 22 states. [2020-12-22 10:34:26,467 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:26,467 INFO L93 Difference]: Finished difference Result 89 states and 205 transitions. [2020-12-22 10:34:26,468 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-12-22 10:34:26,468 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 24 [2020-12-22 10:34:26,468 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:26,469 INFO L225 Difference]: With dead ends: 89 [2020-12-22 10:34:26,469 INFO L226 Difference]: Without dead ends: 83 [2020-12-22 10:34:26,469 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 59 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 247 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=489, Invalid=1071, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:34:26,470 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 83 states. [2020-12-22 10:34:26,471 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 83 to 68. [2020-12-22 10:34:26,471 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 68 states. [2020-12-22 10:34:26,471 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 163 transitions. [2020-12-22 10:34:26,471 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 163 transitions. Word has length 24 [2020-12-22 10:34:26,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:26,471 INFO L481 AbstractCegarLoop]: Abstraction has 68 states and 163 transitions. [2020-12-22 10:34:26,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:26,471 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 163 transitions. [2020-12-22 10:34:26,472 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:26,472 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:26,472 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:26,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:26,672 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:26,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:26,673 INFO L82 PathProgramCache]: Analyzing trace with hash 398488074, now seen corresponding path program 80 times [2020-12-22 10:34:26,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:26,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2024847725] [2020-12-22 10:34:26,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:26,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:26,937 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 10:34:26,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2024847725] [2020-12-22 10:34:26,937 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743357750] [2020-12-22 10:34:26,937 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 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 10:34:27,000 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:27,000 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:27,001 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:27,002 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:27,060 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 10:34:27,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:27,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:27,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [753153541] [2020-12-22 10:34:27,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:27,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:27,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:27,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:27,062 INFO L87 Difference]: Start difference. First operand 68 states and 163 transitions. Second operand 21 states. [2020-12-22 10:34:27,477 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:27,477 INFO L93 Difference]: Finished difference Result 134 states and 299 transitions. [2020-12-22 10:34:27,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-12-22 10:34:27,478 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:27,478 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:27,479 INFO L225 Difference]: With dead ends: 134 [2020-12-22 10:34:27,479 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 10:34:27,480 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 222 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=431, Invalid=975, Unknown=0, NotChecked=0, Total=1406 [2020-12-22 10:34:27,480 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 10:34:27,482 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 72. [2020-12-22 10:34:27,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 72 states. [2020-12-22 10:34:27,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 175 transitions. [2020-12-22 10:34:27,483 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 175 transitions. Word has length 24 [2020-12-22 10:34:27,483 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:27,483 INFO L481 AbstractCegarLoop]: Abstraction has 72 states and 175 transitions. [2020-12-22 10:34:27,483 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:27,483 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 175 transitions. [2020-12-22 10:34:27,484 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:27,484 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:27,484 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:27,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:27,700 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:27,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:27,700 INFO L82 PathProgramCache]: Analyzing trace with hash 1509235330, now seen corresponding path program 81 times [2020-12-22 10:34:27,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:27,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1029194158] [2020-12-22 10:34:27,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:27,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:27,945 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 10:34:27,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1029194158] [2020-12-22 10:34:27,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213157208] [2020-12-22 10:34:27,946 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:34:28,020 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 10:34:28,021 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:28,022 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:28,023 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:28,083 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 10:34:28,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:28,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:28,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [569941098] [2020-12-22 10:34:28,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:28,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:28,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:28,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:28,085 INFO L87 Difference]: Start difference. First operand 72 states and 175 transitions. Second operand 21 states. [2020-12-22 10:34:28,587 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:28,587 INFO L93 Difference]: Finished difference Result 129 states and 291 transitions. [2020-12-22 10:34:28,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:28,588 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:28,588 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:28,589 INFO L225 Difference]: With dead ends: 129 [2020-12-22 10:34:28,589 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 10:34:28,589 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 273 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=1121, Unknown=0, NotChecked=0, Total=1560 [2020-12-22 10:34:28,590 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 10:34:28,592 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 74. [2020-12-22 10:34:28,593 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-12-22 10:34:28,593 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-12-22 10:34:28,593 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 24 [2020-12-22 10:34:28,594 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:28,594 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-12-22 10:34:28,594 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:28,594 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-12-22 10:34:28,594 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:28,594 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:28,594 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:28,796 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-12-22 10:34:28,797 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:28,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:28,798 INFO L82 PathProgramCache]: Analyzing trace with hash 933855482, now seen corresponding path program 82 times [2020-12-22 10:34:28,798 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:28,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737577218] [2020-12-22 10:34:28,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:28,807 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:29,041 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 10:34:29,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737577218] [2020-12-22 10:34:29,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1638376375] [2020-12-22 10:34:29,041 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:34:29,099 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:29,099 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:29,100 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:29,101 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:29,148 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 10:34:29,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:29,149 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:29,149 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [572945927] [2020-12-22 10:34:29,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:29,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:29,150 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:29,150 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:29,150 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand 21 states. [2020-12-22 10:34:29,680 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:29,681 INFO L93 Difference]: Finished difference Result 127 states and 289 transitions. [2020-12-22 10:34:29,681 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:29,681 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:29,682 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:29,683 INFO L225 Difference]: With dead ends: 127 [2020-12-22 10:34:29,683 INFO L226 Difference]: Without dead ends: 121 [2020-12-22 10:34:29,683 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 328 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=463, Invalid=1259, Unknown=0, NotChecked=0, Total=1722 [2020-12-22 10:34:29,684 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-12-22 10:34:29,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 76. [2020-12-22 10:34:29,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-12-22 10:34:29,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 187 transitions. [2020-12-22 10:34:29,687 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 187 transitions. Word has length 24 [2020-12-22 10:34:29,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:29,687 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 187 transitions. [2020-12-22 10:34:29,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:29,687 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 187 transitions. [2020-12-22 10:34:29,687 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:29,688 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:29,688 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:29,888 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:29,889 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:29,889 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:29,889 INFO L82 PathProgramCache]: Analyzing trace with hash 1773479282, now seen corresponding path program 83 times [2020-12-22 10:34:29,890 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:29,890 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1244756636] [2020-12-22 10:34:29,890 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:29,899 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:30,109 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 10:34:30,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1244756636] [2020-12-22 10:34:30,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [885936047] [2020-12-22 10:34:30,110 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 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 10:34:30,181 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-12-22 10:34:30,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:30,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:30,183 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:30,234 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-12-22 10:34:30,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:30,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:30,235 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [537361487] [2020-12-22 10:34:30,236 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:30,236 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:30,236 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:30,236 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:30,236 INFO L87 Difference]: Start difference. First operand 76 states and 187 transitions. Second operand 21 states. [2020-12-22 10:34:30,841 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:30,841 INFO L93 Difference]: Finished difference Result 125 states and 287 transitions. [2020-12-22 10:34:30,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:30,842 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:30,842 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:30,843 INFO L225 Difference]: With dead ends: 125 [2020-12-22 10:34:30,843 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 10:34:30,844 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=503, Invalid=1389, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:34:30,844 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 10:34:30,846 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 78. [2020-12-22 10:34:30,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 78 states. [2020-12-22 10:34:30,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 193 transitions. [2020-12-22 10:34:30,847 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 193 transitions. Word has length 24 [2020-12-22 10:34:30,847 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:30,847 INFO L481 AbstractCegarLoop]: Abstraction has 78 states and 193 transitions. [2020-12-22 10:34:30,847 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:30,847 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 193 transitions. [2020-12-22 10:34:30,847 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:30,848 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:30,848 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:31,062 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:31,063 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:31,063 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:31,064 INFO L82 PathProgramCache]: Analyzing trace with hash -120616982, now seen corresponding path program 84 times [2020-12-22 10:34:31,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:31,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887194305] [2020-12-22 10:34:31,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:31,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:31,277 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 10:34:31,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887194305] [2020-12-22 10:34:31,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [312177939] [2020-12-22 10:34:31,278 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 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 10:34:31,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-12-22 10:34:31,342 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:31,343 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:31,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:31,390 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 10:34:31,391 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:31,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:31,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421144505] [2020-12-22 10:34:31,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:31,392 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:31,392 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:31,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:31,392 INFO L87 Difference]: Start difference. First operand 78 states and 193 transitions. Second operand 21 states. [2020-12-22 10:34:32,096 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:32,096 INFO L93 Difference]: Finished difference Result 123 states and 285 transitions. [2020-12-22 10:34:32,097 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:32,097 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:32,097 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:32,098 INFO L225 Difference]: With dead ends: 123 [2020-12-22 10:34:32,098 INFO L226 Difference]: Without dead ends: 117 [2020-12-22 10:34:32,099 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 10:34:32,099 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-12-22 10:34:32,101 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 80. [2020-12-22 10:34:32,101 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-12-22 10:34:32,101 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 199 transitions. [2020-12-22 10:34:32,101 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 199 transitions. Word has length 24 [2020-12-22 10:34:32,101 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:32,101 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 199 transitions. [2020-12-22 10:34:32,102 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:32,102 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 199 transitions. [2020-12-22 10:34:32,102 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:32,102 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:32,102 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:32,317 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-12-22 10:34:32,318 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:32,318 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:32,318 INFO L82 PathProgramCache]: Analyzing trace with hash -1248843678, now seen corresponding path program 85 times [2020-12-22 10:34:32,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:32,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569623651] [2020-12-22 10:34:32,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:32,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:32,503 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 10:34:32,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569623651] [2020-12-22 10:34:32,504 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1002071767] [2020-12-22 10:34:32,504 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 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 10:34:32,562 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:32,563 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:32,563 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:32,611 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 10:34:32,612 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:32,612 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:32,612 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520876677] [2020-12-22 10:34:32,612 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:32,612 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:32,613 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:32,613 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:32,613 INFO L87 Difference]: Start difference. First operand 80 states and 199 transitions. Second operand 21 states. [2020-12-22 10:34:33,309 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:33,310 INFO L93 Difference]: Finished difference Result 121 states and 283 transitions. [2020-12-22 10:34:33,310 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:33,310 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:33,310 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:33,311 INFO L225 Difference]: With dead ends: 121 [2020-12-22 10:34:33,311 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 10:34:33,312 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 517 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=631, Invalid=1625, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:34:33,312 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 10:34:33,313 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 82. [2020-12-22 10:34:33,313 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-12-22 10:34:33,314 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 205 transitions. [2020-12-22 10:34:33,314 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 205 transitions. Word has length 24 [2020-12-22 10:34:33,314 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:33,314 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 205 transitions. [2020-12-22 10:34:33,314 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:33,314 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 205 transitions. [2020-12-22 10:34:33,315 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:33,315 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:33,315 INFO L422 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:33,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:33,516 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:33,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:33,517 INFO L82 PathProgramCache]: Analyzing trace with hash -1334933798, now seen corresponding path program 86 times [2020-12-22 10:34:33,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:33,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1126518755] [2020-12-22 10:34:33,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:33,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:33,698 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 10:34:33,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1126518755] [2020-12-22 10:34:33,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623617389] [2020-12-22 10:34:33,699 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 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 10:34:33,758 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:33,758 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:33,759 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:33,760 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:33,815 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 10:34:33,816 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:33,816 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:33,816 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2143737042] [2020-12-22 10:34:33,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:33,817 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:33,817 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:33,817 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:33,817 INFO L87 Difference]: Start difference. First operand 82 states and 205 transitions. Second operand 21 states. [2020-12-22 10:34:34,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:34,551 INFO L93 Difference]: Finished difference Result 120 states and 283 transitions. [2020-12-22 10:34:34,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:34:34,552 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:34,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:34,553 INFO L225 Difference]: With dead ends: 120 [2020-12-22 10:34:34,553 INFO L226 Difference]: Without dead ends: 114 [2020-12-22 10:34:34,554 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 588 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=719, Invalid=1731, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 10:34:34,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2020-12-22 10:34:34,556 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 84. [2020-12-22 10:34:34,556 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 84 states. [2020-12-22 10:34:34,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 84 states to 84 states and 212 transitions. [2020-12-22 10:34:34,556 INFO L78 Accepts]: Start accepts. Automaton has 84 states and 212 transitions. Word has length 24 [2020-12-22 10:34:34,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:34,556 INFO L481 AbstractCegarLoop]: Abstraction has 84 states and 212 transitions. [2020-12-22 10:34:34,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:34,557 INFO L276 IsEmpty]: Start isEmpty. Operand 84 states and 212 transitions. [2020-12-22 10:34:34,557 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-12-22 10:34:34,557 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:34,557 INFO L422 BasicCegarLoop]: trace histogram [9, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:34,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-12-22 10:34:34,758 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:34,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:34,759 INFO L82 PathProgramCache]: Analyzing trace with hash -1312650874, now seen corresponding path program 87 times [2020-12-22 10:34:34,759 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:34,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [117376866] [2020-12-22 10:34:34,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:34,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:34,948 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:34:34,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [117376866] [2020-12-22 10:34:34,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [33045396] [2020-12-22 10:34:34,949 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 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 10:34:35,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-12-22 10:34:35,017 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:35,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 160 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:35,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:35,083 INFO L134 CoverageAnalysis]: Checked inductivity of 57 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 1 trivial. 0 not checked. [2020-12-22 10:34:35,083 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:35,083 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 19 [2020-12-22 10:34:35,083 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1938769897] [2020-12-22 10:34:35,084 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:35,084 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:35,084 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:35,084 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=328, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:35,085 INFO L87 Difference]: Start difference. First operand 84 states and 212 transitions. Second operand 21 states. [2020-12-22 10:34:36,063 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:36,063 INFO L93 Difference]: Finished difference Result 134 states and 322 transitions. [2020-12-22 10:34:36,064 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-12-22 10:34:36,064 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 24 [2020-12-22 10:34:36,064 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:36,065 INFO L225 Difference]: With dead ends: 134 [2020-12-22 10:34:36,065 INFO L226 Difference]: Without dead ends: 123 [2020-12-22 10:34:36,066 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 72 GetRequests, 21 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 680 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=777, Invalid=1979, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 10:34:36,066 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 123 states. [2020-12-22 10:34:36,068 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 123 to 88. [2020-12-22 10:34:36,068 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-12-22 10:34:36,068 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 221 transitions. [2020-12-22 10:34:36,069 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 221 transitions. Word has length 24 [2020-12-22 10:34:36,069 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:36,069 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 221 transitions. [2020-12-22 10:34:36,069 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:36,069 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 221 transitions. [2020-12-22 10:34:36,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:36,070 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:36,070 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:36,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:36,285 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:36,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:36,285 INFO L82 PathProgramCache]: Analyzing trace with hash -2038282157, now seen corresponding path program 88 times [2020-12-22 10:34:36,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:36,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517168518] [2020-12-22 10:34:36,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:36,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:36,467 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 10:34:36,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517168518] [2020-12-22 10:34:36,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453695713] [2020-12-22 10:34:36,467 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 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 10:34:36,526 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:36,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:36,527 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 22 conjunts are in the unsatisfiable core [2020-12-22 10:34:36,528 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:36,573 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 10:34:36,573 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:36,574 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-12-22 10:34:36,574 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1486572470] [2020-12-22 10:34:36,574 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:36,574 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:36,575 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:36,575 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:36,575 INFO L87 Difference]: Start difference. First operand 88 states and 221 transitions. Second operand 21 states. [2020-12-22 10:34:37,337 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:37,337 INFO L93 Difference]: Finished difference Result 144 states and 343 transitions. [2020-12-22 10:34:37,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:34:37,338 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 25 [2020-12-22 10:34:37,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:37,339 INFO L225 Difference]: With dead ends: 144 [2020-12-22 10:34:37,339 INFO L226 Difference]: Without dead ends: 136 [2020-12-22 10:34:37,340 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 663 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=823, Invalid=1829, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 10:34:37,340 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-12-22 10:34:37,341 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 91. [2020-12-22 10:34:37,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-12-22 10:34:37,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 235 transitions. [2020-12-22 10:34:37,342 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 235 transitions. Word has length 25 [2020-12-22 10:34:37,342 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:37,342 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 235 transitions. [2020-12-22 10:34:37,342 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:37,342 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 235 transitions. [2020-12-22 10:34:37,343 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-12-22 10:34:37,343 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:37,343 INFO L422 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:37,544 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-12-22 10:34:37,545 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:37,545 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:37,545 INFO L82 PathProgramCache]: Analyzing trace with hash -2037564073, now seen corresponding path program 89 times [2020-12-22 10:34:37,546 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:37,546 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424623774] [2020-12-22 10:34:37,546 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:37,555 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:37,768 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 10:34:37,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424623774] [2020-12-22 10:34:37,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630841502] [2020-12-22 10:34:37,769 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 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 10:34:37,837 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 10:34:37,838 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:37,839 INFO L263 TraceCheckSpWp]: Trace formula consists of 165 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:37,839 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:37,884 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:34:37,904 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 10:34:37,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:37,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 21 [2020-12-22 10:34:37,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [623698198] [2020-12-22 10:34:37,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:34:37,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:37,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:34:37,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=111, Invalid=395, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:34:37,905 INFO L87 Difference]: Start difference. First operand 91 states and 235 transitions. Second operand 23 states. [2020-12-22 10:34:39,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:39,012 INFO L93 Difference]: Finished difference Result 139 states and 334 transitions. [2020-12-22 10:34:39,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-12-22 10:34:39,013 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 25 [2020-12-22 10:34:39,013 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:39,014 INFO L225 Difference]: With dead ends: 139 [2020-12-22 10:34:39,014 INFO L226 Difference]: Without dead ends: 119 [2020-12-22 10:34:39,014 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 22 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 800 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=995, Invalid=2197, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 10:34:39,015 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-12-22 10:34:39,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 93. [2020-12-22 10:34:39,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 93 states. [2020-12-22 10:34:39,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 220 transitions. [2020-12-22 10:34:39,019 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 220 transitions. Word has length 25 [2020-12-22 10:34:39,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:39,020 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 220 transitions. [2020-12-22 10:34:39,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:34:39,020 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 220 transitions. [2020-12-22 10:34:39,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:39,020 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:39,020 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:39,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:39,234 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:39,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:39,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1665678122, now seen corresponding path program 90 times [2020-12-22 10:34:39,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:39,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [282063131] [2020-12-22 10:34:39,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:39,245 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:39,502 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 10:34:39,502 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [282063131] [2020-12-22 10:34:39,503 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292655253] [2020-12-22 10:34:39,503 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 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 10:34:39,578 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 10:34:39,578 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:39,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:39,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:39,618 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 10:34:39,619 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:39,619 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 10:34:39,619 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1030189544] [2020-12-22 10:34:39,619 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:39,619 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:39,620 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:39,620 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=97, Invalid=323, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:39,620 INFO L87 Difference]: Start difference. First operand 93 states and 220 transitions. Second operand 21 states. [2020-12-22 10:34:40,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:40,125 INFO L93 Difference]: Finished difference Result 122 states and 279 transitions. [2020-12-22 10:34:40,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:40,126 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 10:34:40,126 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:40,127 INFO L225 Difference]: With dead ends: 122 [2020-12-22 10:34:40,127 INFO L226 Difference]: Without dead ends: 115 [2020-12-22 10:34:40,128 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 282 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=466, Invalid=1174, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:34:40,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-12-22 10:34:40,129 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-12-22 10:34:40,130 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 10:34:40,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 223 transitions. [2020-12-22 10:34:40,130 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 223 transitions. Word has length 26 [2020-12-22 10:34:40,130 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:40,130 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 223 transitions. [2020-12-22 10:34:40,130 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:40,130 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 223 transitions. [2020-12-22 10:34:40,131 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:40,131 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:40,131 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:40,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-12-22 10:34:40,338 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:40,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:40,338 INFO L82 PathProgramCache]: Analyzing trace with hash 1739104690, now seen corresponding path program 91 times [2020-12-22 10:34:40,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:40,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058672479] [2020-12-22 10:34:40,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:40,347 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:40,587 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 10:34:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058672479] [2020-12-22 10:34:40,588 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1213994735] [2020-12-22 10:34:40,588 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 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 10:34:40,646 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:40,647 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:40,649 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:40,703 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 10:34:40,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:40,703 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 10:34:40,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1863842783] [2020-12-22 10:34:40,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:40,704 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:40,704 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:40,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:40,705 INFO L87 Difference]: Start difference. First operand 94 states and 223 transitions. Second operand 21 states. [2020-12-22 10:34:41,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:41,227 INFO L93 Difference]: Finished difference Result 137 states and 311 transitions. [2020-12-22 10:34:41,228 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:41,228 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 10:34:41,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:41,229 INFO L225 Difference]: With dead ends: 137 [2020-12-22 10:34:41,229 INFO L226 Difference]: Without dead ends: 130 [2020-12-22 10:34:41,230 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 387 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=518, Invalid=1374, Unknown=0, NotChecked=0, Total=1892 [2020-12-22 10:34:41,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-12-22 10:34:41,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 96. [2020-12-22 10:34:41,231 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 10:34:41,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 229 transitions. [2020-12-22 10:34:41,232 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 229 transitions. Word has length 26 [2020-12-22 10:34:41,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:41,232 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 229 transitions. [2020-12-22 10:34:41,232 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:41,232 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 229 transitions. [2020-12-22 10:34:41,232 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:41,233 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:41,233 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:41,434 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:41,434 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:41,435 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:41,435 INFO L82 PathProgramCache]: Analyzing trace with hash 1082198586, now seen corresponding path program 92 times [2020-12-22 10:34:41,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:41,435 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [303419583] [2020-12-22 10:34:41,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:41,445 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:41,678 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 10:34:41,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [303419583] [2020-12-22 10:34:41,678 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1550839190] [2020-12-22 10:34:41,679 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 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 10:34:41,739 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:41,740 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:41,741 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:41,742 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:41,777 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 10:34:41,778 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:41,778 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 10:34:41,778 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296070777] [2020-12-22 10:34:41,778 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:41,778 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:41,778 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:41,779 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=341, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:41,779 INFO L87 Difference]: Start difference. First operand 96 states and 229 transitions. Second operand 21 states. [2020-12-22 10:34:42,407 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:42,408 INFO L93 Difference]: Finished difference Result 135 states and 309 transitions. [2020-12-22 10:34:42,408 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:42,409 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 10:34:42,409 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:42,410 INFO L225 Difference]: With dead ends: 135 [2020-12-22 10:34:42,410 INFO L226 Difference]: Without dead ends: 128 [2020-12-22 10:34:42,410 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 44 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 450 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=556, Invalid=1514, Unknown=0, NotChecked=0, Total=2070 [2020-12-22 10:34:42,411 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-12-22 10:34:42,413 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 98. [2020-12-22 10:34:42,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 10:34:42,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2020-12-22 10:34:42,413 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 26 [2020-12-22 10:34:42,413 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:42,413 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2020-12-22 10:34:42,413 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:42,413 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2020-12-22 10:34:42,414 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:42,414 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:42,414 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:42,614 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:42,615 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:42,615 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:42,615 INFO L82 PathProgramCache]: Analyzing trace with hash 1340732610, now seen corresponding path program 93 times [2020-12-22 10:34:42,616 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:42,616 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1169848388] [2020-12-22 10:34:42,616 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:42,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:42,841 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 10:34:42,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1169848388] [2020-12-22 10:34:42,842 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1501204673] [2020-12-22 10:34:42,842 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 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 10:34:42,914 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 10:34:42,915 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:42,916 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:34:42,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:42,945 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 10:34:42,946 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:42,946 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 10:34:42,946 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [282877223] [2020-12-22 10:34:42,946 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:42,946 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:42,946 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:42,947 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:42,947 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand 21 states. [2020-12-22 10:34:43,624 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:43,624 INFO L93 Difference]: Finished difference Result 133 states and 307 transitions. [2020-12-22 10:34:43,625 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:43,625 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 10:34:43,625 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:43,626 INFO L225 Difference]: With dead ends: 133 [2020-12-22 10:34:43,626 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 10:34:43,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 523 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=610, Invalid=1646, Unknown=0, NotChecked=0, Total=2256 [2020-12-22 10:34:43,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 10:34:43,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 100. [2020-12-22 10:34:43,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 10:34:43,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 241 transitions. [2020-12-22 10:34:43,629 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 241 transitions. Word has length 26 [2020-12-22 10:34:43,629 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:43,629 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 241 transitions. [2020-12-22 10:34:43,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:43,629 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 241 transitions. [2020-12-22 10:34:43,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:43,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:43,630 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:43,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:43,831 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:43,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:43,831 INFO L82 PathProgramCache]: Analyzing trace with hash -1541676726, now seen corresponding path program 94 times [2020-12-22 10:34:43,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:43,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1994098629] [2020-12-22 10:34:43,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:43,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:44,058 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 10:34:44,058 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1994098629] [2020-12-22 10:34:44,059 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1819492625] [2020-12-22 10:34:44,059 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 10:34:44,133 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:44,133 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:44,135 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:44,136 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:44,170 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 10:34:44,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:44,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 10:34:44,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [850588662] [2020-12-22 10:34:44,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:44,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:44,172 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:44,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:44,172 INFO L87 Difference]: Start difference. First operand 100 states and 241 transitions. Second operand 21 states. [2020-12-22 10:34:44,905 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:44,905 INFO L93 Difference]: Finished difference Result 131 states and 305 transitions. [2020-12-22 10:34:44,905 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:34:44,906 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 10:34:44,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:44,907 INFO L225 Difference]: With dead ends: 131 [2020-12-22 10:34:44,907 INFO L226 Difference]: Without dead ends: 124 [2020-12-22 10:34:44,907 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 48 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 600 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=680, Invalid=1770, Unknown=0, NotChecked=0, Total=2450 [2020-12-22 10:34:44,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2020-12-22 10:34:44,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 102. [2020-12-22 10:34:44,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 10:34:44,911 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-12-22 10:34:44,911 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 26 [2020-12-22 10:34:44,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:44,911 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-12-22 10:34:44,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:44,911 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-12-22 10:34:44,912 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:44,912 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:44,912 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:45,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:45,127 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:45,127 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:45,128 INFO L82 PathProgramCache]: Analyzing trace with hash 2138001362, now seen corresponding path program 95 times [2020-12-22 10:34:45,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:45,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [746667305] [2020-12-22 10:34:45,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:45,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:45,349 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 10:34:45,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [746667305] [2020-12-22 10:34:45,350 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [945288862] [2020-12-22 10:34:45,350 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 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 10:34:45,412 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 10:34:45,412 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:45,413 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:45,414 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:45,445 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 10:34:45,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:45,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 10:34:45,446 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1529906128] [2020-12-22 10:34:45,446 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:45,446 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:45,447 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:45,447 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=338, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:45,447 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 21 states. [2020-12-22 10:34:46,249 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:46,249 INFO L93 Difference]: Finished difference Result 129 states and 303 transitions. [2020-12-22 10:34:46,249 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:34:46,250 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 10:34:46,250 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:46,251 INFO L225 Difference]: With dead ends: 129 [2020-12-22 10:34:46,251 INFO L226 Difference]: Without dead ends: 122 [2020-12-22 10:34:46,251 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 50 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 681 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=766, Invalid=1886, Unknown=0, NotChecked=0, Total=2652 [2020-12-22 10:34:46,252 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2020-12-22 10:34:46,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 104. [2020-12-22 10:34:46,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 10:34:46,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 253 transitions. [2020-12-22 10:34:46,254 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 253 transitions. Word has length 26 [2020-12-22 10:34:46,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:46,254 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 253 transitions. [2020-12-22 10:34:46,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:46,254 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 253 transitions. [2020-12-22 10:34:46,254 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:46,255 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:46,255 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:46,457 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-12-22 10:34:46,457 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:46,458 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:46,458 INFO L82 PathProgramCache]: Analyzing trace with hash -530792358, now seen corresponding path program 96 times [2020-12-22 10:34:46,458 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:46,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [892218238] [2020-12-22 10:34:46,459 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:46,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:46,675 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 10:34:46,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [892218238] [2020-12-22 10:34:46,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [449204397] [2020-12-22 10:34:46,676 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 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 10:34:46,747 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 10:34:46,747 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:46,748 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 10:34:46,749 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:46,782 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 10:34:46,782 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:46,782 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 10:34:46,782 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1336724021] [2020-12-22 10:34:46,782 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:46,782 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:46,783 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:46,783 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:46,783 INFO L87 Difference]: Start difference. First operand 104 states and 253 transitions. Second operand 21 states. [2020-12-22 10:34:47,622 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:47,623 INFO L93 Difference]: Finished difference Result 127 states and 301 transitions. [2020-12-22 10:34:47,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 10:34:47,624 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 10:34:47,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:47,625 INFO L225 Difference]: With dead ends: 127 [2020-12-22 10:34:47,625 INFO L226 Difference]: Without dead ends: 120 [2020-12-22 10:34:47,625 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 766 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=868, Invalid=1994, Unknown=0, NotChecked=0, Total=2862 [2020-12-22 10:34:47,626 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-12-22 10:34:47,628 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 106. [2020-12-22 10:34:47,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 10:34:47,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2020-12-22 10:34:47,628 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 26 [2020-12-22 10:34:47,628 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:47,628 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2020-12-22 10:34:47,629 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:47,629 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2020-12-22 10:34:47,629 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:47,629 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:47,629 INFO L422 BasicCegarLoop]: trace histogram [10, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:47,830 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:47,830 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:47,831 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:47,831 INFO L82 PathProgramCache]: Analyzing trace with hash 159167202, now seen corresponding path program 97 times [2020-12-22 10:34:47,831 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:47,831 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [970191152] [2020-12-22 10:34:47,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:47,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:48,068 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 10:34:48,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [970191152] [2020-12-22 10:34:48,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [882272426] [2020-12-22 10:34:48,069 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 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 10:34:48,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:48,128 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 23 conjunts are in the unsatisfiable core [2020-12-22 10:34:48,129 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:48,154 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 10:34:48,154 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:48,154 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-12-22 10:34:48,155 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [829438961] [2020-12-22 10:34:48,155 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-12-22 10:34:48,155 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:48,155 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-12-22 10:34:48,156 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=104, Invalid=316, Unknown=0, NotChecked=0, Total=420 [2020-12-22 10:34:48,156 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 21 states. [2020-12-22 10:34:49,039 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:49,040 INFO L93 Difference]: Finished difference Result 149 states and 357 transitions. [2020-12-22 10:34:49,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 10:34:49,041 INFO L78 Accepts]: Start accepts. Automaton has 21 states. Word has length 26 [2020-12-22 10:34:49,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:49,042 INFO L225 Difference]: With dead ends: 149 [2020-12-22 10:34:49,043 INFO L226 Difference]: Without dead ends: 141 [2020-12-22 10:34:49,044 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 54 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 855 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=986, Invalid=2094, Unknown=0, NotChecked=0, Total=3080 [2020-12-22 10:34:49,044 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-12-22 10:34:49,047 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-12-22 10:34:49,047 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-12-22 10:34:49,048 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 283 transitions. [2020-12-22 10:34:49,048 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 283 transitions. Word has length 26 [2020-12-22 10:34:49,048 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:49,048 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 283 transitions. [2020-12-22 10:34:49,048 INFO L482 AbstractCegarLoop]: Interpolant automaton has 21 states. [2020-12-22 10:34:49,048 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 283 transitions. [2020-12-22 10:34:49,049 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-12-22 10:34:49,049 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:49,049 INFO L422 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:49,257 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-12-22 10:34:49,258 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:49,258 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:49,258 INFO L82 PathProgramCache]: Analyzing trace with hash 159885286, now seen corresponding path program 98 times [2020-12-22 10:34:49,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:49,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995204332] [2020-12-22 10:34:49,259 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:49,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:49,509 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 10:34:49,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995204332] [2020-12-22 10:34:49,510 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1182590372] [2020-12-22 10:34:49,510 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 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 10:34:49,601 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:49,601 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:49,603 INFO L263 TraceCheckSpWp]: Trace formula consists of 170 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:49,607 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:49,669 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:34:49,696 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 10:34:49,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:49,697 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 22 [2020-12-22 10:34:49,697 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1254741183] [2020-12-22 10:34:49,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 10:34:49,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:49,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 10:34:49,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=121, Invalid=431, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:34:49,699 INFO L87 Difference]: Start difference. First operand 113 states and 283 transitions. Second operand 24 states. [2020-12-22 10:34:50,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:50,914 INFO L93 Difference]: Finished difference Result 144 states and 349 transitions. [2020-12-22 10:34:50,915 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-12-22 10:34:50,915 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 26 [2020-12-22 10:34:50,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:50,916 INFO L225 Difference]: With dead ends: 144 [2020-12-22 10:34:50,916 INFO L226 Difference]: Without dead ends: 126 [2020-12-22 10:34:50,917 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 83 GetRequests, 23 SyntacticMatches, 0 SemanticMatches, 60 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1050 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1197, Invalid=2585, Unknown=0, NotChecked=0, Total=3782 [2020-12-22 10:34:50,917 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-12-22 10:34:50,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 71. [2020-12-22 10:34:50,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-12-22 10:34:50,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-12-22 10:34:50,921 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 26 [2020-12-22 10:34:50,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:50,921 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-12-22 10:34:50,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 10:34:50,921 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-12-22 10:34:50,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:34:50,921 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:50,921 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:51,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-12-22 10:34:51,129 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:51,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:51,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1360304315, now seen corresponding path program 99 times [2020-12-22 10:34:51,130 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:51,130 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924815155] [2020-12-22 10:34:51,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:51,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:51,418 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 10:34:51,418 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924815155] [2020-12-22 10:34:51,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1573264825] [2020-12-22 10:34:51,419 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 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 10:34:51,491 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 10:34:51,491 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:51,493 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:34:51,494 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:51,557 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 10:34:51,557 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:51,557 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-12-22 10:34:51,557 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646115018] [2020-12-22 10:34:51,558 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-12-22 10:34:51,558 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:51,558 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-12-22 10:34:51,559 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=125, Invalid=381, Unknown=0, NotChecked=0, Total=506 [2020-12-22 10:34:51,559 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 23 states. [2020-12-22 10:34:52,151 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:52,151 INFO L93 Difference]: Finished difference Result 102 states and 235 transitions. [2020-12-22 10:34:52,152 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-12-22 10:34:52,152 INFO L78 Accepts]: Start accepts. Automaton has 23 states. Word has length 27 [2020-12-22 10:34:52,153 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:52,153 INFO L225 Difference]: With dead ends: 102 [2020-12-22 10:34:52,153 INFO L226 Difference]: Without dead ends: 95 [2020-12-22 10:34:52,154 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=560, Invalid=1246, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:34:52,155 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-12-22 10:34:52,156 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 90. [2020-12-22 10:34:52,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 90 states. [2020-12-22 10:34:52,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 211 transitions. [2020-12-22 10:34:52,157 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 211 transitions. Word has length 27 [2020-12-22 10:34:52,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:52,157 INFO L481 AbstractCegarLoop]: Abstraction has 90 states and 211 transitions. [2020-12-22 10:34:52,157 INFO L482 AbstractCegarLoop]: Interpolant automaton has 23 states. [2020-12-22 10:34:52,158 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 211 transitions. [2020-12-22 10:34:52,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:34:52,158 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:52,158 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:52,365 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-12-22 10:34:52,366 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:52,366 INFO L82 PathProgramCache]: Analyzing trace with hash 69080055, now seen corresponding path program 100 times [2020-12-22 10:34:52,367 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:52,367 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1823243386] [2020-12-22 10:34:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:52,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:52,669 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 10:34:52,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1823243386] [2020-12-22 10:34:52,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [226950512] [2020-12-22 10:34:52,670 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 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 10:34:52,726 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:34:52,726 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:52,727 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:52,728 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:52,758 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 10:34:52,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:52,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:34:52,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1507604440] [2020-12-22 10:34:52,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:52,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:52,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:52,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:52,760 INFO L87 Difference]: Start difference. First operand 90 states and 211 transitions. Second operand 22 states. [2020-12-22 10:34:53,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:53,320 INFO L93 Difference]: Finished difference Result 164 states and 363 transitions. [2020-12-22 10:34:53,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-12-22 10:34:53,321 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:34:53,322 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:53,322 INFO L225 Difference]: With dead ends: 164 [2020-12-22 10:34:53,322 INFO L226 Difference]: Without dead ends: 157 [2020-12-22 10:34:53,323 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 65 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-12-22 10:34:53,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 157 states. [2020-12-22 10:34:53,325 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 157 to 94. [2020-12-22 10:34:53,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-12-22 10:34:53,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 223 transitions. [2020-12-22 10:34:53,329 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 223 transitions. Word has length 27 [2020-12-22 10:34:53,329 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:53,330 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 223 transitions. [2020-12-22 10:34:53,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:53,330 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 223 transitions. [2020-12-22 10:34:53,330 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:34:53,330 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:53,330 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:53,542 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-12-22 10:34:53,543 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:53,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:53,544 INFO L82 PathProgramCache]: Analyzing trace with hash 1912535167, now seen corresponding path program 101 times [2020-12-22 10:34:53,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:53,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [370520139] [2020-12-22 10:34:53,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:53,552 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:53,825 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 10:34:53,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [370520139] [2020-12-22 10:34:53,825 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542258214] [2020-12-22 10:34:53,826 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 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 10:34:53,889 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 10:34:53,890 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:53,891 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:53,892 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:53,943 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 10:34:53,944 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:53,944 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:34:53,944 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360651112] [2020-12-22 10:34:53,944 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:53,945 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:53,945 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:53,945 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:53,945 INFO L87 Difference]: Start difference. First operand 94 states and 223 transitions. Second operand 22 states. [2020-12-22 10:34:54,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:54,515 INFO L93 Difference]: Finished difference Result 162 states and 361 transitions. [2020-12-22 10:34:54,516 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-12-22 10:34:54,516 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:34:54,516 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:54,517 INFO L225 Difference]: With dead ends: 162 [2020-12-22 10:34:54,517 INFO L226 Difference]: Without dead ends: 155 [2020-12-22 10:34:54,518 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 67 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=506, Invalid=1300, Unknown=0, NotChecked=0, Total=1806 [2020-12-22 10:34:54,518 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-12-22 10:34:54,520 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 96. [2020-12-22 10:34:54,520 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-12-22 10:34:54,521 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 229 transitions. [2020-12-22 10:34:54,521 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 229 transitions. Word has length 27 [2020-12-22 10:34:54,521 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:54,521 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 229 transitions. [2020-12-22 10:34:54,521 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:54,521 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 229 transitions. [2020-12-22 10:34:54,522 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:34:54,522 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:54,522 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:54,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:54,736 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:54,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:54,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1985961735, now seen corresponding path program 102 times [2020-12-22 10:34:54,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:54,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1977771396] [2020-12-22 10:34:54,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:54,746 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:54,960 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 10:34:54,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1977771396] [2020-12-22 10:34:54,961 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1787670440] [2020-12-22 10:34:54,961 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 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 10:34:55,037 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 10:34:55,038 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:55,038 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:55,039 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:55,074 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 10:34:55,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:55,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:34:55,075 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031138153] [2020-12-22 10:34:55,075 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:55,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:55,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:55,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:55,076 INFO L87 Difference]: Start difference. First operand 96 states and 229 transitions. Second operand 22 states. [2020-12-22 10:34:55,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:55,738 INFO L93 Difference]: Finished difference Result 160 states and 359 transitions. [2020-12-22 10:34:55,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-12-22 10:34:55,739 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:34:55,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:55,740 INFO L225 Difference]: With dead ends: 160 [2020-12-22 10:34:55,740 INFO L226 Difference]: Without dead ends: 153 [2020-12-22 10:34:55,741 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 69 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 379 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=529, Invalid=1451, Unknown=0, NotChecked=0, Total=1980 [2020-12-22 10:34:55,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-12-22 10:34:55,744 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 98. [2020-12-22 10:34:55,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-12-22 10:34:55,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 235 transitions. [2020-12-22 10:34:55,744 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 235 transitions. Word has length 27 [2020-12-22 10:34:55,744 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:55,744 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 235 transitions. [2020-12-22 10:34:55,745 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:55,745 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 235 transitions. [2020-12-22 10:34:55,745 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:34:55,745 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:55,745 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:55,960 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:34:55,961 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:55,961 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:55,961 INFO L82 PathProgramCache]: Analyzing trace with hash 1329055631, now seen corresponding path program 103 times [2020-12-22 10:34:55,962 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:55,962 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [380099394] [2020-12-22 10:34:55,962 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:55,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:56,228 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 10:34:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [380099394] [2020-12-22 10:34:56,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1258701201] [2020-12-22 10:34:56,228 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 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 10:34:56,289 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:56,290 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:56,291 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:56,317 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 10:34:56,317 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:56,317 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:34:56,318 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [309935599] [2020-12-22 10:34:56,318 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:56,318 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:56,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:56,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:56,318 INFO L87 Difference]: Start difference. First operand 98 states and 235 transitions. Second operand 22 states. [2020-12-22 10:34:57,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:57,039 INFO L93 Difference]: Finished difference Result 158 states and 357 transitions. [2020-12-22 10:34:57,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-12-22 10:34:57,040 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:34:57,040 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:57,040 INFO L225 Difference]: With dead ends: 158 [2020-12-22 10:34:57,041 INFO L226 Difference]: Without dead ends: 151 [2020-12-22 10:34:57,041 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 71 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 45 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=568, Invalid=1594, Unknown=0, NotChecked=0, Total=2162 [2020-12-22 10:34:57,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-12-22 10:34:57,044 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 100. [2020-12-22 10:34:57,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-12-22 10:34:57,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 241 transitions. [2020-12-22 10:34:57,045 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 241 transitions. Word has length 27 [2020-12-22 10:34:57,045 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:57,045 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 241 transitions. [2020-12-22 10:34:57,045 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:57,045 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 241 transitions. [2020-12-22 10:34:57,046 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:34:57,046 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:57,046 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:57,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-12-22 10:34:57,260 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:57,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:57,260 INFO L82 PathProgramCache]: Analyzing trace with hash 1587589655, now seen corresponding path program 104 times [2020-12-22 10:34:57,261 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:57,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728929598] [2020-12-22 10:34:57,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:57,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:57,511 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 10:34:57,511 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728929598] [2020-12-22 10:34:57,512 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1510828476] [2020-12-22 10:34:57,512 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 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 10:34:57,573 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-12-22 10:34:57,574 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:57,575 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:34:57,575 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:57,604 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 10:34:57,605 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:57,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:34:57,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146954125] [2020-12-22 10:34:57,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:57,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:57,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:57,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=380, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:57,606 INFO L87 Difference]: Start difference. First operand 100 states and 241 transitions. Second operand 22 states. [2020-12-22 10:34:58,382 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:58,382 INFO L93 Difference]: Finished difference Result 156 states and 355 transitions. [2020-12-22 10:34:58,383 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-12-22 10:34:58,383 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:34:58,384 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:58,384 INFO L225 Difference]: With dead ends: 156 [2020-12-22 10:34:58,384 INFO L226 Difference]: Without dead ends: 149 [2020-12-22 10:34:58,385 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 73 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 507 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=623, Invalid=1729, Unknown=0, NotChecked=0, Total=2352 [2020-12-22 10:34:58,385 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-12-22 10:34:58,387 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 102. [2020-12-22 10:34:58,387 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-12-22 10:34:58,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-12-22 10:34:58,387 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 27 [2020-12-22 10:34:58,388 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:58,388 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-12-22 10:34:58,388 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:58,388 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-12-22 10:34:58,388 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:34:58,388 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:58,388 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:58,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-12-22 10:34:58,589 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:58,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:58,590 INFO L82 PathProgramCache]: Analyzing trace with hash -1294819681, now seen corresponding path program 105 times [2020-12-22 10:34:58,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:58,590 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783761497] [2020-12-22 10:34:58,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:58,599 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:34:58,844 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 10:34:58,844 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783761497] [2020-12-22 10:34:58,845 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [171701265] [2020-12-22 10:34:58,845 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 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 10:34:58,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-12-22 10:34:58,913 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:34:58,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 33 conjunts are in the unsatisfiable core [2020-12-22 10:34:58,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:34:58,954 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 10:34:58,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:34:58,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:34:58,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1922341469] [2020-12-22 10:34:58,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:34:58,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:34:58,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:34:58,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=378, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:34:58,956 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 22 states. [2020-12-22 10:34:59,767 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:34:59,767 INFO L93 Difference]: Finished difference Result 154 states and 353 transitions. [2020-12-22 10:34:59,768 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 34 states. [2020-12-22 10:34:59,768 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:34:59,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:34:59,768 INFO L225 Difference]: With dead ends: 154 [2020-12-22 10:34:59,769 INFO L226 Difference]: Without dead ends: 147 [2020-12-22 10:34:59,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 75 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 577 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=694, Invalid=1856, Unknown=0, NotChecked=0, Total=2550 [2020-12-22 10:34:59,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-12-22 10:34:59,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 104. [2020-12-22 10:34:59,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-12-22 10:34:59,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 253 transitions. [2020-12-22 10:34:59,772 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 253 transitions. Word has length 27 [2020-12-22 10:34:59,772 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:34:59,772 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 253 transitions. [2020-12-22 10:34:59,772 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:34:59,772 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 253 transitions. [2020-12-22 10:34:59,772 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:34:59,773 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:34:59,773 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:34:59,988 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-12-22 10:34:59,989 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:34:59,989 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:34:59,989 INFO L82 PathProgramCache]: Analyzing trace with hash -1910108889, now seen corresponding path program 106 times [2020-12-22 10:34:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:34:59,990 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896426139] [2020-12-22 10:34:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:34:59,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:00,232 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 10:35:00,232 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896426139] [2020-12-22 10:35:00,233 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [430552321] [2020-12-22 10:35:00,233 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 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 10:35:00,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-12-22 10:35:00,323 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:00,324 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:00,326 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:00,369 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 10:35:00,370 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:00,370 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:35:00,370 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2018199037] [2020-12-22 10:35:00,371 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:35:00,371 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:00,371 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:35:00,372 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=372, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:35:00,372 INFO L87 Difference]: Start difference. First operand 104 states and 253 transitions. Second operand 22 states. [2020-12-22 10:35:01,333 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:01,333 INFO L93 Difference]: Finished difference Result 152 states and 351 transitions. [2020-12-22 10:35:01,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-12-22 10:35:01,334 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:35:01,334 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:01,335 INFO L225 Difference]: With dead ends: 152 [2020-12-22 10:35:01,335 INFO L226 Difference]: Without dead ends: 145 [2020-12-22 10:35:01,336 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 77 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 51 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 651 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=781, Invalid=1975, Unknown=0, NotChecked=0, Total=2756 [2020-12-22 10:35:01,336 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 145 states. [2020-12-22 10:35:01,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 145 to 106. [2020-12-22 10:35:01,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 106 states. [2020-12-22 10:35:01,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 259 transitions. [2020-12-22 10:35:01,340 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 259 transitions. Word has length 27 [2020-12-22 10:35:01,340 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:01,340 INFO L481 AbstractCegarLoop]: Abstraction has 106 states and 259 transitions. [2020-12-22 10:35:01,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:35:01,340 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 259 transitions. [2020-12-22 10:35:01,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:35:01,341 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:01,341 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:01,548 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:01,549 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:01,549 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:01,549 INFO L82 PathProgramCache]: Analyzing trace with hash -283935313, now seen corresponding path program 107 times [2020-12-22 10:35:01,550 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:01,550 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2090104160] [2020-12-22 10:35:01,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:01,557 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:01,772 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 10:35:01,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2090104160] [2020-12-22 10:35:01,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [63384656] [2020-12-22 10:35:01,773 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 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 10:35:01,855 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-12-22 10:35:01,855 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:01,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 24 conjunts are in the unsatisfiable core [2020-12-22 10:35:01,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:01,901 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 10:35:01,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:01,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:35:01,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585739534] [2020-12-22 10:35:01,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:35:01,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:01,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:35:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=100, Invalid=362, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:35:01,904 INFO L87 Difference]: Start difference. First operand 106 states and 259 transitions. Second operand 22 states. [2020-12-22 10:35:02,837 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:02,837 INFO L93 Difference]: Finished difference Result 150 states and 349 transitions. [2020-12-22 10:35:02,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 38 states. [2020-12-22 10:35:02,839 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:35:02,839 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:02,840 INFO L225 Difference]: With dead ends: 150 [2020-12-22 10:35:02,840 INFO L226 Difference]: Without dead ends: 143 [2020-12-22 10:35:02,840 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 79 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 729 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=884, Invalid=2086, Unknown=0, NotChecked=0, Total=2970 [2020-12-22 10:35:02,841 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-12-22 10:35:02,843 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 108. [2020-12-22 10:35:02,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 108 states. [2020-12-22 10:35:02,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 265 transitions. [2020-12-22 10:35:02,843 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 265 transitions. Word has length 27 [2020-12-22 10:35:02,844 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:02,844 INFO L481 AbstractCegarLoop]: Abstraction has 108 states and 265 transitions. [2020-12-22 10:35:02,844 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:35:02,844 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 265 transitions. [2020-12-22 10:35:02,844 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:35:02,844 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:02,844 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:03,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-12-22 10:35:03,057 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:03,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:03,058 INFO L82 PathProgramCache]: Analyzing trace with hash 406024247, now seen corresponding path program 108 times [2020-12-22 10:35:03,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:03,059 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [513545476] [2020-12-22 10:35:03,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:03,069 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:03,284 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 10:35:03,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [513545476] [2020-12-22 10:35:03,284 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1031433721] [2020-12-22 10:35:03,285 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 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 10:35:03,362 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-12-22 10:35:03,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-12-22 10:35:03,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 26 conjunts are in the unsatisfiable core [2020-12-22 10:35:03,365 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:03,398 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 10:35:03,399 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:03,399 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-12-22 10:35:03,399 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [66810989] [2020-12-22 10:35:03,399 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-12-22 10:35:03,399 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:03,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-12-22 10:35:03,400 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-12-22 10:35:03,400 INFO L87 Difference]: Start difference. First operand 108 states and 265 transitions. Second operand 22 states. [2020-12-22 10:35:04,438 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:04,438 INFO L93 Difference]: Finished difference Result 172 states and 405 transitions. [2020-12-22 10:35:04,439 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 10:35:04,439 INFO L78 Accepts]: Start accepts. Automaton has 22 states. Word has length 27 [2020-12-22 10:35:04,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:04,440 INFO L225 Difference]: With dead ends: 172 [2020-12-22 10:35:04,440 INFO L226 Difference]: Without dead ends: 164 [2020-12-22 10:35:04,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 81 GetRequests, 26 SyntacticMatches, 0 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 811 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=1003, Invalid=2189, Unknown=0, NotChecked=0, Total=3192 [2020-12-22 10:35:04,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-12-22 10:35:04,443 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 115. [2020-12-22 10:35:04,443 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-12-22 10:35:04,444 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 289 transitions. [2020-12-22 10:35:04,444 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 289 transitions. Word has length 27 [2020-12-22 10:35:04,444 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:04,444 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 289 transitions. [2020-12-22 10:35:04,444 INFO L482 AbstractCegarLoop]: Interpolant automaton has 22 states. [2020-12-22 10:35:04,444 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 289 transitions. [2020-12-22 10:35:04,445 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-12-22 10:35:04,445 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:04,445 INFO L422 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:04,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-12-22 10:35:04,661 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:04,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:04,661 INFO L82 PathProgramCache]: Analyzing trace with hash 406742331, now seen corresponding path program 109 times [2020-12-22 10:35:04,662 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:04,662 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131468229] [2020-12-22 10:35:04,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:04,671 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:04,923 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 10:35:04,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131468229] [2020-12-22 10:35:04,924 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007511794] [2020-12-22 10:35:04,924 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 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 10:35:04,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-12-22 10:35:04,984 INFO L263 TraceCheckSpWp]: Trace formula consists of 175 conjuncts, 25 conjunts are in the unsatisfiable core [2020-12-22 10:35:04,984 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-12-22 10:35:05,047 INFO L639 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-12-22 10:35:05,050 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 10:35:05,051 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-12-22 10:35:05,051 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-12-22 10:35:05,051 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076781783] [2020-12-22 10:35:05,051 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-12-22 10:35:05,051 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-12-22 10:35:05,052 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-12-22 10:35:05,052 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-12-22 10:35:05,052 INFO L87 Difference]: Start difference. First operand 115 states and 289 transitions. Second operand 24 states. [2020-12-22 10:35:06,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-12-22 10:35:06,436 INFO L93 Difference]: Finished difference Result 150 states and 358 transitions. [2020-12-22 10:35:06,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-12-22 10:35:06,437 INFO L78 Accepts]: Start accepts. Automaton has 24 states. Word has length 27 [2020-12-22 10:35:06,439 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-12-22 10:35:06,440 INFO L225 Difference]: With dead ends: 150 [2020-12-22 10:35:06,440 INFO L226 Difference]: Without dead ends: 137 [2020-12-22 10:35:06,441 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 25 SyntacticMatches, 0 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 924 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-12-22 10:35:06,441 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 137 states. [2020-12-22 10:35:06,445 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 137 to 110. [2020-12-22 10:35:06,445 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-12-22 10:35:06,445 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 273 transitions. [2020-12-22 10:35:06,446 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 273 transitions. Word has length 27 [2020-12-22 10:35:06,446 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-12-22 10:35:06,446 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 273 transitions. [2020-12-22 10:35:06,446 INFO L482 AbstractCegarLoop]: Interpolant automaton has 24 states. [2020-12-22 10:35:06,446 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 273 transitions. [2020-12-22 10:35:06,446 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-12-22 10:35:06,447 INFO L414 BasicCegarLoop]: Found error trace [2020-12-22 10:35:06,447 INFO L422 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-12-22 10:35:06,660 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-12-22 10:35:06,660 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-12-22 10:35:06,661 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-12-22 10:35:06,661 INFO L82 PathProgramCache]: Analyzing trace with hash 780243396, now seen corresponding path program 110 times [2020-12-22 10:35:06,661 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-12-22 10:35:06,661 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [577997026] [2020-12-22 10:35:06,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-12-22 10:35:06,673 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 10:35:06,673 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 10:35:06,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is sat [2020-12-22 10:35:06,722 INFO L221 TraceCheck]: Trace is feasible, we will do another trace check, this time with branch encoders. [2020-12-22 10:35:06,766 INFO L173 FreeRefinementEngine]: Strategy CAMEL found a feasible trace [2020-12-22 10:35:06,766 INFO L523 BasicCegarLoop]: Counterexample might be feasible [2020-12-22 10:35:06,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2020-12-22 10:35:06,875 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 22.12 10:35:06 BasicIcfg [2020-12-22 10:35:06,875 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-12-22 10:35:06,876 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2020-12-22 10:35:06,876 INFO L271 PluginConnector]: Initializing Witness Printer... [2020-12-22 10:35:06,876 INFO L275 PluginConnector]: Witness Printer initialized [2020-12-22 10:35:06,877 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 22.12 10:33:17" (3/4) ... [2020-12-22 10:35:06,880 INFO L131 WitnessPrinter]: Generating witness for reachability counterexample [2020-12-22 10:35:06,981 INFO L141 WitnessManager]: Wrote witness to /storage/repos/svcomp/c/pthread/triangular-longer-2.i-witness.graphml [2020-12-22 10:35:06,982 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2020-12-22 10:35:06,983 INFO L168 Benchmark]: Toolchain (without parser) took 110553.72 ms. Allocated memory was 156.2 MB in the beginning and 412.1 MB in the end (delta: 255.9 MB). Free memory was 130.8 MB in the beginning and 305.4 MB in the end (delta: -174.6 MB). Peak memory consumption was 81.4 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:06,984 INFO L168 Benchmark]: CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. [2020-12-22 10:35:06,984 INFO L168 Benchmark]: CACSL2BoogieTranslator took 709.08 ms. Allocated memory is still 156.2 MB. Free memory was 130.6 MB in the beginning and 138.0 MB in the end (delta: -7.4 MB). Peak memory consumption was 33.2 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:06,985 INFO L168 Benchmark]: Boogie Procedure Inliner took 47.48 ms. Allocated memory is still 156.2 MB. Free memory was 138.0 MB in the beginning and 135.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:06,985 INFO L168 Benchmark]: Boogie Preprocessor took 30.77 ms. Allocated memory is still 156.2 MB. Free memory was 135.9 MB in the beginning and 134.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:06,986 INFO L168 Benchmark]: RCFGBuilder took 551.83 ms. Allocated memory is still 156.2 MB. Free memory was 134.4 MB in the beginning and 114.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:06,986 INFO L168 Benchmark]: TraceAbstraction took 109100.77 ms. Allocated memory was 156.2 MB in the beginning and 412.1 MB in the end (delta: 255.9 MB). Free memory was 113.9 MB in the beginning and 313.8 MB in the end (delta: -199.8 MB). Peak memory consumption was 55.5 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:06,986 INFO L168 Benchmark]: Witness Printer took 105.70 ms. Allocated memory is still 412.1 MB. Free memory was 313.8 MB in the beginning and 305.4 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 MB. Max. memory is 8.0 GB. [2020-12-22 10:35:06,989 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.21 ms. Allocated memory is still 156.2 MB. Free memory is still 128.0 MB. There was no memory consumed. Max. memory is 8.0 GB. * CACSL2BoogieTranslator took 709.08 ms. Allocated memory is still 156.2 MB. Free memory was 130.6 MB in the beginning and 138.0 MB in the end (delta: -7.4 MB). Peak memory consumption was 33.2 MB. Max. memory is 8.0 GB. * Boogie Procedure Inliner took 47.48 ms. Allocated memory is still 156.2 MB. Free memory was 138.0 MB in the beginning and 135.9 MB in the end (delta: 2.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 8.0 GB. * Boogie Preprocessor took 30.77 ms. Allocated memory is still 156.2 MB. Free memory was 135.9 MB in the beginning and 134.9 MB in the end (delta: 1.0 MB). Peak memory consumption was 1.0 MB. Max. memory is 8.0 GB. * RCFGBuilder took 551.83 ms. Allocated memory is still 156.2 MB. Free memory was 134.4 MB in the beginning and 114.4 MB in the end (delta: 19.9 MB). Peak memory consumption was 19.9 MB. Max. memory is 8.0 GB. * TraceAbstraction took 109100.77 ms. Allocated memory was 156.2 MB in the beginning and 412.1 MB in the end (delta: 255.9 MB). Free memory was 113.9 MB in the beginning and 313.8 MB in the end (delta: -199.8 MB). Peak memory consumption was 55.5 MB. Max. memory is 8.0 GB. * Witness Printer took 105.70 ms. Allocated memory is still 412.1 MB. Free memory was 313.8 MB in the beginning and 305.4 MB in the end (delta: 8.4 MB). Peak memory consumption was 8.4 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: 0.2s, 20 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 3.2s, 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 - CounterExampleResult [Line: 722]: a call to reach_error is reachable a call to reach_error is reachable We found a FailurePath: [L694] 0 int i = 3, j = 6; [L712] 0 pthread_t id1, id2; [L713] FCALL, FORK 0 pthread_create(&id1, ((void *)0), t1, ((void *)0)) VAL [arg={0:0}, i=3, j=6] [L714] FCALL, FORK 0 pthread_create(&id2, ((void *)0), t2, ((void *)0)) VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L716] 0 int condI = i >= (2*10 +6); VAL [arg={0:0}, arg={0:0}, i=3, j=6] [L704] 2 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0] [L696] 1 int k = 0; VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=3, j=6, k=0, k=0] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=6, k=0, k=1] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=7, j=8, k=1, k=1] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=8, k=1, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=9, j=10, k=2, k=2] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=10, k=3, k=2] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=11, j=12, k=3, k=3] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=12, k=4, k=3] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=13, j=14, k=4, k=4] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=14, k=5, k=4] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=15, j=16, k=5, k=5] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=16, k=6, k=5] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=17, j=18, k=6, k=6] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=18, k=6, k=7] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=19, j=20, k=7, k=7] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=20, k=7, k=8] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=21, j=22, k=8, k=8] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=22, k=8, k=9] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=23, j=24, k=9, k=9] [L696] COND TRUE 1 k < 10 [L698] 1 i = j + 1 [L696] 1 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=24, k=9, k=10] [L704] COND TRUE 2 k < 10 [L706] 2 j = i + 1 [L704] 2 k++ VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] [L719] 0 int condJ = j >= (2*10 +6); [L721] COND TRUE 0 condI || condJ [L722] 0 reach_error() VAL [arg={0:0}, arg={0:0}, arg={0:0}, arg={0:0}, i=25, j=26, k=10, k=10] - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 56 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: UNSAFE, OverallTime: 108.8s, OverallIterations: 114, TraceHistogramMax: 10, AutomataDifference: 52.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 3.2s, HoareTripleCheckerStatistics: 1638 SDtfs, 6245 SDslu, 9457 SDs, 0 SdLazy, 10719 SolverSat, 6889 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 11.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 5711 GetRequests, 1969 SyntacticMatches, 0 SemanticMatches, 3742 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34261 ImplicationChecksByTransitivity, 51.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=115occurred in iteration=112, 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, 113 MinimizatonAttempts, 3325 StatesRemovedByMinimization, 113 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.0s SsaConstructionTime, 3.4s SatisfiabilityAnalysisTime, 21.1s InterpolantComputationTime, 4414 NumberOfCodeBlocks, 4414 NumberOfCodeBlocksAsserted, 536 NumberOfCheckSat, 4168 ConstructedInterpolants, 0 QuantifiedInterpolants, 384256 SizeOfPredicates, 1318 NumberOfNonLiveVariables, 14990 ConjunctsInSsa, 1976 ConjunctsInUnsatCore, 218 InterpolantComputations, 8 PerfectInterpolantSequences, 56/8040 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be incorrect! Received shutdown request...