/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf -i ../../../trunk/examples/svcomp/pthread/triangular-longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.2.0-60729f1 [2020-11-11 21:34:49,879 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-11-11 21:34:49,882 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-11-11 21:34:49,916 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-11-11 21:34:49,917 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-11-11 21:34:49,918 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-11-11 21:34:49,920 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-11-11 21:34:49,923 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-11-11 21:34:49,925 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-11-11 21:34:49,926 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-11-11 21:34:49,928 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-11-11 21:34:49,929 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-11-11 21:34:49,929 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-11-11 21:34:49,931 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-11-11 21:34:49,932 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-11-11 21:34:49,933 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-11-11 21:34:49,934 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-11-11 21:34:49,935 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-11-11 21:34:49,937 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-11-11 21:34:49,940 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-11-11 21:34:49,941 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-11-11 21:34:49,943 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-11-11 21:34:49,945 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-11-11 21:34:49,946 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-11-11 21:34:49,949 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-11-11 21:34:49,950 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-11-11 21:34:49,950 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-11-11 21:34:49,951 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-11-11 21:34:49,952 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-11-11 21:34:49,953 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-11-11 21:34:49,953 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-11-11 21:34:49,954 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-11-11 21:34:49,955 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-11-11 21:34:49,956 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-11-11 21:34:49,958 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-11-11 21:34:49,958 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-11-11 21:34:49,959 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-11-11 21:34:49,959 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-11-11 21:34:49,960 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-11-11 21:34:49,961 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-11-11 21:34:49,962 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-11-11 21:34:49,965 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/concurrent/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-SemanticLbe.epf [2020-11-11 21:34:50,019 INFO L113 SettingsManager]: Loading preferences was successful [2020-11-11 21:34:50,019 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-11-11 21:34:50,021 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-11-11 21:34:50,022 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-11-11 21:34:50,022 INFO L138 SettingsManager]: * Use SBE=true [2020-11-11 21:34:50,024 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-11-11 21:34:50,024 INFO L138 SettingsManager]: * sizeof long=4 [2020-11-11 21:34:50,024 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-11-11 21:34:50,025 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-11-11 21:34:50,025 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-11-11 21:34:50,025 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-11-11 21:34:50,026 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-11-11 21:34:50,026 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-11-11 21:34:50,026 INFO L138 SettingsManager]: * sizeof long double=12 [2020-11-11 21:34:50,026 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-11-11 21:34:50,027 INFO L138 SettingsManager]: * Use constant arrays=true [2020-11-11 21:34:50,028 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-11-11 21:34:50,028 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-11-11 21:34:50,029 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-11-11 21:34:50,029 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-11-11 21:34:50,029 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-11-11 21:34:50,029 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-11-11 21:34:50,030 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-11-11 21:34:50,030 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-11-11 21:34:50,030 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-11-11 21:34:50,031 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-11-11 21:34:50,031 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-11-11 21:34:50,031 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-11-11 21:34:50,031 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release [2020-11-11 21:34:50,467 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-11-11 21:34:50,495 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-11-11 21:34:50,498 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-11-11 21:34:50,499 INFO L271 PluginConnector]: Initializing CDTParser... [2020-11-11 21:34:50,500 INFO L275 PluginConnector]: CDTParser initialized [2020-11-11 21:34:50,501 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-11-11 21:34:50,581 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087874473/2bc805c215cd4c3a809ca8139a25ab68/FLAGea1ccd2d4 [2020-11-11 21:34:51,211 INFO L306 CDTParser]: Found 1 translation units. [2020-11-11 21:34:51,212 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/triangular-longer-1.i [2020-11-11 21:34:51,233 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087874473/2bc805c215cd4c3a809ca8139a25ab68/FLAGea1ccd2d4 [2020-11-11 21:34:51,497 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/087874473/2bc805c215cd4c3a809ca8139a25ab68 [2020-11-11 21:34:51,501 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-11-11 21:34:51,508 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-11-11 21:34:51,510 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-11-11 21:34:51,510 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-11-11 21:34:51,514 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-11-11 21:34:51,515 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:34:51" (1/1) ... [2020-11-11 21:34:51,518 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2b22c7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:51, skipping insertion in model container [2020-11-11 21:34:51,518 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 11.11 09:34:51" (1/1) ... [2020-11-11 21:34:51,528 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-11-11 21:34:51,593 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-11-11 21:34:51,981 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:34:51,996 INFO L203 MainTranslator]: Completed pre-run [2020-11-11 21:34:52,073 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-11-11 21:34:52,182 INFO L208 MainTranslator]: Completed translation [2020-11-11 21:34:52,183 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52 WrapperNode [2020-11-11 21:34:52,183 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-11-11 21:34:52,185 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-11-11 21:34:52,185 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-11-11 21:34:52,185 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-11-11 21:34:52,194 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,237 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,264 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-11-11 21:34:52,267 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-11-11 21:34:52,267 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-11-11 21:34:52,267 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-11-11 21:34:52,277 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,281 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,288 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,288 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,308 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,314 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,321 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (1/1) ... [2020-11-11 21:34:52,329 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-11-11 21:34:52,333 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-11-11 21:34:52,333 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-11-11 21:34:52,334 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-11-11 21:34:52,335 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (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 [2020-11-11 21:34:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-11-11 21:34:52,425 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-11-11 21:34:52,425 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-11-11 21:34:52,426 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-11-11 21:34:52,426 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-11-11 21:34:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-11-11 21:34:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-11-11 21:34:52,427 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-11-11 21:34:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-11-11 21:34:52,428 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-11-11 21:34:52,429 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-11-11 21:34:52,429 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-11-11 21:34:52,431 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-11-11 21:34:52,802 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-11-11 21:34:52,802 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-11-11 21:34:52,804 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:34:52 BoogieIcfgContainer [2020-11-11 21:34:52,804 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-11-11 21:34:52,806 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-11-11 21:34:52,806 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-11-11 21:34:52,810 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-11-11 21:34:52,810 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 11.11 09:34:51" (1/3) ... [2020-11-11 21:34:52,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab86afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:34:52, skipping insertion in model container [2020-11-11 21:34:52,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 11.11 09:34:52" (2/3) ... [2020-11-11 21:34:52,811 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@5ab86afe and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 11.11 09:34:52, skipping insertion in model container [2020-11-11 21:34:52,811 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 11.11 09:34:52" (3/3) ... [2020-11-11 21:34:52,813 INFO L111 eAbstractionObserver]: Analyzing ICFG triangular-longer-1.i [2020-11-11 21:34:52,827 WARN L168 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-11-11 21:34:52,828 INFO L179 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-11-11 21:34:52,831 INFO L191 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-11-11 21:34:52,831 INFO L351 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-11-11 21:34:52,858 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,859 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,859 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,859 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,859 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,860 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,860 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,860 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,860 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,860 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,861 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,861 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,861 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,861 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,862 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,862 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,862 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,862 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,863 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,863 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,863 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,863 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,864 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,864 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,864 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,864 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,865 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,865 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,865 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,865 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,866 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,866 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,866 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,866 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,866 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,867 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,867 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,867 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,867 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,868 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,868 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,868 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,868 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,868 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,869 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,869 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,869 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,869 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,870 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,870 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,871 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,873 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,873 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,874 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,874 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,880 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,880 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,881 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,881 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-11-11 21:34:52,883 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-11-11 21:34:52,896 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-11-11 21:34:52,918 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-11-11 21:34:52,919 INFO L378 AbstractCegarLoop]: Hoare is true [2020-11-11 21:34:52,919 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-11-11 21:34:52,919 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-11-11 21:34:52,919 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-11-11 21:34:52,919 INFO L382 AbstractCegarLoop]: Difference is false [2020-11-11 21:34:52,919 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-11-11 21:34:52,920 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-11-11 21:34:52,930 INFO L120 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-11-11 21:34:52,933 INFO L135 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:52,936 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:52,938 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 65 places, 64 transitions, 138 flow [2020-11-11 21:34:52,976 INFO L129 PetriNetUnfolder]: 6/62 cut-off events. [2020-11-11 21:34:52,977 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-11-11 21:34:52,982 INFO L84 FinitePrefix]: Finished finitePrefix Result has 69 conditions, 62 events. 6/62 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 98 event pairs, 0 based on Foata normal form. 0/55 useless extension candidates. Maximal degree in co-relation 46. Up to 2 conditions per place. [2020-11-11 21:34:52,985 INFO L116 LiptonReduction]: Number of co-enabled transitions 1144 [2020-11-11 21:34:53,357 WARN L193 SmtUtils]: Spent 113.00 ms on a formula simplification that was a NOOP. DAG size: 10 [2020-11-11 21:34:56,406 WARN L193 SmtUtils]: Spent 316.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-11-11 21:34:56,546 WARN L193 SmtUtils]: Spent 133.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-11 21:34:56,837 WARN L193 SmtUtils]: Spent 289.00 ms on a formula simplification. DAG size of input: 95 DAG size of output: 89 [2020-11-11 21:34:56,985 WARN L193 SmtUtils]: Spent 140.00 ms on a formula simplification that was a NOOP. DAG size: 85 [2020-11-11 21:34:56,991 INFO L131 LiptonReduction]: Checked pairs total: 1130 [2020-11-11 21:34:56,991 INFO L133 LiptonReduction]: Total number of compositions: 63 [2020-11-11 21:34:56,996 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-11-11 21:34:57,006 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,008 INFO L276 IsEmpty]: Start isEmpty. Operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,013 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-11-11 21:34:57,013 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:57,014 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-11-11 21:34:57,014 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:57,020 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:57,020 INFO L82 PathProgramCache]: Analyzing trace with hash -662580448, now seen corresponding path program 1 times [2020-11-11 21:34:57,030 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:57,030 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1800227487] [2020-11-11 21:34:57,031 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:57,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:57,233 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:57,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1800227487] [2020-11-11 21:34:57,235 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:57,235 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-11-11 21:34:57,236 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [705504130] [2020-11-11 21:34:57,240 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-11-11 21:34:57,240 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:57,255 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-11-11 21:34:57,256 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-11-11 21:34:57,259 INFO L87 Difference]: Start difference. First operand has 44 states, 42 states have (on average 2.9047619047619047) internal successors, (122), 43 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:57,335 INFO L93 Difference]: Finished difference Result 75 states and 190 transitions. [2020-11-11 21:34:57,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-11-11 21:34:57,337 INFO L78 Accepts]: Start accepts. Automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 6 [2020-11-11 21:34:57,338 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:57,348 INFO L225 Difference]: With dead ends: 75 [2020-11-11 21:34:57,348 INFO L226 Difference]: Without dead ends: 42 [2020-11-11 21:34:57,350 INFO L749 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 [2020-11-11 21:34:57,368 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2020-11-11 21:34:57,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2020-11-11 21:34:57,385 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.3902439024390243) internal successors, (98), 41 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 98 transitions. [2020-11-11 21:34:57,388 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 98 transitions. Word has length 6 [2020-11-11 21:34:57,389 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:57,389 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 98 transitions. [2020-11-11 21:34:57,389 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 4 states, 3 states have (on average 2.0) internal successors, (6), 3 states have internal predecessors, (6), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,389 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 98 transitions. [2020-11-11 21:34:57,390 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-11-11 21:34:57,390 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:57,390 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:57,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-11-11 21:34:57,390 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:57,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:57,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1697822740, now seen corresponding path program 1 times [2020-11-11 21:34:57,391 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:57,392 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673516851] [2020-11-11 21:34:57,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:57,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:57,507 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:57,507 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673516851] [2020-11-11 21:34:57,508 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:57,508 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-11-11 21:34:57,508 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924238067] [2020-11-11 21:34:57,510 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-11-11 21:34:57,510 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:57,511 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-11-11 21:34:57,511 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-11-11 21:34:57,512 INFO L87 Difference]: Start difference. First operand 42 states and 98 transitions. Second operand has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,557 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:57,557 INFO L93 Difference]: Finished difference Result 56 states and 130 transitions. [2020-11-11 21:34:57,558 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2020-11-11 21:34:57,558 INFO L78 Accepts]: Start accepts. Automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 8 [2020-11-11 21:34:57,558 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:57,560 INFO L225 Difference]: With dead ends: 56 [2020-11-11 21:34:57,560 INFO L226 Difference]: Without dead ends: 50 [2020-11-11 21:34:57,561 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=14, Invalid=16, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:57,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 50 states. [2020-11-11 21:34:57,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 50 to 42. [2020-11-11 21:34:57,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4390243902439024) internal successors, (100), 41 states have internal predecessors, (100), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 100 transitions. [2020-11-11 21:34:57,569 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 100 transitions. Word has length 8 [2020-11-11 21:34:57,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:57,572 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 100 transitions. [2020-11-11 21:34:57,573 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 5 states, 4 states have (on average 2.0) internal successors, (8), 4 states have internal predecessors, (8), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,573 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 100 transitions. [2020-11-11 21:34:57,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:57,573 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:57,574 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:57,574 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-11-11 21:34:57,574 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:57,575 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:57,575 INFO L82 PathProgramCache]: Analyzing trace with hash 479902737, now seen corresponding path program 1 times [2020-11-11 21:34:57,575 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:57,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [615039914] [2020-11-11 21:34:57,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:57,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:57,682 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:57,682 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [615039914] [2020-11-11 21:34:57,682 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:57,682 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:57,683 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901014518] [2020-11-11 21:34:57,684 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:57,684 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:57,685 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:57,685 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:57,685 INFO L87 Difference]: Start difference. First operand 42 states and 100 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,779 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:57,780 INFO L93 Difference]: Finished difference Result 78 states and 180 transitions. [2020-11-11 21:34:57,781 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:57,781 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:34:57,782 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:57,783 INFO L225 Difference]: With dead ends: 78 [2020-11-11 21:34:57,783 INFO L226 Difference]: Without dead ends: 71 [2020-11-11 21:34:57,784 INFO L749 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 [2020-11-11 21:34:57,785 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-11 21:34:57,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 46. [2020-11-11 21:34:57,792 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-11-11 21:34:57,793 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 10 [2020-11-11 21:34:57,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:57,793 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-11-11 21:34:57,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,794 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-11-11 21:34:57,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:57,795 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:57,795 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:57,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-11-11 21:34:57,795 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:57,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:57,796 INFO L82 PathProgramCache]: Analyzing trace with hash 479987367, now seen corresponding path program 2 times [2020-11-11 21:34:57,796 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:57,796 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417339661] [2020-11-11 21:34:57,796 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:57,816 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:57,875 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:57,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417339661] [2020-11-11 21:34:57,875 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:57,875 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:57,876 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125830400] [2020-11-11 21:34:57,876 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:57,876 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:57,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:57,877 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:57,877 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:57,954 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-11-11 21:34:57,954 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:34:57,955 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:34:57,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:57,956 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:34:57,956 INFO L226 Difference]: Without dead ends: 43 [2020-11-11 21:34:57,956 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:57,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-11 21:34:57,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-11-11 21:34:57,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.4242424242424243) internal successors, (80), 33 states have internal predecessors, (80), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 80 transitions. [2020-11-11 21:34:57,962 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 80 transitions. Word has length 10 [2020-11-11 21:34:57,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:57,963 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 80 transitions. [2020-11-11 21:34:57,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:57,963 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 80 transitions. [2020-11-11 21:34:57,964 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-11-11 21:34:57,964 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:57,964 INFO L494 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:57,964 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-11-11 21:34:57,964 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:57,965 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:57,965 INFO L82 PathProgramCache]: Analyzing trace with hash -1753602359, now seen corresponding path program 3 times [2020-11-11 21:34:57,965 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:57,965 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1345682720] [2020-11-11 21:34:57,965 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:58,030 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:58,030 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1345682720] [2020-11-11 21:34:58,031 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-11-11 21:34:58,031 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-11-11 21:34:58,031 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1352842785] [2020-11-11 21:34:58,031 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-11-11 21:34:58,032 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:58,032 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-11-11 21:34:58,032 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2020-11-11 21:34:58,033 INFO L87 Difference]: Start difference. First operand 34 states and 80 transitions. Second operand has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,148 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:58,148 INFO L93 Difference]: Finished difference Result 57 states and 133 transitions. [2020-11-11 21:34:58,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-11-11 21:34:58,149 INFO L78 Accepts]: Start accepts. Automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 10 [2020-11-11 21:34:58,150 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:58,150 INFO L225 Difference]: With dead ends: 57 [2020-11-11 21:34:58,150 INFO L226 Difference]: Without dead ends: 51 [2020-11-11 21:34:58,153 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=29, Invalid=43, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:34:58,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 51 states. [2020-11-11 21:34:58,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 51 to 40. [2020-11-11 21:34:58,163 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 40 states, 39 states have (on average 2.4871794871794872) internal successors, (97), 39 states have internal predecessors, (97), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 40 states to 40 states and 97 transitions. [2020-11-11 21:34:58,165 INFO L78 Accepts]: Start accepts. Automaton has 40 states and 97 transitions. Word has length 10 [2020-11-11 21:34:58,166 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:58,166 INFO L481 AbstractCegarLoop]: Abstraction has 40 states and 97 transitions. [2020-11-11 21:34:58,166 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 6 states, 5 states have (on average 2.0) internal successors, (10), 5 states have internal predecessors, (10), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,167 INFO L276 IsEmpty]: Start isEmpty. Operand 40 states and 97 transitions. [2020-11-11 21:34:58,169 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:58,170 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:58,170 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:58,170 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2020-11-11 21:34:58,170 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:58,170 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:58,171 INFO L82 PathProgramCache]: Analyzing trace with hash 1994728946, now seen corresponding path program 4 times [2020-11-11 21:34:58,171 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:58,172 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617165613] [2020-11-11 21:34:58,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:58,189 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:58,234 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:58,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617165613] [2020-11-11 21:34:58,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1052666906] [2020-11-11 21:34:58,235 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:58,303 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:34:58,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:58,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:58,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:58,523 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:34:58,559 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:58,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:58,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-11 21:34:58,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903308263] [2020-11-11 21:34:58,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:58,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:58,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:58,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:34:58,562 INFO L87 Difference]: Start difference. First operand 40 states and 97 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,679 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:58,679 INFO L93 Difference]: Finished difference Result 48 states and 117 transitions. [2020-11-11 21:34:58,679 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:58,680 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:34:58,680 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:58,681 INFO L225 Difference]: With dead ends: 48 [2020-11-11 21:34:58,681 INFO L226 Difference]: Without dead ends: 43 [2020-11-11 21:34:58,681 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 14 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=59, Invalid=97, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:34:58,682 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 43 states. [2020-11-11 21:34:58,686 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 43 to 34. [2020-11-11 21:34:58,686 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 34 states, 33 states have (on average 2.484848484848485) internal successors, (82), 33 states have internal predecessors, (82), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 34 states to 34 states and 82 transitions. [2020-11-11 21:34:58,687 INFO L78 Accepts]: Start accepts. Automaton has 34 states and 82 transitions. Word has length 11 [2020-11-11 21:34:58,687 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:58,687 INFO L481 AbstractCegarLoop]: Abstraction has 34 states and 82 transitions. [2020-11-11 21:34:58,687 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:58,687 INFO L276 IsEmpty]: Start isEmpty. Operand 34 states and 82 transitions. [2020-11-11 21:34:58,688 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:58,688 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:58,688 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:58,900 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 2 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable5 [2020-11-11 21:34:58,901 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:58,902 INFO L82 PathProgramCache]: Analyzing trace with hash 1390880661, now seen corresponding path program 5 times [2020-11-11 21:34:58,902 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:58,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [214540511] [2020-11-11 21:34:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:58,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:58,998 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:58,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [214540511] [2020-11-11 21:34:59,002 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [126819922] [2020-11-11 21:34:59,002 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:59,071 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:34:59,071 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:59,072 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:59,073 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:59,103 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:59,106 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:59,106 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 5 [2020-11-11 21:34:59,106 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1986939307] [2020-11-11 21:34:59,107 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-11-11 21:34:59,107 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:59,107 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-11-11 21:34:59,108 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-11-11 21:34:59,108 INFO L87 Difference]: Start difference. First operand 34 states and 82 transitions. Second operand has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,184 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:59,184 INFO L93 Difference]: Finished difference Result 54 states and 125 transitions. [2020-11-11 21:34:59,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-11-11 21:34:59,185 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:34:59,185 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:59,186 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:34:59,186 INFO L226 Difference]: Without dead ends: 48 [2020-11-11 21:34:59,186 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 10 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=33, Invalid=57, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:34:59,187 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 48 states. [2020-11-11 21:34:59,197 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 48 to 42. [2020-11-11 21:34:59,197 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4634146341463414) internal successors, (101), 41 states have internal predecessors, (101), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 101 transitions. [2020-11-11 21:34:59,201 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 101 transitions. Word has length 11 [2020-11-11 21:34:59,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:59,202 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 101 transitions. [2020-11-11 21:34:59,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 7 states, 6 states have (on average 1.8333333333333333) internal successors, (11), 6 states have internal predecessors, (11), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,202 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 101 transitions. [2020-11-11 21:34:59,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-11-11 21:34:59,203 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:59,203 INFO L494 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:59,415 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:59,416 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:59,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:59,417 INFO L82 PathProgramCache]: Analyzing trace with hash 1472928981, now seen corresponding path program 6 times [2020-11-11 21:34:59,418 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:59,419 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375151133] [2020-11-11 21:34:59,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:34:59,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:34:59,514 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:59,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375151133] [2020-11-11 21:34:59,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [361979110] [2020-11-11 21:34:59,515 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:59,569 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-11-11 21:34:59,570 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:34:59,570 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 7 conjunts are in the unsatisfiable core [2020-11-11 21:34:59,571 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:34:59,592 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:34:59,602 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:34:59,603 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:34:59,603 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 6 [2020-11-11 21:34:59,603 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2040603326] [2020-11-11 21:34:59,604 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:34:59,604 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:34:59,604 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:34:59,605 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:34:59,605 INFO L87 Difference]: Start difference. First operand 42 states and 101 transitions. Second operand has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,765 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:34:59,765 INFO L93 Difference]: Finished difference Result 66 states and 155 transitions. [2020-11-11 21:34:59,766 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-11-11 21:34:59,766 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 11 [2020-11-11 21:34:59,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:34:59,767 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:34:59,767 INFO L226 Difference]: Without dead ends: 57 [2020-11-11 21:34:59,767 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 8 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:34:59,768 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 57 states. [2020-11-11 21:34:59,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 57 to 43. [2020-11-11 21:34:59,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 43 states, 42 states have (on average 2.5) internal successors, (105), 42 states have internal predecessors, (105), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 43 states to 43 states and 105 transitions. [2020-11-11 21:34:59,773 INFO L78 Accepts]: Start accepts. Automaton has 43 states and 105 transitions. Word has length 11 [2020-11-11 21:34:59,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:34:59,773 INFO L481 AbstractCegarLoop]: Abstraction has 43 states and 105 transitions. [2020-11-11 21:34:59,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.8571428571428572) internal successors, (13), 7 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:34:59,773 INFO L276 IsEmpty]: Start isEmpty. Operand 43 states and 105 transitions. [2020-11-11 21:34:59,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:34:59,774 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:34:59,774 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:34:59,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:34:59,987 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:34:59,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:34:59,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1625034124, now seen corresponding path program 7 times [2020-11-11 21:34:59,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:34:59,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1995524323] [2020-11-11 21:34:59,990 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:00,002 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:00,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:00,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1995524323] [2020-11-11 21:35:00,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1447799849] [2020-11-11 21:35:00,060 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:00,116 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:00,117 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:35:00,118 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:00,134 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:00,134 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:00,135 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 6 [2020-11-11 21:35:00,135 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917380617] [2020-11-11 21:35:00,135 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-11-11 21:35:00,135 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:00,136 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-11-11 21:35:00,136 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2020-11-11 21:35:00,136 INFO L87 Difference]: Start difference. First operand 43 states and 105 transitions. Second operand has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,242 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:00,242 INFO L93 Difference]: Finished difference Result 64 states and 147 transitions. [2020-11-11 21:35:00,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:35:00,243 INFO L78 Accepts]: Start accepts. Automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:35:00,243 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:00,244 INFO L225 Difference]: With dead ends: 64 [2020-11-11 21:35:00,244 INFO L226 Difference]: Without dead ends: 58 [2020-11-11 21:35:00,244 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 16 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:35:00,245 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-11 21:35:00,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 45. [2020-11-11 21:35:00,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.477272727272727) internal successors, (109), 44 states have internal predecessors, (109), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 109 transitions. [2020-11-11 21:35:00,254 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 109 transitions. Word has length 12 [2020-11-11 21:35:00,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:00,254 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 109 transitions. [2020-11-11 21:35:00,255 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 8 states, 7 states have (on average 1.7142857142857142) internal successors, (12), 7 states have internal predecessors, (12), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,255 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 109 transitions. [2020-11-11 21:35:00,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:35:00,256 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:00,256 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:00,467 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:00,468 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:00,468 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:00,468 INFO L82 PathProgramCache]: Analyzing trace with hash 1707082444, now seen corresponding path program 8 times [2020-11-11 21:35:00,468 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:00,469 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785579160] [2020-11-11 21:35:00,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:00,500 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:00,566 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:00,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785579160] [2020-11-11 21:35:00,567 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [777688151] [2020-11-11 21:35:00,567 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:00,617 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:00,618 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:00,619 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:35:00,620 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:00,659 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:00,671 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:00,672 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:00,672 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-11 21:35:00,672 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [679125569] [2020-11-11 21:35:00,672 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:35:00,673 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:00,673 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:35:00,673 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:35:00,674 INFO L87 Difference]: Start difference. First operand 45 states and 109 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,911 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:00,912 INFO L93 Difference]: Finished difference Result 61 states and 145 transitions. [2020-11-11 21:35:00,912 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:35:00,912 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:35:00,912 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:00,913 INFO L225 Difference]: With dead ends: 61 [2020-11-11 21:35:00,913 INFO L226 Difference]: Without dead ends: 52 [2020-11-11 21:35:00,914 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=105, Invalid=201, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:35:00,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 52 states. [2020-11-11 21:35:00,921 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 52 to 37. [2020-11-11 21:35:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 37 states, 36 states have (on average 2.4444444444444446) internal successors, (88), 36 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,922 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 37 states to 37 states and 88 transitions. [2020-11-11 21:35:00,923 INFO L78 Accepts]: Start accepts. Automaton has 37 states and 88 transitions. Word has length 12 [2020-11-11 21:35:00,923 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:00,923 INFO L481 AbstractCegarLoop]: Abstraction has 37 states and 88 transitions. [2020-11-11 21:35:00,926 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:00,926 INFO L276 IsEmpty]: Start isEmpty. Operand 37 states and 88 transitions. [2020-11-11 21:35:00,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-11-11 21:35:00,927 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:00,927 INFO L494 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:01,127 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-11-11 21:35:01,128 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:01,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:01,129 INFO L82 PathProgramCache]: Analyzing trace with hash -1583819388, now seen corresponding path program 9 times [2020-11-11 21:35:01,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:01,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051363281] [2020-11-11 21:35:01,130 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:01,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:01,204 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:01,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051363281] [2020-11-11 21:35:01,205 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1816967093] [2020-11-11 21:35:01,205 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:01,287 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-11-11 21:35:01,287 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:01,287 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 8 conjunts are in the unsatisfiable core [2020-11-11 21:35:01,289 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:01,307 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:01,318 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:01,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-11-11 21:35:01,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148733872] [2020-11-11 21:35:01,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:35:01,319 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:01,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:35:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:35:01,320 INFO L87 Difference]: Start difference. First operand 37 states and 88 transitions. Second operand has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:01,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:01,503 INFO L93 Difference]: Finished difference Result 60 states and 143 transitions. [2020-11-11 21:35:01,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:35:01,504 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 12 [2020-11-11 21:35:01,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:01,504 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:35:01,504 INFO L226 Difference]: Without dead ends: 55 [2020-11-11 21:35:01,505 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=110, Invalid=196, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:35:01,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-11 21:35:01,511 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 46. [2020-11-11 21:35:01,511 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.511111111111111) internal successors, (113), 45 states have internal predecessors, (113), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:01,512 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 113 transitions. [2020-11-11 21:35:01,512 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 113 transitions. Word has length 12 [2020-11-11 21:35:01,512 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:01,513 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 113 transitions. [2020-11-11 21:35:01,513 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.75) internal successors, (14), 8 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:01,513 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 113 transitions. [2020-11-11 21:35:01,513 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:35:01,513 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:01,514 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:01,726 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:01,727 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:01,727 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:01,728 INFO L82 PathProgramCache]: Analyzing trace with hash 1379970669, now seen corresponding path program 10 times [2020-11-11 21:35:01,728 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:01,728 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2139603045] [2020-11-11 21:35:01,729 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:01,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:01,809 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:01,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2139603045] [2020-11-11 21:35:01,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040040494] [2020-11-11 21:35:01,810 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:01,869 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:01,869 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:01,870 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:35:01,871 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:01,890 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:01,901 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:01,901 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:01,901 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-11 21:35:01,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [712972839] [2020-11-11 21:35:01,902 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:35:01,902 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:01,902 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:35:01,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=65, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:35:01,903 INFO L87 Difference]: Start difference. First operand 46 states and 113 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:02,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:02,114 INFO L93 Difference]: Finished difference Result 54 states and 133 transitions. [2020-11-11 21:35:02,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:35:02,114 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:35:02,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:02,115 INFO L225 Difference]: With dead ends: 54 [2020-11-11 21:35:02,115 INFO L226 Difference]: Without dead ends: 49 [2020-11-11 21:35:02,116 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=121, Invalid=221, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:35:02,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 49 states. [2020-11-11 21:35:02,119 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 49 to 38. [2020-11-11 21:35:02,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 38 states, 37 states have (on average 2.4864864864864864) internal successors, (92), 37 states have internal predecessors, (92), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:02,120 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 38 states to 38 states and 92 transitions. [2020-11-11 21:35:02,120 INFO L78 Accepts]: Start accepts. Automaton has 38 states and 92 transitions. Word has length 13 [2020-11-11 21:35:02,120 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:02,120 INFO L481 AbstractCegarLoop]: Abstraction has 38 states and 92 transitions. [2020-11-11 21:35:02,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:02,120 INFO L276 IsEmpty]: Start isEmpty. Operand 38 states and 92 transitions. [2020-11-11 21:35:02,121 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:35:02,121 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:02,121 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:02,330 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:02,331 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:02,332 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:02,332 INFO L82 PathProgramCache]: Analyzing trace with hash 901490704, now seen corresponding path program 11 times [2020-11-11 21:35:02,332 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:02,333 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113137539] [2020-11-11 21:35:02,333 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:02,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:02,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:02,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113137539] [2020-11-11 21:35:02,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [583497881] [2020-11-11 21:35:02,430 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:02,484 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-11-11 21:35:02,485 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:02,485 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:35:02,486 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:02,504 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:02,505 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:02,505 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 7 [2020-11-11 21:35:02,505 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320581557] [2020-11-11 21:35:02,505 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-11-11 21:35:02,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:02,506 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-11-11 21:35:02,506 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2020-11-11 21:35:02,506 INFO L87 Difference]: Start difference. First operand 38 states and 92 transitions. Second operand has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:02,632 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:02,632 INFO L93 Difference]: Finished difference Result 60 states and 139 transitions. [2020-11-11 21:35:02,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-11-11 21:35:02,633 INFO L78 Accepts]: Start accepts. Automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:35:02,633 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:02,634 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:35:02,634 INFO L226 Difference]: Without dead ends: 54 [2020-11-11 21:35:02,635 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:35:02,636 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-11-11 21:35:02,638 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 46. [2020-11-11 21:35:02,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.466666666666667) internal successors, (111), 45 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:02,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 111 transitions. [2020-11-11 21:35:02,639 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 111 transitions. Word has length 13 [2020-11-11 21:35:02,640 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:02,640 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 111 transitions. [2020-11-11 21:35:02,640 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 9 states, 8 states have (on average 1.625) internal successors, (13), 8 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:02,640 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 111 transitions. [2020-11-11 21:35:02,640 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-11-11 21:35:02,641 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:02,641 INFO L494 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:02,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-11-11 21:35:02,852 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:02,853 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:02,853 INFO L82 PathProgramCache]: Analyzing trace with hash -1853733510, now seen corresponding path program 12 times [2020-11-11 21:35:02,853 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:02,853 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [470307232] [2020-11-11 21:35:02,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:02,866 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:02,942 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:02,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [470307232] [2020-11-11 21:35:02,943 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008111537] [2020-11-11 21:35:02,943 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:02,995 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-11-11 21:35:02,997 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:02,999 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 9 conjunts are in the unsatisfiable core [2020-11-11 21:35:03,000 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:03,032 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:03,042 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:03,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:03,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 8 [2020-11-11 21:35:03,044 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602581659] [2020-11-11 21:35:03,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:35:03,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:03,045 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:35:03,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:35:03,045 INFO L87 Difference]: Start difference. First operand 46 states and 111 transitions. Second operand has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:03,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:03,320 INFO L93 Difference]: Finished difference Result 75 states and 177 transitions. [2020-11-11 21:35:03,320 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:35:03,321 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2020-11-11 21:35:03,321 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:03,322 INFO L225 Difference]: With dead ends: 75 [2020-11-11 21:35:03,322 INFO L226 Difference]: Without dead ends: 66 [2020-11-11 21:35:03,322 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=139, Invalid=281, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:35:03,323 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-11 21:35:03,326 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 49. [2020-11-11 21:35:03,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.5208333333333335) internal successors, (121), 48 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:03,329 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 121 transitions. [2020-11-11 21:35:03,329 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 121 transitions. Word has length 13 [2020-11-11 21:35:03,330 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:03,330 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 121 transitions. [2020-11-11 21:35:03,330 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.6666666666666667) internal successors, (15), 9 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:03,333 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 121 transitions. [2020-11-11 21:35:03,334 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:35:03,334 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:03,334 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:03,546 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:03,547 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:03,548 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:03,548 INFO L82 PathProgramCache]: Analyzing trace with hash -1710298041, now seen corresponding path program 13 times [2020-11-11 21:35:03,548 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:03,549 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191788406] [2020-11-11 21:35:03,550 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:03,563 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:03,639 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:03,639 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191788406] [2020-11-11 21:35:03,640 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [426408294] [2020-11-11 21:35:03,640 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:35:03,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:03,701 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:35:03,703 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:03,751 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:03,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:03,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 8 [2020-11-11 21:35:03,751 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1651427870] [2020-11-11 21:35:03,752 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-11-11 21:35:03,752 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:03,753 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-11-11 21:35:03,753 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=66, Unknown=0, NotChecked=0, Total=90 [2020-11-11 21:35:03,753 INFO L87 Difference]: Start difference. First operand 49 states and 121 transitions. Second operand has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:03,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:03,899 INFO L93 Difference]: Finished difference Result 74 states and 171 transitions. [2020-11-11 21:35:03,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:35:03,899 INFO L78 Accepts]: Start accepts. Automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:35:03,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:03,900 INFO L225 Difference]: With dead ends: 74 [2020-11-11 21:35:03,900 INFO L226 Difference]: Without dead ends: 68 [2020-11-11 21:35:03,903 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:35:03,904 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-11 21:35:03,912 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 51. [2020-11-11 21:35:03,912 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 51 states, 50 states have (on average 2.5) internal successors, (125), 50 states have internal predecessors, (125), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:03,913 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 51 states to 51 states and 125 transitions. [2020-11-11 21:35:03,913 INFO L78 Accepts]: Start accepts. Automaton has 51 states and 125 transitions. Word has length 14 [2020-11-11 21:35:03,913 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:03,913 INFO L481 AbstractCegarLoop]: Abstraction has 51 states and 125 transitions. [2020-11-11 21:35:03,914 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 10 states, 9 states have (on average 1.5555555555555556) internal successors, (14), 9 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:03,914 INFO L276 IsEmpty]: Start isEmpty. Operand 51 states and 125 transitions. [2020-11-11 21:35:03,917 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:35:03,917 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:03,917 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:04,118 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-11-11 21:35:04,119 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:04,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:04,120 INFO L82 PathProgramCache]: Analyzing trace with hash -170554959, now seen corresponding path program 14 times [2020-11-11 21:35:04,120 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:04,120 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729591470] [2020-11-11 21:35:04,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:04,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:04,206 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:04,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729591470] [2020-11-11 21:35:04,207 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [502564279] [2020-11-11 21:35:04,207 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:04,258 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:04,258 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:04,259 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:35:04,261 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:04,305 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:04,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:04,305 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 21:35:04,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [365799189] [2020-11-11 21:35:04,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:35:04,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:04,307 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:35:04,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:35:04,307 INFO L87 Difference]: Start difference. First operand 51 states and 125 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:04,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:04,574 INFO L93 Difference]: Finished difference Result 67 states and 161 transitions. [2020-11-11 21:35:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-11-11 21:35:04,575 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:35:04,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:04,576 INFO L225 Difference]: With dead ends: 67 [2020-11-11 21:35:04,576 INFO L226 Difference]: Without dead ends: 58 [2020-11-11 21:35:04,576 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 80 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=321, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:35:04,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2020-11-11 21:35:04,580 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 41. [2020-11-11 21:35:04,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 41 states, 40 states have (on average 2.45) internal successors, (98), 40 states have internal predecessors, (98), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:04,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 41 states to 41 states and 98 transitions. [2020-11-11 21:35:04,586 INFO L78 Accepts]: Start accepts. Automaton has 41 states and 98 transitions. Word has length 14 [2020-11-11 21:35:04,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:04,586 INFO L481 AbstractCegarLoop]: Abstraction has 41 states and 98 transitions. [2020-11-11 21:35:04,586 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:04,586 INFO L276 IsEmpty]: Start isEmpty. Operand 41 states and 98 transitions. [2020-11-11 21:35:04,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-11-11 21:35:04,587 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:04,587 INFO L494 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:04,795 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-11-11 21:35:04,796 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:04,796 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:04,797 INFO L82 PathProgramCache]: Analyzing trace with hash -1631141505, now seen corresponding path program 15 times [2020-11-11 21:35:04,797 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:04,798 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [517618287] [2020-11-11 21:35:04,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:04,808 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:04,872 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:04,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [517618287] [2020-11-11 21:35:04,873 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1390826348] [2020-11-11 21:35:04,873 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:04,930 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-11-11 21:35:04,930 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:04,931 INFO L263 TraceCheckSpWp]: Trace formula consists of 108 conjuncts, 10 conjunts are in the unsatisfiable core [2020-11-11 21:35:04,932 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:04,957 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:04,973 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:04,974 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:04,974 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-11-11 21:35:04,974 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1261032409] [2020-11-11 21:35:04,975 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:35:04,975 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:04,975 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:35:04,976 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=81, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:35:04,976 INFO L87 Difference]: Start difference. First operand 41 states and 98 transitions. Second operand has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:05,250 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:05,250 INFO L93 Difference]: Finished difference Result 68 states and 163 transitions. [2020-11-11 21:35:05,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:35:05,251 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2020-11-11 21:35:05,251 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:05,252 INFO L225 Difference]: With dead ends: 68 [2020-11-11 21:35:05,252 INFO L226 Difference]: Without dead ends: 63 [2020-11-11 21:35:05,252 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=193, Invalid=359, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:35:05,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 63 states. [2020-11-11 21:35:05,257 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 63 to 52. [2020-11-11 21:35:05,257 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.5294117647058822) internal successors, (129), 51 states have internal predecessors, (129), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:05,258 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 129 transitions. [2020-11-11 21:35:05,258 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 129 transitions. Word has length 14 [2020-11-11 21:35:05,258 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:05,258 INFO L481 AbstractCegarLoop]: Abstraction has 52 states and 129 transitions. [2020-11-11 21:35:05,258 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.6) internal successors, (16), 10 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:05,259 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 129 transitions. [2020-11-11 21:35:05,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:35:05,259 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:05,259 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:05,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-11-11 21:35:05,471 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:05,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:05,472 INFO L82 PathProgramCache]: Analyzing trace with hash -992213976, now seen corresponding path program 16 times [2020-11-11 21:35:05,472 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:05,473 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2104698290] [2020-11-11 21:35:05,473 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:05,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:05,543 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:05,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2104698290] [2020-11-11 21:35:05,544 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542592787] [2020-11-11 21:35:05,544 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:05,599 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:05,599 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:05,600 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:35:05,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:05,625 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:05,640 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:05,641 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:05,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 21:35:05,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719154267] [2020-11-11 21:35:05,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:35:05,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:05,642 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:35:05,642 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:35:05,642 INFO L87 Difference]: Start difference. First operand 52 states and 129 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:05,956 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:05,957 INFO L93 Difference]: Finished difference Result 60 states and 149 transitions. [2020-11-11 21:35:05,957 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:35:05,957 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:35:05,958 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:05,958 INFO L225 Difference]: With dead ends: 60 [2020-11-11 21:35:05,958 INFO L226 Difference]: Without dead ends: 55 [2020-11-11 21:35:05,959 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 114 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=205, Invalid=395, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:35:05,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 55 states. [2020-11-11 21:35:05,962 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 55 to 42. [2020-11-11 21:35:05,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.4878048780487805) internal successors, (102), 41 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:05,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 102 transitions. [2020-11-11 21:35:05,963 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 102 transitions. Word has length 15 [2020-11-11 21:35:05,963 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:05,963 INFO L481 AbstractCegarLoop]: Abstraction has 42 states and 102 transitions. [2020-11-11 21:35:05,963 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:05,963 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 102 transitions. [2020-11-11 21:35:05,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:35:05,964 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:05,964 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:06,172 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-11-11 21:35:06,173 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:06,173 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:06,174 INFO L82 PathProgramCache]: Analyzing trace with hash -1250822709, now seen corresponding path program 17 times [2020-11-11 21:35:06,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:06,174 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857832733] [2020-11-11 21:35:06,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:06,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:06,258 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857832733] [2020-11-11 21:35:06,259 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1470296948] [2020-11-11 21:35:06,259 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:06,304 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-11-11 21:35:06,304 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:06,305 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 11 conjunts are in the unsatisfiable core [2020-11-11 21:35:06,306 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:06,322 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:06,322 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:06,322 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 9 [2020-11-11 21:35:06,322 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418775616] [2020-11-11 21:35:06,323 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-11-11 21:35:06,323 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:06,324 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-11-11 21:35:06,324 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=32, Invalid=78, Unknown=0, NotChecked=0, Total=110 [2020-11-11 21:35:06,324 INFO L87 Difference]: Start difference. First operand 42 states and 102 transitions. Second operand has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:06,455 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:06,456 INFO L93 Difference]: Finished difference Result 66 states and 153 transitions. [2020-11-11 21:35:06,456 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-11-11 21:35:06,456 INFO L78 Accepts]: Start accepts. Automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:35:06,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:06,457 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:35:06,457 INFO L226 Difference]: Without dead ends: 60 [2020-11-11 21:35:06,458 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:35:06,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 60 states. [2020-11-11 21:35:06,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 60 to 50. [2020-11-11 21:35:06,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.4693877551020407) internal successors, (121), 49 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:06,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 121 transitions. [2020-11-11 21:35:06,462 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 121 transitions. Word has length 15 [2020-11-11 21:35:06,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:06,462 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 121 transitions. [2020-11-11 21:35:06,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 11 states, 10 states have (on average 1.5) internal successors, (15), 10 states have internal predecessors, (15), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:06,462 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 121 transitions. [2020-11-11 21:35:06,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2020-11-11 21:35:06,463 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:06,463 INFO L494 BasicCegarLoop]: trace histogram [4, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:06,670 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:06,671 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:06,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:06,672 INFO L82 PathProgramCache]: Analyzing trace with hash 974248159, now seen corresponding path program 18 times [2020-11-11 21:35:06,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:06,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991311262] [2020-11-11 21:35:06,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:06,691 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:06,762 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:06,762 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991311262] [2020-11-11 21:35:06,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1584149341] [2020-11-11 21:35:06,763 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:06,823 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-11-11 21:35:06,823 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:06,824 INFO L263 TraceCheckSpWp]: Trace formula consists of 113 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:35:06,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:06,869 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:06,870 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:06,870 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 10 [2020-11-11 21:35:06,870 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206847587] [2020-11-11 21:35:06,870 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:35:06,871 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:06,871 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:35:06,871 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=99, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:35:06,872 INFO L87 Difference]: Start difference. First operand 50 states and 121 transitions. Second operand has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:07,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:07,220 INFO L93 Difference]: Finished difference Result 85 states and 201 transitions. [2020-11-11 21:35:07,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-11-11 21:35:07,220 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2020-11-11 21:35:07,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:07,221 INFO L225 Difference]: With dead ends: 85 [2020-11-11 21:35:07,221 INFO L226 Difference]: Without dead ends: 76 [2020-11-11 21:35:07,222 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-11-11 21:35:07,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 76 states. [2020-11-11 21:35:07,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 76 to 55. [2020-11-11 21:35:07,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 55 states, 54 states have (on average 2.537037037037037) internal successors, (137), 54 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:07,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 137 transitions. [2020-11-11 21:35:07,225 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 137 transitions. Word has length 15 [2020-11-11 21:35:07,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:07,225 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 137 transitions. [2020-11-11 21:35:07,225 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.5454545454545454) internal successors, (17), 11 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:07,225 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 137 transitions. [2020-11-11 21:35:07,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:35:07,226 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:07,226 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:07,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:07,436 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:07,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:07,436 INFO L82 PathProgramCache]: Analyzing trace with hash 1376061506, now seen corresponding path program 19 times [2020-11-11 21:35:07,437 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:07,437 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [777726786] [2020-11-11 21:35:07,437 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:07,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:07,538 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:07,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [777726786] [2020-11-11 21:35:07,538 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2007671569] [2020-11-11 21:35:07,538 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:07,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:07,602 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:35:07,604 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:07,620 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:07,620 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:07,620 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 10 [2020-11-11 21:35:07,620 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874693429] [2020-11-11 21:35:07,621 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-11-11 21:35:07,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:07,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-11-11 21:35:07,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=98, Unknown=0, NotChecked=0, Total=132 [2020-11-11 21:35:07,621 INFO L87 Difference]: Start difference. First operand 55 states and 137 transitions. Second operand has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:07,788 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:07,789 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-11-11 21:35:07,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:35:07,789 INFO L78 Accepts]: Start accepts. Automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2020-11-11 21:35:07,789 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:07,790 INFO L225 Difference]: With dead ends: 84 [2020-11-11 21:35:07,790 INFO L226 Difference]: Without dead ends: 78 [2020-11-11 21:35:07,791 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 60 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:35:07,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-11 21:35:07,793 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 57. [2020-11-11 21:35:07,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.517857142857143) internal successors, (141), 56 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:07,794 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 141 transitions. [2020-11-11 21:35:07,794 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 141 transitions. Word has length 16 [2020-11-11 21:35:07,794 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:07,794 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 141 transitions. [2020-11-11 21:35:07,794 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 12 states, 11 states have (on average 1.4545454545454546) internal successors, (16), 11 states have internal predecessors, (16), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:07,795 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 141 transitions. [2020-11-11 21:35:07,795 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:35:07,795 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:07,795 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:08,005 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:08,006 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:08,006 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:08,007 INFO L82 PathProgramCache]: Analyzing trace with hash -693834922, now seen corresponding path program 20 times [2020-11-11 21:35:08,007 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:08,007 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [124313273] [2020-11-11 21:35:08,008 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:08,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:08,127 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:08,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [124313273] [2020-11-11 21:35:08,127 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626996876] [2020-11-11 21:35:08,128 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:08,184 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:08,185 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:08,186 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:35:08,187 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:08,212 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:08,231 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:08,231 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:08,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 21:35:08,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410997936] [2020-11-11 21:35:08,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:35:08,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:08,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:35:08,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=118, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:35:08,233 INFO L87 Difference]: Start difference. First operand 57 states and 141 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:08,656 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:08,656 INFO L93 Difference]: Finished difference Result 77 states and 185 transitions. [2020-11-11 21:35:08,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-11-11 21:35:08,657 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2020-11-11 21:35:08,657 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:08,657 INFO L225 Difference]: With dead ends: 77 [2020-11-11 21:35:08,657 INFO L226 Difference]: Without dead ends: 68 [2020-11-11 21:35:08,659 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=281, Invalid=589, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:35:08,660 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2020-11-11 21:35:08,661 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 45. [2020-11-11 21:35:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 45 states, 44 states have (on average 2.4545454545454546) internal successors, (108), 44 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 45 states to 45 states and 108 transitions. [2020-11-11 21:35:08,662 INFO L78 Accepts]: Start accepts. Automaton has 45 states and 108 transitions. Word has length 16 [2020-11-11 21:35:08,662 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:08,662 INFO L481 AbstractCegarLoop]: Abstraction has 45 states and 108 transitions. [2020-11-11 21:35:08,662 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:08,663 INFO L276 IsEmpty]: Start isEmpty. Operand 45 states and 108 transitions. [2020-11-11 21:35:08,663 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2020-11-11 21:35:08,664 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:08,664 INFO L494 BasicCegarLoop]: trace histogram [4, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:08,864 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-11-11 21:35:08,864 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:08,865 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:08,865 INFO L82 PathProgramCache]: Analyzing trace with hash 136944314, now seen corresponding path program 21 times [2020-11-11 21:35:08,865 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:08,866 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1198121232] [2020-11-11 21:35:08,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:08,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:08,951 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:08,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1198121232] [2020-11-11 21:35:08,951 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [420170195] [2020-11-11 21:35:08,951 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:09,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-11-11 21:35:09,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:09,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 118 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:35:09,014 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:09,037 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:09,049 INFO L134 CoverageAnalysis]: Checked inductivity of 12 backedges. 0 proven. 12 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:09,050 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:09,050 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [10, 10] total 11 [2020-11-11 21:35:09,050 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2094087079] [2020-11-11 21:35:09,050 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:35:09,050 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:09,051 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:35:09,051 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:35:09,052 INFO L87 Difference]: Start difference. First operand 45 states and 108 transitions. Second operand has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:09,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:09,406 INFO L93 Difference]: Finished difference Result 76 states and 183 transitions. [2020-11-11 21:35:09,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 21:35:09,406 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2020-11-11 21:35:09,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:09,407 INFO L225 Difference]: With dead ends: 76 [2020-11-11 21:35:09,407 INFO L226 Difference]: Without dead ends: 71 [2020-11-11 21:35:09,408 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 13 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 187 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=298, Invalid=572, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:35:09,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 71 states. [2020-11-11 21:35:09,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 71 to 58. [2020-11-11 21:35:09,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.543859649122807) internal successors, (145), 57 states have internal predecessors, (145), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:09,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 145 transitions. [2020-11-11 21:35:09,411 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 145 transitions. Word has length 16 [2020-11-11 21:35:09,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:09,411 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 145 transitions. [2020-11-11 21:35:09,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.5) internal successors, (18), 12 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:09,412 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 145 transitions. [2020-11-11 21:35:09,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:35:09,412 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:09,412 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:09,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-11-11 21:35:09,622 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:09,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:09,623 INFO L82 PathProgramCache]: Analyzing trace with hash -34023645, now seen corresponding path program 22 times [2020-11-11 21:35:09,623 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:09,623 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812798684] [2020-11-11 21:35:09,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:09,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:09,709 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812798684] [2020-11-11 21:35:09,710 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1756489771] [2020-11-11 21:35:09,710 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:09,766 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:09,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:09,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:35:09,772 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:09,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:09,823 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:09,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:09,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 21:35:09,824 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [742058029] [2020-11-11 21:35:09,824 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:35:09,824 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:09,825 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:35:09,825 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:35:09,825 INFO L87 Difference]: Start difference. First operand 58 states and 145 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:10,259 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:10,259 INFO L93 Difference]: Finished difference Result 66 states and 165 transitions. [2020-11-11 21:35:10,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 21:35:10,260 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2020-11-11 21:35:10,260 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:10,260 INFO L225 Difference]: With dead ends: 66 [2020-11-11 21:35:10,260 INFO L226 Difference]: Without dead ends: 61 [2020-11-11 21:35:10,261 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 197 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=311, Invalid=619, Unknown=0, NotChecked=0, Total=930 [2020-11-11 21:35:10,261 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 61 states. [2020-11-11 21:35:10,263 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 61 to 46. [2020-11-11 21:35:10,263 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 46 states, 45 states have (on average 2.488888888888889) internal successors, (112), 45 states have internal predecessors, (112), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:10,263 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 46 states to 46 states and 112 transitions. [2020-11-11 21:35:10,264 INFO L78 Accepts]: Start accepts. Automaton has 46 states and 112 transitions. Word has length 17 [2020-11-11 21:35:10,264 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:10,264 INFO L481 AbstractCegarLoop]: Abstraction has 46 states and 112 transitions. [2020-11-11 21:35:10,264 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:10,264 INFO L276 IsEmpty]: Start isEmpty. Operand 46 states and 112 transitions. [2020-11-11 21:35:10,264 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:35:10,264 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:10,265 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:10,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-11-11 21:35:10,475 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:10,475 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:10,476 INFO L82 PathProgramCache]: Analyzing trace with hash 550224070, now seen corresponding path program 23 times [2020-11-11 21:35:10,476 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:10,477 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [687955382] [2020-11-11 21:35:10,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:10,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:10,586 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:10,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [687955382] [2020-11-11 21:35:10,587 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [452103464] [2020-11-11 21:35:10,587 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:10,642 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 5 check-sat command(s) [2020-11-11 21:35:10,642 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:10,643 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:35:10,644 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:10,661 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:10,662 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:10,662 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 11 [2020-11-11 21:35:10,662 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1673080623] [2020-11-11 21:35:10,662 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:35:10,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:10,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:35:10,663 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-11-11 21:35:10,663 INFO L87 Difference]: Start difference. First operand 46 states and 112 transitions. Second operand has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:10,840 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:10,840 INFO L93 Difference]: Finished difference Result 72 states and 167 transitions. [2020-11-11 21:35:10,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-11-11 21:35:10,843 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2020-11-11 21:35:10,843 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:10,844 INFO L225 Difference]: With dead ends: 72 [2020-11-11 21:35:10,844 INFO L226 Difference]: Without dead ends: 66 [2020-11-11 21:35:10,845 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=153, Invalid=309, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:35:10,845 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2020-11-11 21:35:10,847 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 54. [2020-11-11 21:35:10,847 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.4716981132075473) internal successors, (131), 53 states have internal predecessors, (131), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:10,847 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 131 transitions. [2020-11-11 21:35:10,847 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 131 transitions. Word has length 17 [2020-11-11 21:35:10,848 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:10,848 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 131 transitions. [2020-11-11 21:35:10,848 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 12 states have (on average 1.4166666666666667) internal successors, (17), 12 states have internal predecessors, (17), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:10,848 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 131 transitions. [2020-11-11 21:35:10,848 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2020-11-11 21:35:10,848 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:10,848 INFO L494 BasicCegarLoop]: trace histogram [5, 4, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:11,056 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-11-11 21:35:11,057 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:11,057 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:11,058 INFO L82 PathProgramCache]: Analyzing trace with hash -49666300, now seen corresponding path program 24 times [2020-11-11 21:35:11,058 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:11,058 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325090927] [2020-11-11 21:35:11,059 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:11,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:11,142 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325090927] [2020-11-11 21:35:11,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [850674440] [2020-11-11 21:35:11,143 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:11,203 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 5 check-sat command(s) [2020-11-11 21:35:11,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:11,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 123 conjuncts, 13 conjunts are in the unsatisfiable core [2020-11-11 21:35:11,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:11,235 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:11,246 INFO L134 CoverageAnalysis]: Checked inductivity of 16 backedges. 0 proven. 16 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:11,246 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:11,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [11, 11] total 12 [2020-11-11 21:35:11,246 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [490910940] [2020-11-11 21:35:11,247 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:35:11,247 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:11,247 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:35:11,247 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:35:11,248 INFO L87 Difference]: Start difference. First operand 54 states and 131 transitions. Second operand has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:11,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:11,694 INFO L93 Difference]: Finished difference Result 95 states and 225 transitions. [2020-11-11 21:35:11,694 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:35:11,695 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2020-11-11 21:35:11,695 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:11,696 INFO L225 Difference]: With dead ends: 95 [2020-11-11 21:35:11,696 INFO L226 Difference]: Without dead ends: 86 [2020-11-11 21:35:11,697 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 14 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=337, Invalid=719, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:35:11,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 86 states. [2020-11-11 21:35:11,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 86 to 61. [2020-11-11 21:35:11,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.55) internal successors, (153), 60 states have internal predecessors, (153), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:11,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 153 transitions. [2020-11-11 21:35:11,701 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 153 transitions. Word has length 17 [2020-11-11 21:35:11,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:11,701 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 153 transitions. [2020-11-11 21:35:11,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.4615384615384615) internal successors, (19), 13 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:11,701 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 153 transitions. [2020-11-11 21:35:11,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-11 21:35:11,702 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:11,702 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:11,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-11-11 21:35:11,912 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:11,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:11,913 INFO L82 PathProgramCache]: Analyzing trace with hash -454815363, now seen corresponding path program 25 times [2020-11-11 21:35:11,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:11,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1715303349] [2020-11-11 21:35:11,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:11,924 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:12,031 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:12,031 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1715303349] [2020-11-11 21:35:12,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1909090090] [2020-11-11 21:35:12,032 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:12,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:12,108 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 21:35:12,109 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:12,141 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:12,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:12,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 12 [2020-11-11 21:35:12,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159785773] [2020-11-11 21:35:12,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-11-11 21:35:12,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:12,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-11-11 21:35:12,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2020-11-11 21:35:12,143 INFO L87 Difference]: Start difference. First operand 61 states and 153 transitions. Second operand has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:12,348 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:12,348 INFO L93 Difference]: Finished difference Result 94 states and 219 transitions. [2020-11-11 21:35:12,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:35:12,348 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2020-11-11 21:35:12,349 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:12,350 INFO L225 Difference]: With dead ends: 94 [2020-11-11 21:35:12,350 INFO L226 Difference]: Without dead ends: 88 [2020-11-11 21:35:12,350 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:35:12,351 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2020-11-11 21:35:12,352 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 63. [2020-11-11 21:35:12,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 63 states, 62 states have (on average 2.532258064516129) internal successors, (157), 62 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:12,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 63 states to 63 states and 157 transitions. [2020-11-11 21:35:12,353 INFO L78 Accepts]: Start accepts. Automaton has 63 states and 157 transitions. Word has length 18 [2020-11-11 21:35:12,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:12,354 INFO L481 AbstractCegarLoop]: Abstraction has 63 states and 157 transitions. [2020-11-11 21:35:12,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 14 states, 13 states have (on average 1.3846153846153846) internal successors, (18), 13 states have internal predecessors, (18), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:12,354 INFO L276 IsEmpty]: Start isEmpty. Operand 63 states and 157 transitions. [2020-11-11 21:35:12,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-11 21:35:12,354 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:12,354 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:12,562 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:12,563 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:12,563 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:12,563 INFO L82 PathProgramCache]: Analyzing trace with hash -1054705733, now seen corresponding path program 26 times [2020-11-11 21:35:12,564 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:12,564 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [922037033] [2020-11-11 21:35:12,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:12,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:12,663 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:12,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [922037033] [2020-11-11 21:35:12,663 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674628955] [2020-11-11 21:35:12,664 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:12,712 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:12,712 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:12,713 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 21:35:12,714 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:12,755 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:12,755 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:12,755 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 21:35:12,755 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [831524282] [2020-11-11 21:35:12,756 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:35:12,756 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:12,756 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:35:12,756 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=160, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:35:12,757 INFO L87 Difference]: Start difference. First operand 63 states and 157 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:13,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:13,222 INFO L93 Difference]: Finished difference Result 83 states and 201 transitions. [2020-11-11 21:35:13,222 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-11-11 21:35:13,222 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2020-11-11 21:35:13,222 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:13,223 INFO L225 Difference]: With dead ends: 83 [2020-11-11 21:35:13,223 INFO L226 Difference]: Without dead ends: 74 [2020-11-11 21:35:13,224 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 239 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=326, Invalid=796, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:35:13,225 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2020-11-11 21:35:13,227 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 49. [2020-11-11 21:35:13,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 49 states, 48 states have (on average 2.4583333333333335) internal successors, (118), 48 states have internal predecessors, (118), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:13,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 49 states to 49 states and 118 transitions. [2020-11-11 21:35:13,228 INFO L78 Accepts]: Start accepts. Automaton has 49 states and 118 transitions. Word has length 18 [2020-11-11 21:35:13,228 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:13,228 INFO L481 AbstractCegarLoop]: Abstraction has 49 states and 118 transitions. [2020-11-11 21:35:13,228 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:13,228 INFO L276 IsEmpty]: Start isEmpty. Operand 49 states and 118 transitions. [2020-11-11 21:35:13,228 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2020-11-11 21:35:13,229 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:13,229 INFO L494 BasicCegarLoop]: trace histogram [5, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:13,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-11-11 21:35:13,438 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:13,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:13,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1539632843, now seen corresponding path program 27 times [2020-11-11 21:35:13,439 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:13,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [174931423] [2020-11-11 21:35:13,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:13,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:13,530 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:13,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [174931423] [2020-11-11 21:35:13,531 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1198114199] [2020-11-11 21:35:13,531 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:13,583 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 5 check-sat command(s) [2020-11-11 21:35:13,583 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:13,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 128 conjuncts, 14 conjunts are in the unsatisfiable core [2020-11-11 21:35:13,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:13,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:13,616 INFO L134 CoverageAnalysis]: Checked inductivity of 20 backedges. 0 proven. 20 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:13,617 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:13,617 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [12, 12] total 13 [2020-11-11 21:35:13,617 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138990769] [2020-11-11 21:35:13,617 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:35:13,617 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:13,618 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:35:13,618 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:35:13,620 INFO L87 Difference]: Start difference. First operand 49 states and 118 transitions. Second operand has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:14,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:14,126 INFO L93 Difference]: Finished difference Result 84 states and 203 transitions. [2020-11-11 21:35:14,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 21:35:14,127 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2020-11-11 21:35:14,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:14,128 INFO L225 Difference]: With dead ends: 84 [2020-11-11 21:35:14,128 INFO L226 Difference]: Without dead ends: 79 [2020-11-11 21:35:14,130 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 50 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=425, Invalid=835, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 21:35:14,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-11 21:35:14,134 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 64. [2020-11-11 21:35:14,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.5555555555555554) internal successors, (161), 63 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:14,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 161 transitions. [2020-11-11 21:35:14,134 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 161 transitions. Word has length 18 [2020-11-11 21:35:14,135 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:14,135 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 161 transitions. [2020-11-11 21:35:14,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.4285714285714286) internal successors, (20), 14 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:14,135 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 161 transitions. [2020-11-11 21:35:14,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-11 21:35:14,135 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:14,135 INFO L494 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:14,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-11-11 21:35:14,336 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:14,337 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:14,337 INFO L82 PathProgramCache]: Analyzing trace with hash 1663883102, now seen corresponding path program 28 times [2020-11-11 21:35:14,338 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:14,338 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [904710182] [2020-11-11 21:35:14,338 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:14,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:14,443 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:14,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [904710182] [2020-11-11 21:35:14,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [247144910] [2020-11-11 21:35:14,443 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:14,497 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:14,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:14,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 21:35:14,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:14,525 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:14,544 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:14,544 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:14,544 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 21:35:14,545 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122841170] [2020-11-11 21:35:14,545 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 21:35:14,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:14,546 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 21:35:14,546 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=182, Unknown=0, NotChecked=0, Total=240 [2020-11-11 21:35:14,546 INFO L87 Difference]: Start difference. First operand 64 states and 161 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:15,093 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:15,093 INFO L93 Difference]: Finished difference Result 72 states and 181 transitions. [2020-11-11 21:35:15,094 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 21:35:15,094 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2020-11-11 21:35:15,094 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:15,095 INFO L225 Difference]: With dead ends: 72 [2020-11-11 21:35:15,095 INFO L226 Difference]: Without dead ends: 67 [2020-11-11 21:35:15,096 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=439, Invalid=893, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:35:15,096 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 67 states. [2020-11-11 21:35:15,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 67 to 50. [2020-11-11 21:35:15,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.489795918367347) internal successors, (122), 49 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:15,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 122 transitions. [2020-11-11 21:35:15,099 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 122 transitions. Word has length 19 [2020-11-11 21:35:15,099 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:15,099 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 122 transitions. [2020-11-11 21:35:15,099 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:15,099 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 122 transitions. [2020-11-11 21:35:15,100 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-11 21:35:15,100 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:15,101 INFO L494 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:15,308 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:15,308 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:15,309 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:15,309 INFO L82 PathProgramCache]: Analyzing trace with hash 484358401, now seen corresponding path program 29 times [2020-11-11 21:35:15,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:15,310 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2089830728] [2020-11-11 21:35:15,310 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:15,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:15,450 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2089830728] [2020-11-11 21:35:15,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946329666] [2020-11-11 21:35:15,451 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:15,501 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 6 check-sat command(s) [2020-11-11 21:35:15,501 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:15,502 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 21:35:15,503 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:15,521 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:15,521 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:15,521 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 13 [2020-11-11 21:35:15,521 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [875459170] [2020-11-11 21:35:15,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-11-11 21:35:15,522 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:15,522 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-11-11 21:35:15,522 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:35:15,522 INFO L87 Difference]: Start difference. First operand 50 states and 122 transitions. Second operand has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:15,762 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:15,762 INFO L93 Difference]: Finished difference Result 78 states and 181 transitions. [2020-11-11 21:35:15,762 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-11-11 21:35:15,763 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2020-11-11 21:35:15,763 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:15,763 INFO L225 Difference]: With dead ends: 78 [2020-11-11 21:35:15,764 INFO L226 Difference]: Without dead ends: 72 [2020-11-11 21:35:15,764 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=213, Invalid=437, Unknown=0, NotChecked=0, Total=650 [2020-11-11 21:35:15,765 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2020-11-11 21:35:15,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 58. [2020-11-11 21:35:15,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.473684210526316) internal successors, (141), 57 states have internal predecessors, (141), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:15,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 141 transitions. [2020-11-11 21:35:15,767 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 141 transitions. Word has length 19 [2020-11-11 21:35:15,768 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:15,768 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 141 transitions. [2020-11-11 21:35:15,768 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 15 states, 14 states have (on average 1.3571428571428572) internal successors, (19), 14 states have internal predecessors, (19), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:15,768 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 141 transitions. [2020-11-11 21:35:15,768 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 20 [2020-11-11 21:35:15,768 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:15,768 INFO L494 BasicCegarLoop]: trace histogram [6, 5, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:15,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:15,977 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:15,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:15,977 INFO L82 PathProgramCache]: Analyzing trace with hash -483950615, now seen corresponding path program 30 times [2020-11-11 21:35:15,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:15,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605640634] [2020-11-11 21:35:15,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:15,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:16,102 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:16,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605640634] [2020-11-11 21:35:16,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [649570404] [2020-11-11 21:35:16,103 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:35:16,164 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 6 check-sat command(s) [2020-11-11 21:35:16,164 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:16,165 INFO L263 TraceCheckSpWp]: Trace formula consists of 133 conjuncts, 15 conjunts are in the unsatisfiable core [2020-11-11 21:35:16,166 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:16,189 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:16,201 INFO L134 CoverageAnalysis]: Checked inductivity of 25 backedges. 0 proven. 25 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:16,201 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:16,202 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [13, 13] total 14 [2020-11-11 21:35:16,202 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1940706367] [2020-11-11 21:35:16,202 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 21:35:16,202 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:16,202 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 21:35:16,203 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=183, Unknown=0, NotChecked=0, Total=240 [2020-11-11 21:35:16,203 INFO L87 Difference]: Start difference. First operand 58 states and 141 transitions. Second operand has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:16,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:16,769 INFO L93 Difference]: Finished difference Result 105 states and 249 transitions. [2020-11-11 21:35:16,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-11-11 21:35:16,769 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 19 [2020-11-11 21:35:16,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:16,770 INFO L225 Difference]: With dead ends: 105 [2020-11-11 21:35:16,770 INFO L226 Difference]: Without dead ends: 96 [2020-11-11 21:35:16,772 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 16 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 359 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=469, Invalid=1013, Unknown=0, NotChecked=0, Total=1482 [2020-11-11 21:35:16,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-11 21:35:16,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 67. [2020-11-11 21:35:16,775 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 67 states, 66 states have (on average 2.5606060606060606) internal successors, (169), 66 states have internal predecessors, (169), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:16,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 67 states to 67 states and 169 transitions. [2020-11-11 21:35:16,775 INFO L78 Accepts]: Start accepts. Automaton has 67 states and 169 transitions. Word has length 19 [2020-11-11 21:35:16,776 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:16,776 INFO L481 AbstractCegarLoop]: Abstraction has 67 states and 169 transitions. [2020-11-11 21:35:16,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.4) internal successors, (21), 15 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:16,776 INFO L276 IsEmpty]: Start isEmpty. Operand 67 states and 169 transitions. [2020-11-11 21:35:16,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-11 21:35:16,777 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:16,777 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:16,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-11-11 21:35:16,987 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:16,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:16,988 INFO L82 PathProgramCache]: Analyzing trace with hash 1009104888, now seen corresponding path program 31 times [2020-11-11 21:35:16,988 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:16,988 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [745513510] [2020-11-11 21:35:16,988 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:16,998 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:17,143 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:17,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [745513510] [2020-11-11 21:35:17,143 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1222525724] [2020-11-11 21:35:17,144 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:17,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:17,193 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 21:35:17,194 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:17,210 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:17,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:17,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 14 [2020-11-11 21:35:17,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433833664] [2020-11-11 21:35:17,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-11-11 21:35:17,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:17,212 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-11-11 21:35:17,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2020-11-11 21:35:17,212 INFO L87 Difference]: Start difference. First operand 67 states and 169 transitions. Second operand has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:17,480 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:17,480 INFO L93 Difference]: Finished difference Result 104 states and 243 transitions. [2020-11-11 21:35:17,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:35:17,481 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2020-11-11 21:35:17,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:17,481 INFO L225 Difference]: With dead ends: 104 [2020-11-11 21:35:17,482 INFO L226 Difference]: Without dead ends: 98 [2020-11-11 21:35:17,483 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=247, Invalid=565, Unknown=0, NotChecked=0, Total=812 [2020-11-11 21:35:17,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-11-11 21:35:17,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 69. [2020-11-11 21:35:17,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.5441176470588234) internal successors, (173), 68 states have internal predecessors, (173), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:17,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 173 transitions. [2020-11-11 21:35:17,487 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 173 transitions. Word has length 20 [2020-11-11 21:35:17,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:17,487 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 173 transitions. [2020-11-11 21:35:17,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 16 states, 15 states have (on average 1.3333333333333333) internal successors, (20), 15 states have internal predecessors, (20), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:17,487 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 173 transitions. [2020-11-11 21:35:17,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-11 21:35:17,487 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:17,488 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:17,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:17,688 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:17,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:17,689 INFO L82 PathProgramCache]: Analyzing trace with hash 40795872, now seen corresponding path program 32 times [2020-11-11 21:35:17,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:17,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [887987922] [2020-11-11 21:35:17,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:17,702 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:17,807 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:17,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [887987922] [2020-11-11 21:35:17,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1416154390] [2020-11-11 21:35:17,808 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:17,881 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:17,882 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:17,882 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 21:35:17,883 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:17,915 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:17,926 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:17,926 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:17,927 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 21:35:17,927 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1704565808] [2020-11-11 21:35:17,927 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:35:17,927 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:17,928 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:35:17,928 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:35:17,928 INFO L87 Difference]: Start difference. First operand 69 states and 173 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:18,562 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:18,563 INFO L93 Difference]: Finished difference Result 93 states and 225 transitions. [2020-11-11 21:35:18,563 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-11-11 21:35:18,563 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2020-11-11 21:35:18,563 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:18,564 INFO L225 Difference]: With dead ends: 93 [2020-11-11 21:35:18,564 INFO L226 Difference]: Without dead ends: 84 [2020-11-11 21:35:18,565 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 407 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=545, Invalid=1177, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:35:18,565 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-11 21:35:18,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 53. [2020-11-11 21:35:18,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 53 states, 52 states have (on average 2.4615384615384617) internal successors, (128), 52 states have internal predecessors, (128), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:18,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 53 states to 53 states and 128 transitions. [2020-11-11 21:35:18,568 INFO L78 Accepts]: Start accepts. Automaton has 53 states and 128 transitions. Word has length 20 [2020-11-11 21:35:18,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:18,568 INFO L481 AbstractCegarLoop]: Abstraction has 53 states and 128 transitions. [2020-11-11 21:35:18,568 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:18,568 INFO L276 IsEmpty]: Start isEmpty. Operand 53 states and 128 transitions. [2020-11-11 21:35:18,568 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 21 [2020-11-11 21:35:18,569 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:18,569 INFO L494 BasicCegarLoop]: trace histogram [6, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:18,769 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-11-11 21:35:18,770 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:18,770 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:18,770 INFO L82 PathProgramCache]: Analyzing trace with hash -2117544720, now seen corresponding path program 33 times [2020-11-11 21:35:18,771 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:18,771 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [105240336] [2020-11-11 21:35:18,771 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:18,781 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:18,888 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [105240336] [2020-11-11 21:35:18,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [3163265] [2020-11-11 21:35:18,889 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:18,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 6 check-sat command(s) [2020-11-11 21:35:18,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:18,943 INFO L263 TraceCheckSpWp]: Trace formula consists of 138 conjuncts, 16 conjunts are in the unsatisfiable core [2020-11-11 21:35:18,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:18,971 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:18,984 INFO L134 CoverageAnalysis]: Checked inductivity of 30 backedges. 0 proven. 30 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:18,985 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:18,985 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [14, 14] total 15 [2020-11-11 21:35:18,985 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [144605931] [2020-11-11 21:35:18,986 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:35:18,986 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:18,986 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:35:18,987 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:35:18,987 INFO L87 Difference]: Start difference. First operand 53 states and 128 transitions. Second operand has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:19,614 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:19,614 INFO L93 Difference]: Finished difference Result 92 states and 223 transitions. [2020-11-11 21:35:19,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 21:35:19,615 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 20 [2020-11-11 21:35:19,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:19,616 INFO L225 Difference]: With dead ends: 92 [2020-11-11 21:35:19,616 INFO L226 Difference]: Without dead ends: 87 [2020-11-11 21:35:19,617 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 17 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 441 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=574, Invalid=1148, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:35:19,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-11-11 21:35:19,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 70. [2020-11-11 21:35:19,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.5652173913043477) internal successors, (177), 69 states have internal predecessors, (177), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:19,619 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 177 transitions. [2020-11-11 21:35:19,620 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 177 transitions. Word has length 20 [2020-11-11 21:35:19,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:19,620 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 177 transitions. [2020-11-11 21:35:19,620 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.375) internal successors, (22), 16 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:19,620 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 177 transitions. [2020-11-11 21:35:19,620 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-11 21:35:19,620 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:19,621 INFO L494 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:19,821 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:19,821 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:19,822 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:19,822 INFO L82 PathProgramCache]: Analyzing trace with hash 1264694489, now seen corresponding path program 34 times [2020-11-11 21:35:19,822 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:19,823 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1250193073] [2020-11-11 21:35:19,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:19,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:19,946 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:19,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1250193073] [2020-11-11 21:35:19,946 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [183078443] [2020-11-11 21:35:19,946 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:20,003 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:20,003 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:20,004 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 21:35:20,004 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:20,029 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:20,043 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:20,043 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:20,043 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 21:35:20,043 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1714288364] [2020-11-11 21:35:20,044 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:35:20,044 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:20,044 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:35:20,045 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=233, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:35:20,045 INFO L87 Difference]: Start difference. First operand 70 states and 177 transitions. Second operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:20,696 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:20,696 INFO L93 Difference]: Finished difference Result 78 states and 197 transitions. [2020-11-11 21:35:20,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-11-11 21:35:20,697 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2020-11-11 21:35:20,697 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:20,698 INFO L225 Difference]: With dead ends: 78 [2020-11-11 21:35:20,698 INFO L226 Difference]: Without dead ends: 73 [2020-11-11 21:35:20,699 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=589, Invalid=1217, Unknown=0, NotChecked=0, Total=1806 [2020-11-11 21:35:20,699 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 73 states. [2020-11-11 21:35:20,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 73 to 54. [2020-11-11 21:35:20,701 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.490566037735849) internal successors, (132), 53 states have internal predecessors, (132), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:20,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 132 transitions. [2020-11-11 21:35:20,701 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 132 transitions. Word has length 21 [2020-11-11 21:35:20,701 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:20,701 INFO L481 AbstractCegarLoop]: Abstraction has 54 states and 132 transitions. [2020-11-11 21:35:20,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:20,702 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 132 transitions. [2020-11-11 21:35:20,702 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-11 21:35:20,702 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:20,702 INFO L494 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:20,911 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-11-11 21:35:20,912 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:20,913 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:20,913 INFO L82 PathProgramCache]: Analyzing trace with hash 1611959932, now seen corresponding path program 35 times [2020-11-11 21:35:20,913 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:20,913 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [455723493] [2020-11-11 21:35:20,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:20,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:21,068 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:21,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [455723493] [2020-11-11 21:35:21,069 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [161542838] [2020-11-11 21:35:21,069 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:21,119 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 7 check-sat command(s) [2020-11-11 21:35:21,119 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:21,120 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 17 conjunts are in the unsatisfiable core [2020-11-11 21:35:21,120 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:21,141 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:21,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:21,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 15 [2020-11-11 21:35:21,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189798197] [2020-11-11 21:35:21,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-11-11 21:35:21,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:21,143 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-11-11 21:35:21,143 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-11-11 21:35:21,143 INFO L87 Difference]: Start difference. First operand 54 states and 132 transitions. Second operand has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:21,458 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:21,458 INFO L93 Difference]: Finished difference Result 84 states and 195 transitions. [2020-11-11 21:35:21,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-11-11 21:35:21,459 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2020-11-11 21:35:21,459 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:21,460 INFO L225 Difference]: With dead ends: 84 [2020-11-11 21:35:21,460 INFO L226 Difference]: Without dead ends: 78 [2020-11-11 21:35:21,461 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=283, Invalid=587, Unknown=0, NotChecked=0, Total=870 [2020-11-11 21:35:21,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2020-11-11 21:35:21,462 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 62. [2020-11-11 21:35:21,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4754098360655736) internal successors, (151), 61 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:21,463 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 151 transitions. [2020-11-11 21:35:21,463 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 151 transitions. Word has length 21 [2020-11-11 21:35:21,463 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:21,463 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 151 transitions. [2020-11-11 21:35:21,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 17 states, 16 states have (on average 1.3125) internal successors, (21), 16 states have internal predecessors, (21), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:21,464 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 151 transitions. [2020-11-11 21:35:21,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 22 [2020-11-11 21:35:21,464 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:21,464 INFO L494 BasicCegarLoop]: trace histogram [7, 6, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:21,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-11-11 21:35:21,673 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:21,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:21,673 INFO L82 PathProgramCache]: Analyzing trace with hash -1219349618, now seen corresponding path program 36 times [2020-11-11 21:35:21,674 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:21,674 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538863588] [2020-11-11 21:35:21,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:21,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:21,796 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:21,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538863588] [2020-11-11 21:35:21,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890786912] [2020-11-11 21:35:21,797 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:21,859 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 7 check-sat command(s) [2020-11-11 21:35:21,859 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:21,860 INFO L263 TraceCheckSpWp]: Trace formula consists of 143 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 21:35:21,861 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:21,902 INFO L134 CoverageAnalysis]: Checked inductivity of 36 backedges. 0 proven. 36 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:21,902 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:21,902 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [15, 15] total 16 [2020-11-11 21:35:21,902 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1026838507] [2020-11-11 21:35:21,903 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:35:21,903 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:21,903 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:35:21,903 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=234, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:35:21,904 INFO L87 Difference]: Start difference. First operand 62 states and 151 transitions. Second operand has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:22,580 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:22,581 INFO L93 Difference]: Finished difference Result 115 states and 273 transitions. [2020-11-11 21:35:22,581 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-11-11 21:35:22,581 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 21 [2020-11-11 21:35:22,581 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:22,582 INFO L225 Difference]: With dead ends: 115 [2020-11-11 21:35:22,582 INFO L226 Difference]: Without dead ends: 106 [2020-11-11 21:35:22,583 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 62 GetRequests, 18 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 480 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=575, Invalid=1405, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:35:22,584 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2020-11-11 21:35:22,585 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 73. [2020-11-11 21:35:22,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 73 states, 72 states have (on average 2.5694444444444446) internal successors, (185), 72 states have internal predecessors, (185), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:22,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 73 states to 73 states and 185 transitions. [2020-11-11 21:35:22,586 INFO L78 Accepts]: Start accepts. Automaton has 73 states and 185 transitions. Word has length 21 [2020-11-11 21:35:22,586 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:22,587 INFO L481 AbstractCegarLoop]: Abstraction has 73 states and 185 transitions. [2020-11-11 21:35:22,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.3529411764705883) internal successors, (23), 17 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:22,587 INFO L276 IsEmpty]: Start isEmpty. Operand 73 states and 185 transitions. [2020-11-11 21:35:22,587 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-11 21:35:22,587 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:22,587 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:22,788 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-11-11 21:35:22,788 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:22,789 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:22,789 INFO L82 PathProgramCache]: Analyzing trace with hash -912806989, now seen corresponding path program 37 times [2020-11-11 21:35:22,789 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:22,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461631986] [2020-11-11 21:35:22,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:22,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:22,982 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:22,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461631986] [2020-11-11 21:35:22,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [715621825] [2020-11-11 21:35:22,983 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:23,035 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:23,036 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 21:35:23,037 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:23,056 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:23,056 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:23,056 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 16 [2020-11-11 21:35:23,057 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842949177] [2020-11-11 21:35:23,057 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-11-11 21:35:23,057 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:23,057 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-11-11 21:35:23,058 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=230, Unknown=0, NotChecked=0, Total=306 [2020-11-11 21:35:23,058 INFO L87 Difference]: Start difference. First operand 73 states and 185 transitions. Second operand has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:23,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:23,405 INFO L93 Difference]: Finished difference Result 114 states and 267 transitions. [2020-11-11 21:35:23,405 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 21:35:23,406 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2020-11-11 21:35:23,406 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:23,407 INFO L225 Difference]: With dead ends: 114 [2020-11-11 21:35:23,407 INFO L226 Difference]: Without dead ends: 108 [2020-11-11 21:35:23,407 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 52 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 171 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=321, Invalid=735, Unknown=0, NotChecked=0, Total=1056 [2020-11-11 21:35:23,408 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-11 21:35:23,410 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 75. [2020-11-11 21:35:23,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 75 states, 74 states have (on average 2.554054054054054) internal successors, (189), 74 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:23,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 75 states to 75 states and 189 transitions. [2020-11-11 21:35:23,411 INFO L78 Accepts]: Start accepts. Automaton has 75 states and 189 transitions. Word has length 22 [2020-11-11 21:35:23,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:23,411 INFO L481 AbstractCegarLoop]: Abstraction has 75 states and 189 transitions. [2020-11-11 21:35:23,412 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 18 states, 17 states have (on average 1.2941176470588236) internal successors, (22), 17 states have internal predecessors, (22), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:23,412 INFO L276 IsEmpty]: Start isEmpty. Operand 75 states and 189 transitions. [2020-11-11 21:35:23,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-11 21:35:23,412 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:23,412 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:23,622 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-11-11 21:35:23,623 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:23,623 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:23,623 INFO L82 PathProgramCache]: Analyzing trace with hash 550850757, now seen corresponding path program 38 times [2020-11-11 21:35:23,624 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:23,624 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018650294] [2020-11-11 21:35:23,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:23,637 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:23,785 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:23,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018650294] [2020-11-11 21:35:23,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1990387080] [2020-11-11 21:35:23,786 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:23,840 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:23,841 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:23,842 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 21:35:23,843 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:23,874 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:23,890 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:23,890 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:23,890 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 21:35:23,891 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1433986674] [2020-11-11 21:35:23,891 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:35:23,891 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:23,891 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:35:23,891 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=262, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:35:23,892 INFO L87 Difference]: Start difference. First operand 75 states and 189 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:24,690 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:24,690 INFO L93 Difference]: Finished difference Result 101 states and 245 transitions. [2020-11-11 21:35:24,690 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-11-11 21:35:24,691 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2020-11-11 21:35:24,691 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:24,692 INFO L225 Difference]: With dead ends: 101 [2020-11-11 21:35:24,692 INFO L226 Difference]: Without dead ends: 92 [2020-11-11 21:35:24,693 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 553 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=710, Invalid=1546, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 21:35:24,693 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 92 states. [2020-11-11 21:35:24,696 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 92 to 57. [2020-11-11 21:35:24,696 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 57 states, 56 states have (on average 2.4642857142857144) internal successors, (138), 56 states have internal predecessors, (138), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:24,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 57 states to 57 states and 138 transitions. [2020-11-11 21:35:24,697 INFO L78 Accepts]: Start accepts. Automaton has 57 states and 138 transitions. Word has length 22 [2020-11-11 21:35:24,697 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:24,697 INFO L481 AbstractCegarLoop]: Abstraction has 57 states and 138 transitions. [2020-11-11 21:35:24,697 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:24,697 INFO L276 IsEmpty]: Start isEmpty. Operand 57 states and 138 transitions. [2020-11-11 21:35:24,697 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 23 [2020-11-11 21:35:24,697 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:24,698 INFO L494 BasicCegarLoop]: trace histogram [7, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:24,908 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-11-11 21:35:24,909 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:24,909 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:24,909 INFO L82 PathProgramCache]: Analyzing trace with hash 854889963, now seen corresponding path program 39 times [2020-11-11 21:35:24,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:24,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [679573060] [2020-11-11 21:35:24,910 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:24,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:25,055 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:25,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [679573060] [2020-11-11 21:35:25,055 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [54896349] [2020-11-11 21:35:25,055 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:25,122 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 7 check-sat command(s) [2020-11-11 21:35:25,122 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:25,123 INFO L263 TraceCheckSpWp]: Trace formula consists of 148 conjuncts, 18 conjunts are in the unsatisfiable core [2020-11-11 21:35:25,124 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:25,149 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:25,166 INFO L134 CoverageAnalysis]: Checked inductivity of 42 backedges. 0 proven. 42 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:25,166 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:25,166 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [16, 16] total 17 [2020-11-11 21:35:25,167 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064055450] [2020-11-11 21:35:25,167 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:35:25,167 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:25,168 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:35:25,168 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=261, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:35:25,168 INFO L87 Difference]: Start difference. First operand 57 states and 138 transitions. Second operand has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:25,914 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:25,914 INFO L93 Difference]: Finished difference Result 100 states and 243 transitions. [2020-11-11 21:35:25,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 21:35:25,915 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 22 [2020-11-11 21:35:25,915 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:25,916 INFO L225 Difference]: With dead ends: 100 [2020-11-11 21:35:25,916 INFO L226 Difference]: Without dead ends: 95 [2020-11-11 21:35:25,917 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 19 SyntacticMatches, 1 SemanticMatches, 46 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 601 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=745, Invalid=1511, Unknown=0, NotChecked=0, Total=2256 [2020-11-11 21:35:25,918 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 95 states. [2020-11-11 21:35:25,920 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 95 to 76. [2020-11-11 21:35:25,920 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.5733333333333333) internal successors, (193), 75 states have internal predecessors, (193), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:25,920 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 193 transitions. [2020-11-11 21:35:25,920 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 193 transitions. Word has length 22 [2020-11-11 21:35:25,921 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:25,921 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 193 transitions. [2020-11-11 21:35:25,921 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.3333333333333333) internal successors, (24), 18 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:25,921 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 193 transitions. [2020-11-11 21:35:25,921 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-11 21:35:25,921 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:25,921 INFO L494 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:26,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-11-11 21:35:26,131 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:26,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:26,131 INFO L82 PathProgramCache]: Analyzing trace with hash -103473260, now seen corresponding path program 40 times [2020-11-11 21:35:26,132 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:26,132 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143561583] [2020-11-11 21:35:26,132 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:26,140 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:26,287 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:26,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143561583] [2020-11-11 21:35:26,287 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [367778296] [2020-11-11 21:35:26,287 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:26,345 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:26,345 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:26,346 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 21:35:26,347 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:26,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:26,401 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:26,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:26,402 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 21:35:26,402 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1024629169] [2020-11-11 21:35:26,402 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 21:35:26,402 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:26,403 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 21:35:26,403 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=90, Invalid=290, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:35:26,403 INFO L87 Difference]: Start difference. First operand 76 states and 193 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:27,205 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:27,205 INFO L93 Difference]: Finished difference Result 84 states and 213 transitions. [2020-11-11 21:35:27,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-11-11 21:35:27,206 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2020-11-11 21:35:27,206 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:27,207 INFO L225 Difference]: With dead ends: 84 [2020-11-11 21:35:27,207 INFO L226 Difference]: Without dead ends: 79 [2020-11-11 21:35:27,208 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 68 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 47 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 578 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=761, Invalid=1591, Unknown=0, NotChecked=0, Total=2352 [2020-11-11 21:35:27,209 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 79 states. [2020-11-11 21:35:27,210 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 79 to 58. [2020-11-11 21:35:27,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.491228070175439) internal successors, (142), 57 states have internal predecessors, (142), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:27,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 142 transitions. [2020-11-11 21:35:27,211 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 142 transitions. Word has length 23 [2020-11-11 21:35:27,211 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:27,211 INFO L481 AbstractCegarLoop]: Abstraction has 58 states and 142 transitions. [2020-11-11 21:35:27,211 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:27,212 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 142 transitions. [2020-11-11 21:35:27,212 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-11 21:35:27,212 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:27,212 INFO L494 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:27,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-11-11 21:35:27,422 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:27,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:27,422 INFO L82 PathProgramCache]: Analyzing trace with hash -1389694665, now seen corresponding path program 41 times [2020-11-11 21:35:27,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:27,423 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [23530448] [2020-11-11 21:35:27,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:27,432 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:27,624 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:27,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [23530448] [2020-11-11 21:35:27,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [541605941] [2020-11-11 21:35:27,625 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:27,679 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 8 check-sat command(s) [2020-11-11 21:35:27,679 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:27,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 19 conjunts are in the unsatisfiable core [2020-11-11 21:35:27,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:27,695 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:27,695 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:27,695 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 17 [2020-11-11 21:35:27,695 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1937459554] [2020-11-11 21:35:27,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 19 states [2020-11-11 21:35:27,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:27,696 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2020-11-11 21:35:27,696 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-11-11 21:35:27,696 INFO L87 Difference]: Start difference. First operand 58 states and 142 transitions. Second operand has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:28,057 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:28,058 INFO L93 Difference]: Finished difference Result 90 states and 209 transitions. [2020-11-11 21:35:28,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-11-11 21:35:28,058 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2020-11-11 21:35:28,058 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:28,059 INFO L225 Difference]: With dead ends: 90 [2020-11-11 21:35:28,059 INFO L226 Difference]: Without dead ends: 84 [2020-11-11 21:35:28,060 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 54 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 190 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=363, Invalid=759, Unknown=0, NotChecked=0, Total=1122 [2020-11-11 21:35:28,061 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2020-11-11 21:35:28,063 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 66. [2020-11-11 21:35:28,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.476923076923077) internal successors, (161), 65 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:28,063 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 161 transitions. [2020-11-11 21:35:28,063 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 161 transitions. Word has length 23 [2020-11-11 21:35:28,063 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:28,064 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 161 transitions. [2020-11-11 21:35:28,064 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 19 states, 18 states have (on average 1.2777777777777777) internal successors, (23), 18 states have internal predecessors, (23), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:28,064 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 161 transitions. [2020-11-11 21:35:28,064 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 24 [2020-11-11 21:35:28,064 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:28,064 INFO L494 BasicCegarLoop]: trace histogram [8, 7, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:28,273 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:28,274 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:28,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:28,274 INFO L82 PathProgramCache]: Analyzing trace with hash 731812339, now seen corresponding path program 42 times [2020-11-11 21:35:28,275 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:28,275 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336449050] [2020-11-11 21:35:28,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:28,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:28,435 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:28,435 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336449050] [2020-11-11 21:35:28,436 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674745310] [2020-11-11 21:35:28,436 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:28,504 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 8 check-sat command(s) [2020-11-11 21:35:28,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:28,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 153 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 21:35:28,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:28,561 INFO L134 CoverageAnalysis]: Checked inductivity of 49 backedges. 0 proven. 49 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:28,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:28,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [17, 17] total 18 [2020-11-11 21:35:28,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [668727327] [2020-11-11 21:35:28,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 21:35:28,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:28,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 21:35:28,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=291, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:35:28,563 INFO L87 Difference]: Start difference. First operand 66 states and 161 transitions. Second operand has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:29,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:29,379 INFO L93 Difference]: Finished difference Result 125 states and 297 transitions. [2020-11-11 21:35:29,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-11-11 21:35:29,380 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 23 [2020-11-11 21:35:29,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:29,381 INFO L225 Difference]: With dead ends: 125 [2020-11-11 21:35:29,381 INFO L226 Difference]: Without dead ends: 116 [2020-11-11 21:35:29,382 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 20 SyntacticMatches, 1 SemanticMatches, 49 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 640 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=733, Invalid=1817, Unknown=0, NotChecked=0, Total=2550 [2020-11-11 21:35:29,382 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-11 21:35:29,384 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 79. [2020-11-11 21:35:29,384 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 79 states, 78 states have (on average 2.576923076923077) internal successors, (201), 78 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:29,385 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 201 transitions. [2020-11-11 21:35:29,385 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 201 transitions. Word has length 23 [2020-11-11 21:35:29,385 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:29,385 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 201 transitions. [2020-11-11 21:35:29,385 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.3157894736842106) internal successors, (25), 19 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:29,385 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 201 transitions. [2020-11-11 21:35:29,386 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-11 21:35:29,386 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:29,386 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:29,595 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-11-11 21:35:29,596 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:29,596 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:29,597 INFO L82 PathProgramCache]: Analyzing trace with hash -1034183506, now seen corresponding path program 43 times [2020-11-11 21:35:29,597 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:29,597 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [773522513] [2020-11-11 21:35:29,597 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:29,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:29,830 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:29,830 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [773522513] [2020-11-11 21:35:29,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1281464679] [2020-11-11 21:35:29,831 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:29,883 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:29,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 21:35:29,885 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:29,909 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:29,909 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:29,909 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 18 [2020-11-11 21:35:29,909 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1760846196] [2020-11-11 21:35:29,910 INFO L461 AbstractCegarLoop]: Interpolant automaton has 20 states [2020-11-11 21:35:29,910 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:29,910 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2020-11-11 21:35:29,910 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=94, Invalid=286, Unknown=0, NotChecked=0, Total=380 [2020-11-11 21:35:29,911 INFO L87 Difference]: Start difference. First operand 79 states and 201 transitions. Second operand has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:30,316 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:30,316 INFO L93 Difference]: Finished difference Result 124 states and 291 transitions. [2020-11-11 21:35:30,316 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 21:35:30,317 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2020-11-11 21:35:30,317 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:30,318 INFO L225 Difference]: With dead ends: 124 [2020-11-11 21:35:30,318 INFO L226 Difference]: Without dead ends: 118 [2020-11-11 21:35:30,319 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 58 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 220 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=405, Invalid=927, Unknown=0, NotChecked=0, Total=1332 [2020-11-11 21:35:30,320 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-11-11 21:35:30,322 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 81. [2020-11-11 21:35:30,322 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 81 states, 80 states have (on average 2.5625) internal successors, (205), 80 states have internal predecessors, (205), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:30,322 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 81 states to 81 states and 205 transitions. [2020-11-11 21:35:30,323 INFO L78 Accepts]: Start accepts. Automaton has 81 states and 205 transitions. Word has length 24 [2020-11-11 21:35:30,323 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:30,323 INFO L481 AbstractCegarLoop]: Abstraction has 81 states and 205 transitions. [2020-11-11 21:35:30,323 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 20 states, 19 states have (on average 1.263157894736842) internal successors, (24), 19 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:30,323 INFO L276 IsEmpty]: Start isEmpty. Operand 81 states and 205 transitions. [2020-11-11 21:35:30,323 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-11 21:35:30,323 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:30,324 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:30,533 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:30,533 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:30,534 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:30,534 INFO L82 PathProgramCache]: Analyzing trace with hash 1087323498, now seen corresponding path program 44 times [2020-11-11 21:35:30,534 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:30,535 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [725705670] [2020-11-11 21:35:30,535 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:30,545 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:30,726 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:30,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [725705670] [2020-11-11 21:35:30,727 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [956173811] [2020-11-11 21:35:30,727 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-11-11 21:35:30,783 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:30,783 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:30,784 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 21:35:30,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:30,812 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:30,826 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:30,826 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:30,826 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 21:35:30,826 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174793421] [2020-11-11 21:35:30,827 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 21:35:30,827 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:30,827 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 21:35:30,827 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=98, Invalid=322, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:35:30,828 INFO L87 Difference]: Start difference. First operand 81 states and 205 transitions. Second operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:31,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:31,790 INFO L93 Difference]: Finished difference Result 109 states and 265 transitions. [2020-11-11 21:35:31,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 37 states. [2020-11-11 21:35:31,790 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2020-11-11 21:35:31,791 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:31,792 INFO L225 Difference]: With dead ends: 109 [2020-11-11 21:35:31,792 INFO L226 Difference]: Without dead ends: 100 [2020-11-11 21:35:31,794 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 721 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=897, Invalid=1965, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 21:35:31,794 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-11-11 21:35:31,796 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 61. [2020-11-11 21:35:31,796 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 61 states, 60 states have (on average 2.466666666666667) internal successors, (148), 60 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:31,797 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 61 states to 61 states and 148 transitions. [2020-11-11 21:35:31,797 INFO L78 Accepts]: Start accepts. Automaton has 61 states and 148 transitions. Word has length 24 [2020-11-11 21:35:31,797 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:31,797 INFO L481 AbstractCegarLoop]: Abstraction has 61 states and 148 transitions. [2020-11-11 21:35:31,797 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:31,797 INFO L276 IsEmpty]: Start isEmpty. Operand 61 states and 148 transitions. [2020-11-11 21:35:31,797 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 25 [2020-11-11 21:35:31,798 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:31,798 INFO L494 BasicCegarLoop]: trace histogram [8, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:32,004 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-11-11 21:35:32,005 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:32,005 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:32,005 INFO L82 PathProgramCache]: Analyzing trace with hash 1211368486, now seen corresponding path program 45 times [2020-11-11 21:35:32,006 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:32,006 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [432495710] [2020-11-11 21:35:32,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:32,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:32,159 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:32,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [432495710] [2020-11-11 21:35:32,160 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1015407792] [2020-11-11 21:35:32,160 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:32,232 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 8 check-sat command(s) [2020-11-11 21:35:32,232 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:32,233 INFO L263 TraceCheckSpWp]: Trace formula consists of 158 conjuncts, 20 conjunts are in the unsatisfiable core [2020-11-11 21:35:32,234 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:32,261 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:32,277 INFO L134 CoverageAnalysis]: Checked inductivity of 56 backedges. 0 proven. 56 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:32,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:32,278 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [18, 18] total 19 [2020-11-11 21:35:32,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1058451740] [2020-11-11 21:35:32,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 21:35:32,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:32,279 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 21:35:32,279 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=99, Invalid=321, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:35:32,279 INFO L87 Difference]: Start difference. First operand 61 states and 148 transitions. Second operand has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:33,122 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:33,122 INFO L93 Difference]: Finished difference Result 108 states and 263 transitions. [2020-11-11 21:35:33,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 21:35:33,123 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 24 [2020-11-11 21:35:33,123 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:33,124 INFO L225 Difference]: With dead ends: 108 [2020-11-11 21:35:33,124 INFO L226 Difference]: Without dead ends: 103 [2020-11-11 21:35:33,125 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 74 GetRequests, 21 SyntacticMatches, 1 SemanticMatches, 52 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 783 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=938, Invalid=1924, Unknown=0, NotChecked=0, Total=2862 [2020-11-11 21:35:33,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 103 states. [2020-11-11 21:35:33,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 103 to 82. [2020-11-11 21:35:33,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 82 states, 81 states have (on average 2.580246913580247) internal successors, (209), 81 states have internal predecessors, (209), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:33,128 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 209 transitions. [2020-11-11 21:35:33,128 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 209 transitions. Word has length 24 [2020-11-11 21:35:33,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:33,128 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 209 transitions. [2020-11-11 21:35:33,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.3) internal successors, (26), 20 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:33,129 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 209 transitions. [2020-11-11 21:35:33,129 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-11 21:35:33,129 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:33,129 INFO L494 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:33,339 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:33,340 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:33,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:33,341 INFO L82 PathProgramCache]: Analyzing trace with hash -652687473, now seen corresponding path program 46 times [2020-11-11 21:35:33,341 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:33,342 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779010627] [2020-11-11 21:35:33,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:33,350 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:33,525 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:33,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779010627] [2020-11-11 21:35:33,525 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [899378894] [2020-11-11 21:35:33,525 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:33,581 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:33,581 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:33,582 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 21:35:33,583 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:33,607 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:33,623 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:33,623 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:33,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 21:35:33,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1941995492] [2020-11-11 21:35:33,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 21:35:33,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:33,624 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 21:35:33,624 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=109, Invalid=353, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:35:33,624 INFO L87 Difference]: Start difference. First operand 82 states and 209 transitions. Second operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:34,606 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:34,606 INFO L93 Difference]: Finished difference Result 90 states and 229 transitions. [2020-11-11 21:35:34,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 36 states. [2020-11-11 21:35:34,607 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2020-11-11 21:35:34,607 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:34,608 INFO L225 Difference]: With dead ends: 90 [2020-11-11 21:35:34,608 INFO L226 Difference]: Without dead ends: 85 [2020-11-11 21:35:34,610 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 76 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 53 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 749 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=955, Invalid=2015, Unknown=0, NotChecked=0, Total=2970 [2020-11-11 21:35:34,610 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 85 states. [2020-11-11 21:35:34,611 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 85 to 62. [2020-11-11 21:35:34,612 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 62 states, 61 states have (on average 2.4918032786885247) internal successors, (152), 61 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:34,612 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 62 states to 62 states and 152 transitions. [2020-11-11 21:35:34,612 INFO L78 Accepts]: Start accepts. Automaton has 62 states and 152 transitions. Word has length 25 [2020-11-11 21:35:34,612 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:34,612 INFO L481 AbstractCegarLoop]: Abstraction has 62 states and 152 transitions. [2020-11-11 21:35:34,612 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:34,613 INFO L276 IsEmpty]: Start isEmpty. Operand 62 states and 152 transitions. [2020-11-11 21:35:34,613 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-11 21:35:34,613 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:34,613 INFO L494 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:34,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-11-11 21:35:34,819 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:34,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:34,820 INFO L82 PathProgramCache]: Analyzing trace with hash 238260530, now seen corresponding path program 47 times [2020-11-11 21:35:34,820 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:34,820 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1171347163] [2020-11-11 21:35:34,820 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:34,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:35,081 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:35,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1171347163] [2020-11-11 21:35:35,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1984595862] [2020-11-11 21:35:35,082 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:35,143 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 9 check-sat command(s) [2020-11-11 21:35:35,143 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:35,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 21:35:35,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:35,161 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:35,161 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:35,161 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 19 [2020-11-11 21:35:35,162 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [191527673] [2020-11-11 21:35:35,162 INFO L461 AbstractCegarLoop]: Interpolant automaton has 21 states [2020-11-11 21:35:35,162 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:35,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 21 interpolants. [2020-11-11 21:35:35,163 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=112, Invalid=308, Unknown=0, NotChecked=0, Total=420 [2020-11-11 21:35:35,163 INFO L87 Difference]: Start difference. First operand 62 states and 152 transitions. Second operand has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:35,600 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:35,600 INFO L93 Difference]: Finished difference Result 96 states and 223 transitions. [2020-11-11 21:35:35,601 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-11-11 21:35:35,601 INFO L78 Accepts]: Start accepts. Automaton has has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2020-11-11 21:35:35,601 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:35,602 INFO L225 Difference]: With dead ends: 96 [2020-11-11 21:35:35,602 INFO L226 Difference]: Without dead ends: 90 [2020-11-11 21:35:35,603 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 60 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 241 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=453, Invalid=953, Unknown=0, NotChecked=0, Total=1406 [2020-11-11 21:35:35,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-11-11 21:35:35,605 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 70. [2020-11-11 21:35:35,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.4782608695652173) internal successors, (171), 69 states have internal predecessors, (171), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:35,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 171 transitions. [2020-11-11 21:35:35,606 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 171 transitions. Word has length 25 [2020-11-11 21:35:35,606 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:35,606 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 171 transitions. [2020-11-11 21:35:35,606 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 21 states, 20 states have (on average 1.25) internal successors, (25), 20 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:35,606 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 171 transitions. [2020-11-11 21:35:35,606 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 26 [2020-11-11 21:35:35,607 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:35,607 INFO L494 BasicCegarLoop]: trace histogram [9, 8, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:35,809 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-11-11 21:35:35,810 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:35,810 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:35,810 INFO L82 PathProgramCache]: Analyzing trace with hash -1102255336, now seen corresponding path program 48 times [2020-11-11 21:35:35,811 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:35,811 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [991455962] [2020-11-11 21:35:35,811 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:35,821 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:36,008 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:36,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [991455962] [2020-11-11 21:35:36,008 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [862153187] [2020-11-11 21:35:36,008 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:36,068 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 9 check-sat command(s) [2020-11-11 21:35:36,068 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:36,069 INFO L263 TraceCheckSpWp]: Trace formula consists of 163 conjuncts, 21 conjunts are in the unsatisfiable core [2020-11-11 21:35:36,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:36,093 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:36,115 INFO L134 CoverageAnalysis]: Checked inductivity of 64 backedges. 0 proven. 64 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:36,116 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:36,116 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [19, 19] total 20 [2020-11-11 21:35:36,116 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [602425] [2020-11-11 21:35:36,116 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 21:35:36,116 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:36,117 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 21:35:36,117 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=108, Invalid=354, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:35:36,117 INFO L87 Difference]: Start difference. First operand 70 states and 171 transitions. Second operand has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:37,144 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:37,145 INFO L93 Difference]: Finished difference Result 135 states and 321 transitions. [2020-11-11 21:35:37,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 39 states. [2020-11-11 21:35:37,145 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 25 [2020-11-11 21:35:37,146 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:37,147 INFO L225 Difference]: With dead ends: 135 [2020-11-11 21:35:37,147 INFO L226 Difference]: Without dead ends: 126 [2020-11-11 21:35:37,149 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 78 GetRequests, 22 SyntacticMatches, 1 SemanticMatches, 55 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 866 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=997, Invalid=2195, Unknown=0, NotChecked=0, Total=3192 [2020-11-11 21:35:37,150 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-11-11 21:35:37,152 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 85. [2020-11-11 21:35:37,152 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 85 states, 84 states have (on average 2.5833333333333335) internal successors, (217), 84 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:37,152 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 85 states to 85 states and 217 transitions. [2020-11-11 21:35:37,152 INFO L78 Accepts]: Start accepts. Automaton has 85 states and 217 transitions. Word has length 25 [2020-11-11 21:35:37,152 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:37,153 INFO L481 AbstractCegarLoop]: Abstraction has 85 states and 217 transitions. [2020-11-11 21:35:37,153 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.2857142857142858) internal successors, (27), 21 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:37,153 INFO L276 IsEmpty]: Start isEmpty. Operand 85 states and 217 transitions. [2020-11-11 21:35:37,153 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-11 21:35:37,153 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:37,153 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:37,363 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-11-11 21:35:37,363 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:37,364 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:37,364 INFO L82 PathProgramCache]: Analyzing trace with hash -1712899351, now seen corresponding path program 49 times [2020-11-11 21:35:37,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:37,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241896740] [2020-11-11 21:35:37,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:37,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:37,624 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:37,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241896740] [2020-11-11 21:35:37,624 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [10415529] [2020-11-11 21:35:37,625 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:37,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:37,675 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 21:35:37,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:37,697 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:37,697 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:37,698 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 20 [2020-11-11 21:35:37,698 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302797072] [2020-11-11 21:35:37,698 INFO L461 AbstractCegarLoop]: Interpolant automaton has 22 states [2020-11-11 21:35:37,698 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:37,698 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 22 interpolants. [2020-11-11 21:35:37,699 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=114, Invalid=348, Unknown=0, NotChecked=0, Total=462 [2020-11-11 21:35:37,699 INFO L87 Difference]: Start difference. First operand 85 states and 217 transitions. Second operand has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:38,190 INFO L93 Difference]: Finished difference Result 134 states and 315 transitions. [2020-11-11 21:35:38,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 21:35:38,191 INFO L78 Accepts]: Start accepts. Automaton has has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2020-11-11 21:35:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:38,192 INFO L225 Difference]: With dead ends: 134 [2020-11-11 21:35:38,192 INFO L226 Difference]: Without dead ends: 128 [2020-11-11 21:35:38,192 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 64 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 275 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=499, Invalid=1141, Unknown=0, NotChecked=0, Total=1640 [2020-11-11 21:35:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-11-11 21:35:38,195 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 87. [2020-11-11 21:35:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 87 states, 86 states have (on average 2.5697674418604652) internal successors, (221), 86 states have internal predecessors, (221), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 87 states to 87 states and 221 transitions. [2020-11-11 21:35:38,196 INFO L78 Accepts]: Start accepts. Automaton has 87 states and 221 transitions. Word has length 26 [2020-11-11 21:35:38,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:38,196 INFO L481 AbstractCegarLoop]: Abstraction has 87 states and 221 transitions. [2020-11-11 21:35:38,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 22 states, 21 states have (on average 1.2380952380952381) internal successors, (26), 21 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:38,196 INFO L276 IsEmpty]: Start isEmpty. Operand 87 states and 221 transitions. [2020-11-11 21:35:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-11 21:35:38,196 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:38,197 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:38,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-11-11 21:35:38,405 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:38,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:38,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1241552079, now seen corresponding path program 50 times [2020-11-11 21:35:38,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:38,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843617693] [2020-11-11 21:35:38,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:38,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:38,614 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:38,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843617693] [2020-11-11 21:35:38,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [710910080] [2020-11-11 21:35:38,614 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:38,670 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:38,670 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:38,671 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 21:35:38,673 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:38,699 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:38,715 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:38,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:38,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 21:35:38,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1598597692] [2020-11-11 21:35:38,716 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 21:35:38,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:38,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 21:35:38,717 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=118, Invalid=388, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:35:38,717 INFO L87 Difference]: Start difference. First operand 87 states and 221 transitions. Second operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:39,898 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:39,898 INFO L93 Difference]: Finished difference Result 117 states and 285 transitions. [2020-11-11 21:35:39,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 41 states. [2020-11-11 21:35:39,899 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2020-11-11 21:35:39,899 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:39,900 INFO L225 Difference]: With dead ends: 117 [2020-11-11 21:35:39,900 INFO L226 Difference]: Without dead ends: 108 [2020-11-11 21:35:39,900 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 911 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=2434, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 21:35:39,901 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-11-11 21:35:39,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 65. [2020-11-11 21:35:39,903 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 65 states, 64 states have (on average 2.46875) internal successors, (158), 64 states have internal predecessors, (158), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:39,903 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 65 states to 65 states and 158 transitions. [2020-11-11 21:35:39,904 INFO L78 Accepts]: Start accepts. Automaton has 65 states and 158 transitions. Word has length 26 [2020-11-11 21:35:39,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:39,904 INFO L481 AbstractCegarLoop]: Abstraction has 65 states and 158 transitions. [2020-11-11 21:35:39,904 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:39,904 INFO L276 IsEmpty]: Start isEmpty. Operand 65 states and 158 transitions. [2020-11-11 21:35:39,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 27 [2020-11-11 21:35:39,904 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:39,905 INFO L494 BasicCegarLoop]: trace histogram [9, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:40,105 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:40,105 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:40,106 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:40,106 INFO L82 PathProgramCache]: Analyzing trace with hash 189845409, now seen corresponding path program 51 times [2020-11-11 21:35:40,106 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:40,107 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1364515766] [2020-11-11 21:35:40,107 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:40,115 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:40,318 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:40,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1364515766] [2020-11-11 21:35:40,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1246722543] [2020-11-11 21:35:40,319 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:40,378 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 9 check-sat command(s) [2020-11-11 21:35:40,378 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:40,379 INFO L263 TraceCheckSpWp]: Trace formula consists of 168 conjuncts, 22 conjunts are in the unsatisfiable core [2020-11-11 21:35:40,380 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:40,404 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:40,422 INFO L134 CoverageAnalysis]: Checked inductivity of 72 backedges. 0 proven. 72 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:40,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:40,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [20, 20] total 21 [2020-11-11 21:35:40,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [347470382] [2020-11-11 21:35:40,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 21:35:40,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:40,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 21:35:40,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=119, Invalid=387, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:35:40,423 INFO L87 Difference]: Start difference. First operand 65 states and 158 transitions. Second operand has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:41,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:41,486 INFO L93 Difference]: Finished difference Result 116 states and 283 transitions. [2020-11-11 21:35:41,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 21:35:41,487 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 26 [2020-11-11 21:35:41,487 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:41,488 INFO L225 Difference]: With dead ends: 116 [2020-11-11 21:35:41,488 INFO L226 Difference]: Without dead ends: 111 [2020-11-11 21:35:41,489 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 82 GetRequests, 23 SyntacticMatches, 1 SemanticMatches, 58 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 987 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=1153, Invalid=2387, Unknown=0, NotChecked=0, Total=3540 [2020-11-11 21:35:41,489 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-11-11 21:35:41,491 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 88. [2020-11-11 21:35:41,491 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.586206896551724) internal successors, (225), 87 states have internal predecessors, (225), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:41,492 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 225 transitions. [2020-11-11 21:35:41,492 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 225 transitions. Word has length 26 [2020-11-11 21:35:41,492 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:41,492 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 225 transitions. [2020-11-11 21:35:41,492 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.2727272727272727) internal successors, (28), 22 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:41,492 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 225 transitions. [2020-11-11 21:35:41,493 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-11 21:35:41,493 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:41,493 INFO L494 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:41,702 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:41,702 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:41,703 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:41,703 INFO L82 PathProgramCache]: Analyzing trace with hash -166568758, now seen corresponding path program 52 times [2020-11-11 21:35:41,703 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:41,703 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1535955057] [2020-11-11 21:35:41,704 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:41,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:41,928 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:41,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1535955057] [2020-11-11 21:35:41,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [437756797] [2020-11-11 21:35:41,929 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:41,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:41,981 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:41,982 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 21:35:41,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:42,015 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:42,036 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:42,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:42,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 21:35:42,037 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075127493] [2020-11-11 21:35:42,037 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 21:35:42,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:42,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 21:35:42,038 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=130, Invalid=422, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:35:42,038 INFO L87 Difference]: Start difference. First operand 88 states and 225 transitions. Second operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:43,191 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:43,191 INFO L93 Difference]: Finished difference Result 96 states and 245 transitions. [2020-11-11 21:35:43,192 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 40 states. [2020-11-11 21:35:43,192 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2020-11-11 21:35:43,192 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:43,193 INFO L225 Difference]: With dead ends: 96 [2020-11-11 21:35:43,193 INFO L226 Difference]: Without dead ends: 91 [2020-11-11 21:35:43,194 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 84 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 59 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 942 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1171, Invalid=2489, Unknown=0, NotChecked=0, Total=3660 [2020-11-11 21:35:43,194 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 91 states. [2020-11-11 21:35:43,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 91 to 66. [2020-11-11 21:35:43,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.4923076923076923) internal successors, (162), 65 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:43,196 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 162 transitions. [2020-11-11 21:35:43,196 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 162 transitions. Word has length 27 [2020-11-11 21:35:43,197 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:43,197 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 162 transitions. [2020-11-11 21:35:43,197 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:43,197 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 162 transitions. [2020-11-11 21:35:43,197 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-11 21:35:43,197 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:43,198 INFO L494 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:43,405 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-11-11 21:35:43,406 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:43,406 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:43,406 INFO L82 PathProgramCache]: Analyzing trace with hash 1335107181, now seen corresponding path program 53 times [2020-11-11 21:35:43,407 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:43,407 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482988566] [2020-11-11 21:35:43,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:43,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:43,713 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:43,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482988566] [2020-11-11 21:35:43,713 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [818423794] [2020-11-11 21:35:43,713 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:43,767 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 10 check-sat command(s) [2020-11-11 21:35:43,767 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:43,768 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 23 conjunts are in the unsatisfiable core [2020-11-11 21:35:43,769 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:43,783 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:43,784 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:43,784 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 21 [2020-11-11 21:35:43,784 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761492731] [2020-11-11 21:35:43,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 23 states [2020-11-11 21:35:43,785 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:43,785 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 23 interpolants. [2020-11-11 21:35:43,785 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=134, Invalid=372, Unknown=0, NotChecked=0, Total=506 [2020-11-11 21:35:43,785 INFO L87 Difference]: Start difference. First operand 66 states and 162 transitions. Second operand has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:44,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:44,290 INFO L93 Difference]: Finished difference Result 102 states and 237 transitions. [2020-11-11 21:35:44,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-11-11 21:35:44,291 INFO L78 Accepts]: Start accepts. Automaton has has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2020-11-11 21:35:44,291 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:44,292 INFO L225 Difference]: With dead ends: 102 [2020-11-11 21:35:44,292 INFO L226 Difference]: Without dead ends: 96 [2020-11-11 21:35:44,293 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 66 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 298 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=553, Invalid=1169, Unknown=0, NotChecked=0, Total=1722 [2020-11-11 21:35:44,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-11-11 21:35:44,295 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 74. [2020-11-11 21:35:44,295 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.4794520547945207) internal successors, (181), 73 states have internal predecessors, (181), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:44,296 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 181 transitions. [2020-11-11 21:35:44,296 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 181 transitions. Word has length 27 [2020-11-11 21:35:44,296 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:44,296 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 181 transitions. [2020-11-11 21:35:44,296 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 23 states, 22 states have (on average 1.2272727272727273) internal successors, (27), 22 states have internal predecessors, (27), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:44,296 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 181 transitions. [2020-11-11 21:35:44,296 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 28 [2020-11-11 21:35:44,296 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:44,297 INFO L494 BasicCegarLoop]: trace histogram [10, 9, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:44,497 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:44,497 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:44,498 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:44,498 INFO L82 PathProgramCache]: Analyzing trace with hash 1590267645, now seen corresponding path program 54 times [2020-11-11 21:35:44,498 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:44,498 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [625918191] [2020-11-11 21:35:44,499 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:44,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:44,738 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:44,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [625918191] [2020-11-11 21:35:44,739 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1044724148] [2020-11-11 21:35:44,739 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:44,806 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 10 check-sat command(s) [2020-11-11 21:35:44,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:44,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 173 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 21:35:44,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:44,873 INFO L134 CoverageAnalysis]: Checked inductivity of 81 backedges. 0 proven. 81 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:44,873 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:44,873 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [21, 21] total 22 [2020-11-11 21:35:44,873 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1891584722] [2020-11-11 21:35:44,874 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 21:35:44,874 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:44,874 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 21:35:44,874 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=129, Invalid=423, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:35:44,875 INFO L87 Difference]: Start difference. First operand 74 states and 181 transitions. Second operand has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:46,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:46,034 INFO L93 Difference]: Finished difference Result 145 states and 345 transitions. [2020-11-11 21:35:46,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 43 states. [2020-11-11 21:35:46,035 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 27 [2020-11-11 21:35:46,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:46,036 INFO L225 Difference]: With dead ends: 145 [2020-11-11 21:35:46,037 INFO L226 Difference]: Without dead ends: 136 [2020-11-11 21:35:46,037 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 86 GetRequests, 24 SyntacticMatches, 1 SemanticMatches, 61 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1023 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=1106, Invalid=2800, Unknown=0, NotChecked=0, Total=3906 [2020-11-11 21:35:46,038 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-11-11 21:35:46,040 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 91. [2020-11-11 21:35:46,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 91 states, 90 states have (on average 2.588888888888889) internal successors, (233), 90 states have internal predecessors, (233), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:46,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 233 transitions. [2020-11-11 21:35:46,041 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 233 transitions. Word has length 27 [2020-11-11 21:35:46,041 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:46,041 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 233 transitions. [2020-11-11 21:35:46,041 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.2608695652173914) internal successors, (29), 23 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:46,041 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 233 transitions. [2020-11-11 21:35:46,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 21:35:46,042 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:46,042 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:46,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-11-11 21:35:46,252 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:46,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:46,252 INFO L82 PathProgramCache]: Analyzing trace with hash -1123797404, now seen corresponding path program 55 times [2020-11-11 21:35:46,253 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:46,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [613312984] [2020-11-11 21:35:46,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:46,262 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:46,580 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:46,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [613312984] [2020-11-11 21:35:46,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1947943781] [2020-11-11 21:35:46,580 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:46,640 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:46,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 21:35:46,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:46,659 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:46,660 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:46,660 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 22 [2020-11-11 21:35:46,660 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1158097804] [2020-11-11 21:35:46,660 INFO L461 AbstractCegarLoop]: Interpolant automaton has 24 states [2020-11-11 21:35:46,660 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:46,661 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 24 interpolants. [2020-11-11 21:35:46,661 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=136, Invalid=416, Unknown=0, NotChecked=0, Total=552 [2020-11-11 21:35:46,661 INFO L87 Difference]: Start difference. First operand 91 states and 233 transitions. Second operand has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:47,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:47,244 INFO L93 Difference]: Finished difference Result 144 states and 339 transitions. [2020-11-11 21:35:47,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-11-11 21:35:47,245 INFO L78 Accepts]: Start accepts. Automaton has has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-11 21:35:47,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:47,247 INFO L225 Difference]: With dead ends: 144 [2020-11-11 21:35:47,247 INFO L226 Difference]: Without dead ends: 138 [2020-11-11 21:35:47,247 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 70 GetRequests, 26 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 336 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=603, Invalid=1377, Unknown=0, NotChecked=0, Total=1980 [2020-11-11 21:35:47,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-11-11 21:35:47,250 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 93. [2020-11-11 21:35:47,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 93 states, 92 states have (on average 2.5760869565217392) internal successors, (237), 92 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:47,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 93 states to 93 states and 237 transitions. [2020-11-11 21:35:47,251 INFO L78 Accepts]: Start accepts. Automaton has 93 states and 237 transitions. Word has length 28 [2020-11-11 21:35:47,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:47,251 INFO L481 AbstractCegarLoop]: Abstraction has 93 states and 237 transitions. [2020-11-11 21:35:47,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 24 states, 23 states have (on average 1.2173913043478262) internal successors, (28), 23 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:47,251 INFO L276 IsEmpty]: Start isEmpty. Operand 93 states and 237 transitions. [2020-11-11 21:35:47,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 21:35:47,252 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:47,252 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:47,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-11-11 21:35:47,461 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:47,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:47,461 INFO L82 PathProgramCache]: Analyzing trace with hash -868636940, now seen corresponding path program 56 times [2020-11-11 21:35:47,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:47,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [366868511] [2020-11-11 21:35:47,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:47,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:47,720 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:47,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [366868511] [2020-11-11 21:35:47,720 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1472096303] [2020-11-11 21:35:47,721 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:47,787 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-11-11 21:35:47,787 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:47,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 21:35:47,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:47,816 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-11-11 21:35:47,833 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:47,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:47,834 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 21:35:47,834 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [430776700] [2020-11-11 21:35:47,834 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 21:35:47,834 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:47,835 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 21:35:47,835 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=140, Invalid=460, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:35:47,835 INFO L87 Difference]: Start difference. First operand 93 states and 237 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:49,244 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:49,244 INFO L93 Difference]: Finished difference Result 125 states and 305 transitions. [2020-11-11 21:35:49,245 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 45 states. [2020-11-11 21:35:49,245 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-11 21:35:49,245 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:49,246 INFO L225 Difference]: With dead ends: 125 [2020-11-11 21:35:49,246 INFO L226 Difference]: Without dead ends: 116 [2020-11-11 21:35:49,247 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1123 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=1337, Invalid=2953, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 21:35:49,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-11-11 21:35:49,249 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 69. [2020-11-11 21:35:49,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 69 states, 68 states have (on average 2.4705882352941178) internal successors, (168), 68 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:49,250 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 69 states to 69 states and 168 transitions. [2020-11-11 21:35:49,250 INFO L78 Accepts]: Start accepts. Automaton has 69 states and 168 transitions. Word has length 28 [2020-11-11 21:35:49,250 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:49,250 INFO L481 AbstractCegarLoop]: Abstraction has 69 states and 168 transitions. [2020-11-11 21:35:49,250 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:49,251 INFO L276 IsEmpty]: Start isEmpty. Operand 69 states and 168 transitions. [2020-11-11 21:35:49,251 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 29 [2020-11-11 21:35:49,251 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:49,251 INFO L494 BasicCegarLoop]: trace histogram [10, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:49,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-11-11 21:35:49,461 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:49,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:49,461 INFO L82 PathProgramCache]: Analyzing trace with hash 2053679196, now seen corresponding path program 57 times [2020-11-11 21:35:49,462 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:49,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [110981783] [2020-11-11 21:35:49,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:49,472 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:49,702 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:49,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [110981783] [2020-11-11 21:35:49,703 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911302626] [2020-11-11 21:35:49,703 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:49,766 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 10 check-sat command(s) [2020-11-11 21:35:49,766 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:49,767 INFO L263 TraceCheckSpWp]: Trace formula consists of 178 conjuncts, 24 conjunts are in the unsatisfiable core [2020-11-11 21:35:49,768 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:49,794 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-11-11 21:35:49,818 INFO L134 CoverageAnalysis]: Checked inductivity of 90 backedges. 0 proven. 90 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:49,818 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-11-11 21:35:49,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [22, 22] total 23 [2020-11-11 21:35:49,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097298523] [2020-11-11 21:35:49,819 INFO L461 AbstractCegarLoop]: Interpolant automaton has 25 states [2020-11-11 21:35:49,819 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:49,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 25 interpolants. [2020-11-11 21:35:49,820 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=141, Invalid=459, Unknown=0, NotChecked=0, Total=600 [2020-11-11 21:35:49,820 INFO L87 Difference]: Start difference. First operand 69 states and 168 transitions. Second operand has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:51,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:51,090 INFO L93 Difference]: Finished difference Result 124 states and 303 transitions. [2020-11-11 21:35:51,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 44 states. [2020-11-11 21:35:51,091 INFO L78 Accepts]: Start accepts. Automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 28 [2020-11-11 21:35:51,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:51,092 INFO L225 Difference]: With dead ends: 124 [2020-11-11 21:35:51,092 INFO L226 Difference]: Without dead ends: 119 [2020-11-11 21:35:51,093 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 90 GetRequests, 25 SyntacticMatches, 1 SemanticMatches, 64 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1213 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=1390, Invalid=2900, Unknown=0, NotChecked=0, Total=4290 [2020-11-11 21:35:51,093 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 119 states. [2020-11-11 21:35:51,096 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 119 to 94. [2020-11-11 21:35:51,096 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.5913978494623655) internal successors, (241), 93 states have internal predecessors, (241), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:51,096 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 241 transitions. [2020-11-11 21:35:51,097 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 241 transitions. Word has length 28 [2020-11-11 21:35:51,097 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:51,097 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 241 transitions. [2020-11-11 21:35:51,097 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 25 states, 24 states have (on average 1.25) internal successors, (30), 24 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:51,097 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 241 transitions. [2020-11-11 21:35:51,097 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-11 21:35:51,098 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:51,098 INFO L494 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:51,307 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 55 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-11-11 21:35:51,308 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:51,308 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:51,308 INFO L82 PathProgramCache]: Analyzing trace with hash -1157918907, now seen corresponding path program 58 times [2020-11-11 21:35:51,309 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:51,309 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [875142468] [2020-11-11 21:35:51,309 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:51,316 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:51,429 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 72 proven. 28 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [875142468] [2020-11-11 21:35:51,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2108429631] [2020-11-11 21:35:51,430 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:51,481 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-11-11 21:35:51,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:51,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 132 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:35:51,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:51,505 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:51,506 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:35:51,506 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [13] total 15 [2020-11-11 21:35:51,506 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010837736] [2020-11-11 21:35:51,506 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:35:51,506 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:51,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:35:51,507 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:35:51,507 INFO L87 Difference]: Start difference. First operand 94 states and 241 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:51,530 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:51,530 INFO L93 Difference]: Finished difference Result 421 states and 1013 transitions. [2020-11-11 21:35:51,531 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:35:51,531 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2020-11-11 21:35:51,531 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:51,531 INFO L225 Difference]: With dead ends: 421 [2020-11-11 21:35:51,532 INFO L226 Difference]: Without dead ends: 70 [2020-11-11 21:35:51,532 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 28 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=85, Invalid=125, Unknown=0, NotChecked=0, Total=210 [2020-11-11 21:35:51,532 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-11-11 21:35:51,533 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 70. [2020-11-11 21:35:51,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.028985507246377) internal successors, (140), 69 states have internal predecessors, (140), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:51,534 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 140 transitions. [2020-11-11 21:35:51,534 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 140 transitions. Word has length 29 [2020-11-11 21:35:51,534 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:51,534 INFO L481 AbstractCegarLoop]: Abstraction has 70 states and 140 transitions. [2020-11-11 21:35:51,534 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:51,534 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 140 transitions. [2020-11-11 21:35:51,535 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 30 [2020-11-11 21:35:51,535 INFO L486 BasicCegarLoop]: Found error trace [2020-11-11 21:35:51,535 INFO L494 BasicCegarLoop]: trace histogram [11, 10, 1, 1, 1, 1, 1, 1, 1, 1] [2020-11-11 21:35:51,740 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 56 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-11-11 21:35:51,740 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-11-11 21:35:51,741 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-11-11 21:35:51,741 INFO L82 PathProgramCache]: Analyzing trace with hash -1157216024, now seen corresponding path program 59 times [2020-11-11 21:35:51,741 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-11-11 21:35:51,741 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [742857396] [2020-11-11 21:35:51,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-11-11 21:35:51,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-11-11 21:35:52,153 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 0 proven. 100 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:52,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [742857396] [2020-11-11 21:35:52,154 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1651910030] [2020-11-11 21:35:52,154 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:52,215 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 11 check-sat command(s) [2020-11-11 21:35:52,215 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-11-11 21:35:52,216 INFO L263 TraceCheckSpWp]: Trace formula consists of 183 conjuncts, 12 conjunts are in the unsatisfiable core [2020-11-11 21:35:52,217 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-11-11 21:35:52,489 INFO L134 CoverageAnalysis]: Checked inductivity of 100 backedges. 100 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-11-11 21:35:52,489 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 1 imperfect interpolant sequences. [2020-11-11 21:35:52,489 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [13] imperfect sequences [23] total 36 [2020-11-11 21:35:52,490 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [254898439] [2020-11-11 21:35:52,490 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-11-11 21:35:52,490 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-11-11 21:35:52,490 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-11-11 21:35:52,490 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 21:35:52,491 INFO L87 Difference]: Start difference. First operand 70 states and 140 transitions. Second operand has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:52,514 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-11-11 21:35:52,514 INFO L93 Difference]: Finished difference Result 256 states and 475 transitions. [2020-11-11 21:35:52,515 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-11-11 21:35:52,515 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 29 [2020-11-11 21:35:52,515 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-11-11 21:35:52,515 INFO L225 Difference]: With dead ends: 256 [2020-11-11 21:35:52,515 INFO L226 Difference]: Without dead ends: 0 [2020-11-11 21:35:52,516 INFO L749 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 17 SyntacticMatches, 0 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 352 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=235, Invalid=1025, Unknown=0, NotChecked=0, Total=1260 [2020-11-11 21:35:52,516 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2020-11-11 21:35:52,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2020-11-11 21:35:52,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:52,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2020-11-11 21:35:52,516 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 29 [2020-11-11 21:35:52,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-11-11 21:35:52,516 INFO L481 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2020-11-11 21:35:52,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has has 13 states, 13 states have (on average 2.230769230769231) internal successors, (29), 13 states have internal predecessors, (29), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2020-11-11 21:35:52,516 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2020-11-11 21:35:52,517 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2020-11-11 21:35:52,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-11-11 21:35:52,722 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 11.11 09:35:52 BasicIcfg [2020-11-11 21:35:52,722 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-11-11 21:35:52,723 INFO L168 Benchmark]: Toolchain (without parser) took 61220.12 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 277.5 MB in the beginning and 365.8 MB in the end (delta: -88.2 MB). Peak memory consumption was 47.7 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:52,723 INFO L168 Benchmark]: CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 272.6 MB. There was no memory consumed. Max. memory is 16.0 GB. [2020-11-11 21:35:52,723 INFO L168 Benchmark]: CACSL2BoogieTranslator took 673.53 ms. Allocated memory is still 302.0 MB. Free memory was 276.8 MB in the beginning and 247.9 MB in the end (delta: 28.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:52,724 INFO L168 Benchmark]: Boogie Procedure Inliner took 80.89 ms. Allocated memory is still 302.0 MB. Free memory was 247.7 MB in the beginning and 246.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:52,724 INFO L168 Benchmark]: Boogie Preprocessor took 62.61 ms. Allocated memory is still 302.0 MB. Free memory was 246.0 MB in the beginning and 244.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:52,724 INFO L168 Benchmark]: RCFGBuilder took 471.32 ms. Allocated memory is still 302.0 MB. Free memory was 244.5 MB in the beginning and 268.5 MB in the end (delta: -24.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:52,725 INFO L168 Benchmark]: TraceAbstraction took 59915.80 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 267.5 MB in the beginning and 365.8 MB in the end (delta: -98.3 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.0 GB. [2020-11-11 21:35:52,727 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.17 ms. Allocated memory is still 302.0 MB. Free memory is still 272.6 MB. There was no memory consumed. Max. memory is 16.0 GB. * CACSL2BoogieTranslator took 673.53 ms. Allocated memory is still 302.0 MB. Free memory was 276.8 MB in the beginning and 247.9 MB in the end (delta: 28.9 MB). Peak memory consumption was 29.4 MB. Max. memory is 16.0 GB. * Boogie Procedure Inliner took 80.89 ms. Allocated memory is still 302.0 MB. Free memory was 247.7 MB in the beginning and 246.0 MB in the end (delta: 1.7 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * Boogie Preprocessor took 62.61 ms. Allocated memory is still 302.0 MB. Free memory was 246.0 MB in the beginning and 244.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.0 GB. * RCFGBuilder took 471.32 ms. Allocated memory is still 302.0 MB. Free memory was 244.5 MB in the beginning and 268.5 MB in the end (delta: -24.0 MB). Peak memory consumption was 9.2 MB. Max. memory is 16.0 GB. * TraceAbstraction took 59915.80 ms. Allocated memory was 302.0 MB in the beginning and 436.2 MB in the end (delta: 134.2 MB). Free memory was 267.5 MB in the beginning and 365.8 MB in the end (delta: -98.3 MB). Peak memory consumption was 36.4 MB. Max. memory is 16.0 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 777 VarBasedMoverChecksPositive, 15 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 15 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 4.0s, 65 PlacesBefore, 20 PlacesAfterwards, 64 TransitionsBefore, 16 TransitionsAfterwards, 1144 CoEnabledTransitionPairs, 5 FixpointIterations, 16 TrivialSequentialCompositions, 32 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 12 ConcurrentYvCompositions, 3 ChoiceCompositions, 63 TotalNumberOfCompositions, 1130 MoverChecksTotal - PositiveResult [Line: 685]: call of __VERIFIER_error() unreachable For all program executions holds that call of __VERIFIER_error() unreachable at this location - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 59 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: SAFE, OverallTime: 59.8s, OverallIterations: 61, TraceHistogramMax: 11, AutomataDifference: 28.6s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 4.0s, HoareTripleCheckerStatistics: 1009 SDtfs, 3427 SDslu, 4978 SDs, 0 SdLazy, 5366 SolverSat, 2747 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 5.7s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 2906 GetRequests, 954 SyntacticMatches, 54 SemanticMatches, 1898 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 18961 ImplicationChecksByTransitivity, 29.0s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=94occurred in iteration=59, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.2s AutomataMinimizationTime, 61 MinimizatonAttempts, 1283 StatesRemovedByMinimization, 58 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.5s SsaConstructionTime, 1.6s SatisfiabilityAnalysisTime, 10.4s InterpolantComputationTime, 2266 NumberOfCodeBlocks, 2263 NumberOfCodeBlocksAsserted, 280 NumberOfCheckSat, 2149 ConstructedInterpolants, 0 QuantifiedInterpolants, 182629 SizeOfPredicates, 621 NumberOfNonLiveVariables, 7632 ConjunctsInSsa, 867 ConjunctsInUnsatCore, 117 InterpolantComputations, 7 PerfectInterpolantSequences, 272/4090 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate proved your program to be correct! Received shutdown request...