/usr/bin/java -Xmx16000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-11af1e5 [2020-10-09 10:35:29,235 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-09 10:35:29,238 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-09 10:35:29,261 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-09 10:35:29,261 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-09 10:35:29,262 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-09 10:35:29,263 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-09 10:35:29,265 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-09 10:35:29,267 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-09 10:35:29,267 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-09 10:35:29,270 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-09 10:35:29,271 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-09 10:35:29,271 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-09 10:35:29,272 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-09 10:35:29,273 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-09 10:35:29,274 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-09 10:35:29,275 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-09 10:35:29,277 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-09 10:35:29,278 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-09 10:35:29,280 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-09 10:35:29,282 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-09 10:35:29,283 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-09 10:35:29,284 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-09 10:35:29,285 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-09 10:35:29,288 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-09 10:35:29,288 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-09 10:35:29,288 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-09 10:35:29,289 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-09 10:35:29,289 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-09 10:35:29,290 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-09 10:35:29,291 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-09 10:35:29,291 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-09 10:35:29,292 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-09 10:35:29,293 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-09 10:35:29,294 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-09 10:35:29,294 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-09 10:35:29,295 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-09 10:35:29,295 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-09 10:35:29,295 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-09 10:35:29,296 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-09 10:35:29,297 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-09 10:35:29,298 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/default/automizer/svcomp-Reach-32bit-Automizer_Default.epf [2020-10-09 10:35:29,321 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-09 10:35:29,321 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-09 10:35:29,323 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-09 10:35:29,323 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-09 10:35:29,323 INFO L138 SettingsManager]: * Use SBE=true [2020-10-09 10:35:29,323 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-09 10:35:29,323 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-09 10:35:29,324 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-09 10:35:29,324 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-09 10:35:29,324 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-09 10:35:29,324 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-09 10:35:29,324 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-09 10:35:29,325 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-09 10:35:29,325 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-09 10:35:29,325 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-09 10:35:29,325 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-09 10:35:29,325 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-09 10:35:29,326 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-09 10:35:29,326 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-09 10:35:29,326 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-09 10:35:29,326 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-09 10:35:29,326 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 10:35:29,327 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-09 10:35:29,327 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2020-10-09 10:35:29,327 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-09 10:35:29,327 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-09 10:35:29,327 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-09 10:35:29,328 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-09 10:35:29,328 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2020-10-09 10:35:29,328 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2020-10-09 10:35:29,640 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-09 10:35:29,660 INFO L258 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-09 10:35:29,665 INFO L214 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-09 10:35:29,666 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-09 10:35:29,667 INFO L275 PluginConnector]: CDTParser initialized [2020-10-09 10:35:29,668 INFO L429 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-09 10:35:29,731 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d380166ed/9d1cb9afd14f4cb7b415a22a8f60aec0/FLAG9ee95af2d [2020-10-09 10:35:30,277 INFO L306 CDTParser]: Found 1 translation units. [2020-10-09 10:35:30,278 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longest-1.i [2020-10-09 10:35:30,294 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d380166ed/9d1cb9afd14f4cb7b415a22a8f60aec0/FLAG9ee95af2d [2020-10-09 10:35:30,555 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/d380166ed/9d1cb9afd14f4cb7b415a22a8f60aec0 [2020-10-09 10:35:30,564 INFO L296 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-09 10:35:30,566 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-09 10:35:30,568 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-09 10:35:30,568 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-09 10:35:30,572 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-09 10:35:30,573 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 10:35:30" (1/1) ... [2020-10-09 10:35:30,576 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@6ea473ee and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:30, skipping insertion in model container [2020-10-09 10:35:30,576 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 09.10 10:35:30" (1/1) ... [2020-10-09 10:35:30,585 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-09 10:35:30,631 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-09 10:35:31,181 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 10:35:31,194 INFO L203 MainTranslator]: Completed pre-run [2020-10-09 10:35:31,269 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-09 10:35:31,340 INFO L208 MainTranslator]: Completed translation [2020-10-09 10:35:31,340 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31 WrapperNode [2020-10-09 10:35:31,340 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-09 10:35:31,341 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-09 10:35:31,341 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-09 10:35:31,342 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-09 10:35:31,350 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,364 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,385 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-09 10:35:31,385 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-09 10:35:31,386 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-09 10:35:31,386 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-09 10:35:31,393 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,393 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,396 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,396 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,402 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,406 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,408 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... [2020-10-09 10:35:31,410 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-09 10:35:31,411 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-09 10:35:31,411 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-09 10:35:31,411 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-09 10:35:31,412 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (1/1) ... No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 1 with z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-09 10:35:31,479 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-09 10:35:31,480 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-09 10:35:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-09 10:35:31,480 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-09 10:35:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-09 10:35:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-09 10:35:31,480 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-09 10:35:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-09 10:35:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-09 10:35:31,481 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-09 10:35:31,481 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-09 10:35:31,483 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-09 10:35:31,783 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-09 10:35:31,784 INFO L298 CfgBuilder]: Removed 6 assume(true) statements. [2020-10-09 10:35:31,786 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 10:35:31 BoogieIcfgContainer [2020-10-09 10:35:31,786 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-09 10:35:31,787 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-09 10:35:31,787 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-09 10:35:31,790 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-09 10:35:31,791 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 09.10 10:35:30" (1/3) ... [2020-10-09 10:35:31,791 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20507c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 10:35:31, skipping insertion in model container [2020-10-09 10:35:31,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 09.10 10:35:31" (2/3) ... [2020-10-09 10:35:31,792 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@20507c9c and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 09.10 10:35:31, skipping insertion in model container [2020-10-09 10:35:31,792 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 09.10 10:35:31" (3/3) ... [2020-10-09 10:35:31,794 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longest-1.i [2020-10-09 10:35:31,805 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-09 10:35:31,805 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2020-10-09 10:35:31,812 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-09 10:35:31,813 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-09 10:35:31,839 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,840 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,840 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,840 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,841 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,841 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,842 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,842 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,842 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,842 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,843 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,843 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,843 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,843 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,844 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,844 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,844 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,844 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,845 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,845 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,845 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,846 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,846 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,847 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,847 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,847 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,848 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,848 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,848 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,851 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,852 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,852 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,852 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,852 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,853 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork0_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,860 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#t~post2| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,860 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,860 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,861 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,861 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,861 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork1_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-09 10:35:31,883 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-09 10:35:31,907 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-09 10:35:31,907 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-09 10:35:31,908 INFO L379 AbstractCegarLoop]: Compute interpolants for FPandBP [2020-10-09 10:35:31,908 INFO L380 AbstractCegarLoop]: Backedges is STRAIGHT_LINE [2020-10-09 10:35:31,908 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-09 10:35:31,908 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-09 10:35:31,908 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-09 10:35:31,908 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-09 10:35:31,925 INFO L129 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2020-10-09 10:35:31,928 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:31,931 INFO L111 LiptonReduction]: Starting Lipton reduction on Petri net that has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:31,934 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 59 places, 57 transitions, 124 flow [2020-10-09 10:35:31,996 INFO L129 PetriNetUnfolder]: 5/55 cut-off events. [2020-10-09 10:35:31,996 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-09 10:35:32,002 INFO L80 FinitePrefix]: Finished finitePrefix Result has 62 conditions, 55 events. 5/55 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 84 event pairs, 0 based on Foata normal form. 0/49 useless extension candidates. Maximal degree in co-relation 43. Up to 2 conditions per place. [2020-10-09 10:35:32,004 INFO L117 LiptonReduction]: Number of co-enabled transitions 1032 [2020-10-09 10:35:33,062 WARN L193 SmtUtils]: Spent 131.00 ms on a formula simplification. DAG size of input: 64 DAG size of output: 60 [2020-10-09 10:35:33,172 INFO L132 LiptonReduction]: Checked pairs total: 1052 [2020-10-09 10:35:33,172 INFO L134 LiptonReduction]: Total number of compositions: 50 [2020-10-09 10:35:33,179 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 15 transitions, 40 flow [2020-10-09 10:35:33,191 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-09 10:35:33,193 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-09 10:35:33,200 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-09 10:35:33,200 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:33,201 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-09 10:35:33,201 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:33,207 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:33,207 INFO L82 PathProgramCache]: Analyzing trace with hash -1563716626, now seen corresponding path program 1 times [2020-10-09 10:35:33,217 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:33,218 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1180353352] [2020-10-09 10:35:33,218 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:33,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:33,430 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,431 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1180353352] [2020-10-09 10:35:33,432 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:33,432 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-09 10:35:33,433 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1109824610] [2020-10-09 10:35:33,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-09 10:35:33,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:33,453 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-09 10:35:33,454 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-09 10:35:33,456 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-09 10:35:33,526 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:33,526 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-09 10:35:33,527 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 10:35:33,528 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-09 10:35:33,529 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:33,541 INFO L225 Difference]: With dead ends: 83 [2020-10-09 10:35:33,541 INFO L226 Difference]: Without dead ends: 54 [2020-10-09 10:35:33,543 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:33,563 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-09 10:35:33,582 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-09 10:35:33,584 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-09 10:35:33,585 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-09 10:35:33,587 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-09 10:35:33,587 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:33,587 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-09 10:35:33,587 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-09 10:35:33,588 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-09 10:35:33,589 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:33,589 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:33,589 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:33,589 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-09 10:35:33,589 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:33,590 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:33,590 INFO L82 PathProgramCache]: Analyzing trace with hash 956938306, now seen corresponding path program 1 times [2020-10-09 10:35:33,590 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:33,591 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985133253] [2020-10-09 10:35:33,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:33,619 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:33,715 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,715 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985133253] [2020-10-09 10:35:33,716 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:33,716 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:33,716 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [43964938] [2020-10-09 10:35:33,719 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:33,719 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:33,724 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:33,724 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:33,725 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-09 10:35:33,804 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:33,806 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-09 10:35:33,806 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:33,806 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:33,807 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:33,808 INFO L225 Difference]: With dead ends: 80 [2020-10-09 10:35:33,808 INFO L226 Difference]: Without dead ends: 75 [2020-10-09 10:35:33,810 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-09 10:35:33,811 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-09 10:35:33,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-09 10:35:33,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-09 10:35:33,826 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-09 10:35:33,826 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-09 10:35:33,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:33,828 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-09 10:35:33,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:33,828 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-09 10:35:33,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:33,831 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:33,831 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:33,832 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-09 10:35:33,832 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:33,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:33,832 INFO L82 PathProgramCache]: Analyzing trace with hash 507192011, now seen corresponding path program 1 times [2020-10-09 10:35:33,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:33,833 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [949563460] [2020-10-09 10:35:33,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:33,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:33,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:33,957 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [949563460] [2020-10-09 10:35:33,957 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:33,957 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:33,957 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1585280206] [2020-10-09 10:35:33,958 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:33,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:33,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:33,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:33,959 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 5 states. [2020-10-09 10:35:33,984 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:33,984 INFO L93 Difference]: Finished difference Result 73 states and 170 transitions. [2020-10-09 10:35:33,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-09 10:35:33,985 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:33,985 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:33,986 INFO L225 Difference]: With dead ends: 73 [2020-10-09 10:35:33,986 INFO L226 Difference]: Without dead ends: 70 [2020-10-09 10:35:33,987 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:33,988 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2020-10-09 10:35:33,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 64. [2020-10-09 10:35:33,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 64 states. [2020-10-09 10:35:34,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 152 transitions. [2020-10-09 10:35:34,002 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 152 transitions. Word has length 8 [2020-10-09 10:35:34,002 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:34,002 INFO L481 AbstractCegarLoop]: Abstraction has 64 states and 152 transitions. [2020-10-09 10:35:34,002 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:34,002 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 152 transitions. [2020-10-09 10:35:34,003 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-09 10:35:34,003 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:34,003 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:34,003 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-09 10:35:34,004 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:34,004 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:34,004 INFO L82 PathProgramCache]: Analyzing trace with hash 507214331, now seen corresponding path program 2 times [2020-10-09 10:35:34,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:34,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1584795009] [2020-10-09 10:35:34,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:34,025 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:34,119 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,119 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1584795009] [2020-10-09 10:35:34,120 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:34,120 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-09 10:35:34,120 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2035757923] [2020-10-09 10:35:34,120 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-09 10:35:34,121 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:34,121 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-09 10:35:34,121 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-09 10:35:34,122 INFO L87 Difference]: Start difference. First operand 64 states and 152 transitions. Second operand 5 states. [2020-10-09 10:35:34,180 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:34,180 INFO L93 Difference]: Finished difference Result 86 states and 202 transitions. [2020-10-09 10:35:34,180 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:34,181 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-09 10:35:34,181 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:34,182 INFO L225 Difference]: With dead ends: 86 [2020-10-09 10:35:34,182 INFO L226 Difference]: Without dead ends: 80 [2020-10-09 10:35:34,183 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-09 10:35:34,184 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2020-10-09 10:35:34,190 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 66. [2020-10-09 10:35:34,190 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-09 10:35:34,191 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-09 10:35:34,191 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-09 10:35:34,192 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:34,192 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-09 10:35:34,192 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-09 10:35:34,192 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-09 10:35:34,193 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:34,193 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:34,193 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:34,194 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2020-10-09 10:35:34,194 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:34,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:34,194 INFO L82 PathProgramCache]: Analyzing trace with hash -399661872, now seen corresponding path program 2 times [2020-10-09 10:35:34,195 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:34,195 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [109378497] [2020-10-09 10:35:34,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:34,208 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:34,291 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [109378497] [2020-10-09 10:35:34,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [57831783] [2020-10-09 10:35:34,293 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 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 2 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:34,372 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:34,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:34,374 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:34,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:34,444 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:34,469 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,470 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:34,470 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-09 10:35:34,471 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [296042949] [2020-10-09 10:35:34,471 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-09 10:35:34,471 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:34,471 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-09 10:35:34,472 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-09 10:35:34,472 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 10 states. [2020-10-09 10:35:34,543 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:34,543 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-09 10:35:34,544 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:34,544 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 9 [2020-10-09 10:35:34,544 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:34,545 INFO L225 Difference]: With dead ends: 101 [2020-10-09 10:35:34,546 INFO L226 Difference]: Without dead ends: 96 [2020-10-09 10:35:34,546 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:34,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-09 10:35:34,552 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-09 10:35:34,553 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-09 10:35:34,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-09 10:35:34,554 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-09 10:35:34,554 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:34,554 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-09 10:35:34,554 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-09 10:35:34,554 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-09 10:35:34,555 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:34,555 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:34,556 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:34,771 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:34,772 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:34,772 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:34,772 INFO L82 PathProgramCache]: Analyzing trace with hash -1456916488, now seen corresponding path program 3 times [2020-10-09 10:35:34,772 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:34,772 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811785329] [2020-10-09 10:35:34,772 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:34,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:34,839 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811785329] [2020-10-09 10:35:34,840 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482808581] [2020-10-09 10:35:34,840 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 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 3 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:34,896 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:34,896 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:34,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:34,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:34,950 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:34,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:34,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:34,951 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [522694402] [2020-10-09 10:35:34,951 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:34,951 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:34,952 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:34,952 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:34,952 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 9 states. [2020-10-09 10:35:34,982 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:34,982 INFO L93 Difference]: Finished difference Result 84 states and 199 transitions. [2020-10-09 10:35:34,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 10:35:34,982 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:34,983 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:34,983 INFO L225 Difference]: With dead ends: 84 [2020-10-09 10:35:34,984 INFO L226 Difference]: Without dead ends: 81 [2020-10-09 10:35:34,984 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 12 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:34,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 81 states. [2020-10-09 10:35:34,990 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 81 to 74. [2020-10-09 10:35:34,990 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 74 states. [2020-10-09 10:35:34,991 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 179 transitions. [2020-10-09 10:35:34,991 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 179 transitions. Word has length 9 [2020-10-09 10:35:34,991 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:34,992 INFO L481 AbstractCegarLoop]: Abstraction has 74 states and 179 transitions. [2020-10-09 10:35:34,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:34,992 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 179 transitions. [2020-10-09 10:35:34,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:34,993 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:34,993 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:35,208 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:35,209 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:35,210 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:35,210 INFO L82 PathProgramCache]: Analyzing trace with hash -1456224568, now seen corresponding path program 4 times [2020-10-09 10:35:35,210 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:35,211 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [550164329] [2020-10-09 10:35:35,211 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:35,222 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:35,285 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [550164329] [2020-10-09 10:35:35,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080427458] [2020-10-09 10:35:35,286 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 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 4 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:35,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:35,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:35,331 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:35,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:35,392 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,392 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:35,393 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:35,393 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1801375861] [2020-10-09 10:35:35,394 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:35,394 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:35,394 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:35,395 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=47, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:35,395 INFO L87 Difference]: Start difference. First operand 74 states and 179 transitions. Second operand 9 states. [2020-10-09 10:35:35,443 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:35,444 INFO L93 Difference]: Finished difference Result 90 states and 213 transitions. [2020-10-09 10:35:35,444 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:35,444 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:35,444 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:35,445 INFO L225 Difference]: With dead ends: 90 [2020-10-09 10:35:35,445 INFO L226 Difference]: Without dead ends: 87 [2020-10-09 10:35:35,446 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 13 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 8 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=34, Invalid=56, Unknown=0, NotChecked=0, Total=90 [2020-10-09 10:35:35,447 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 87 states. [2020-10-09 10:35:35,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 87 to 76. [2020-10-09 10:35:35,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 76 states. [2020-10-09 10:35:35,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 186 transitions. [2020-10-09 10:35:35,453 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 186 transitions. Word has length 9 [2020-10-09 10:35:35,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:35,453 INFO L481 AbstractCegarLoop]: Abstraction has 76 states and 186 transitions. [2020-10-09 10:35:35,453 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:35,453 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 186 transitions. [2020-10-09 10:35:35,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-09 10:35:35,454 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:35,455 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:35,669 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:35,670 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:35,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:35,671 INFO L82 PathProgramCache]: Analyzing trace with hash -1456202248, now seen corresponding path program 5 times [2020-10-09 10:35:35,671 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:35,671 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1915683151] [2020-10-09 10:35:35,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:35,682 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:35,725 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1915683151] [2020-10-09 10:35:35,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [573591654] [2020-10-09 10:35:35,726 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 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 5 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:35,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:35,776 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:35,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 68 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-09 10:35:35,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:35,836 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:35,848 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:35,848 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:35,848 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-09 10:35:35,848 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [360154141] [2020-10-09 10:35:35,849 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:35,849 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:35,849 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:35,849 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:35,850 INFO L87 Difference]: Start difference. First operand 76 states and 186 transitions. Second operand 9 states. [2020-10-09 10:35:35,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:35,938 INFO L93 Difference]: Finished difference Result 99 states and 237 transitions. [2020-10-09 10:35:35,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:35,939 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 9 [2020-10-09 10:35:35,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:35,940 INFO L225 Difference]: With dead ends: 99 [2020-10-09 10:35:35,940 INFO L226 Difference]: Without dead ends: 93 [2020-10-09 10:35:35,940 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=48, Invalid=84, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:35,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 93 states. [2020-10-09 10:35:35,946 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 93 to 77. [2020-10-09 10:35:35,946 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 77 states. [2020-10-09 10:35:35,946 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 77 states to 77 states and 190 transitions. [2020-10-09 10:35:35,947 INFO L78 Accepts]: Start accepts. Automaton has 77 states and 190 transitions. Word has length 9 [2020-10-09 10:35:35,947 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:35,947 INFO L481 AbstractCegarLoop]: Abstraction has 77 states and 190 transitions. [2020-10-09 10:35:35,947 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:35,947 INFO L276 IsEmpty]: Start isEmpty. Operand 77 states and 190 transitions. [2020-10-09 10:35:35,948 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:35,948 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:35,948 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:36,162 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,163 INFO L82 PathProgramCache]: Analyzing trace with hash 483638869, now seen corresponding path program 1 times [2020-10-09 10:35:36,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1798701016] [2020-10-09 10:35:36,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,174 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,228 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,229 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1798701016] [2020-10-09 10:35:36,229 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:36,229 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:36,230 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1846531124] [2020-10-09 10:35:36,230 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:36,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,231 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:36,231 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:36,231 INFO L87 Difference]: Start difference. First operand 77 states and 190 transitions. Second operand 6 states. [2020-10-09 10:35:36,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:36,257 INFO L93 Difference]: Finished difference Result 92 states and 220 transitions. [2020-10-09 10:35:36,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2020-10-09 10:35:36,258 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:36,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:36,259 INFO L225 Difference]: With dead ends: 92 [2020-10-09 10:35:36,259 INFO L226 Difference]: Without dead ends: 90 [2020-10-09 10:35:36,259 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 4 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 4 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=13, Invalid=17, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:36,260 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 90 states. [2020-10-09 10:35:36,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 90 to 79. [2020-10-09 10:35:36,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-09 10:35:36,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-09 10:35:36,265 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 10 [2020-10-09 10:35:36,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:36,265 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-09 10:35:36,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:36,265 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-09 10:35:36,266 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:36,266 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:36,267 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2020-10-09 10:35:36,267 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,267 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,267 INFO L82 PathProgramCache]: Analyzing trace with hash 484301959, now seen corresponding path program 2 times [2020-10-09 10:35:36,268 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,268 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700189654] [2020-10-09 10:35:36,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,277 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,338 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700189654] [2020-10-09 10:35:36,339 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:36,339 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:36,339 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1171370883] [2020-10-09 10:35:36,339 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:36,340 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,340 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:36,340 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:36,341 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-09 10:35:36,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:36,411 INFO L93 Difference]: Finished difference Result 100 states and 234 transitions. [2020-10-09 10:35:36,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:36,412 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:36,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:36,413 INFO L225 Difference]: With dead ends: 100 [2020-10-09 10:35:36,413 INFO L226 Difference]: Without dead ends: 98 [2020-10-09 10:35:36,413 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 5 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-09 10:35:36,414 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2020-10-09 10:35:36,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 83. [2020-10-09 10:35:36,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 83 states. [2020-10-09 10:35:36,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 83 states to 83 states and 200 transitions. [2020-10-09 10:35:36,419 INFO L78 Accepts]: Start accepts. Automaton has 83 states and 200 transitions. Word has length 10 [2020-10-09 10:35:36,419 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:36,419 INFO L481 AbstractCegarLoop]: Abstraction has 83 states and 200 transitions. [2020-10-09 10:35:36,419 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:36,420 INFO L276 IsEmpty]: Start isEmpty. Operand 83 states and 200 transitions. [2020-10-09 10:35:36,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:36,420 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:36,420 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,421 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2020-10-09 10:35:36,421 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,421 INFO L82 PathProgramCache]: Analyzing trace with hash 484324279, now seen corresponding path program 3 times [2020-10-09 10:35:36,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725373862] [2020-10-09 10:35:36,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,478 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,478 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725373862] [2020-10-09 10:35:36,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:36,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:36,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1418510925] [2020-10-09 10:35:36,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:36,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:36,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:36,481 INFO L87 Difference]: Start difference. First operand 83 states and 200 transitions. Second operand 6 states. [2020-10-09 10:35:36,561 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:36,561 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-09 10:35:36,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:36,562 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:36,562 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:36,563 INFO L225 Difference]: With dead ends: 105 [2020-10-09 10:35:36,563 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 10:35:36,564 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 5 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:36,564 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 10:35:36,567 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-09 10:35:36,567 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 10:35:36,568 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 198 transitions. [2020-10-09 10:35:36,568 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 198 transitions. Word has length 10 [2020-10-09 10:35:36,568 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:36,569 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 198 transitions. [2020-10-09 10:35:36,569 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:36,569 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 198 transitions. [2020-10-09 10:35:36,569 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:36,570 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:36,570 INFO L421 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,570 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2020-10-09 10:35:36,570 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,570 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,570 INFO L82 PathProgramCache]: Analyzing trace with hash 484353109, now seen corresponding path program 4 times [2020-10-09 10:35:36,571 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,571 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1633748850] [2020-10-09 10:35:36,571 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,580 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,624 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,625 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1633748850] [2020-10-09 10:35:36,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-09 10:35:36,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-09 10:35:36,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1375300274] [2020-10-09 10:35:36,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-09 10:35:36,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-09 10:35:36,627 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-09 10:35:36,627 INFO L87 Difference]: Start difference. First operand 82 states and 198 transitions. Second operand 6 states. [2020-10-09 10:35:36,701 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:36,702 INFO L93 Difference]: Finished difference Result 105 states and 246 transitions. [2020-10-09 10:35:36,702 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:36,702 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-09 10:35:36,702 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:36,703 INFO L225 Difference]: With dead ends: 105 [2020-10-09 10:35:36,703 INFO L226 Difference]: Without dead ends: 100 [2020-10-09 10:35:36,704 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:36,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2020-10-09 10:35:36,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 82. [2020-10-09 10:35:36,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-09 10:35:36,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-09 10:35:36,709 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-09 10:35:36,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:36,709 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-09 10:35:36,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-09 10:35:36,710 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-09 10:35:36,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:36,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:36,710 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:36,711 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2020-10-09 10:35:36,711 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:36,711 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:36,711 INFO L82 PathProgramCache]: Analyzing trace with hash 495405570, now seen corresponding path program 3 times [2020-10-09 10:35:36,712 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:36,712 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616385907] [2020-10-09 10:35:36,712 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:36,720 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:36,777 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,777 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616385907] [2020-10-09 10:35:36,778 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [331962389] [2020-10-09 10:35:36,778 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 6 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:36,825 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:36,826 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:36,826 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:36,827 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:36,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:36,905 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:36,906 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:36,906 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-09 10:35:36,906 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192231570] [2020-10-09 10:35:36,906 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-09 10:35:36,907 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:36,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-09 10:35:36,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:36,907 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 12 states. [2020-10-09 10:35:36,994 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:36,994 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-09 10:35:36,995 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:36,995 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 10 [2020-10-09 10:35:36,995 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:36,996 INFO L225 Difference]: With dead ends: 122 [2020-10-09 10:35:36,996 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 10:35:36,996 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:36,997 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 10:35:36,999 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-09 10:35:37,000 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-09 10:35:37,000 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-09 10:35:37,000 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-09 10:35:37,001 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:37,001 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-09 10:35:37,001 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-09 10:35:37,001 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-09 10:35:37,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:37,002 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:37,002 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:37,213 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-09 10:35:37,214 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:37,214 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:37,214 INFO L82 PathProgramCache]: Analyzing trace with hash 2080229483, now seen corresponding path program 6 times [2020-10-09 10:35:37,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:37,214 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1277989328] [2020-10-09 10:35:37,214 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:37,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:37,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1277989328] [2020-10-09 10:35:37,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229441020] [2020-10-09 10:35:37,292 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 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:37,341 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:37,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:37,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:37,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:37,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,421 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:37,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:37,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1285649065] [2020-10-09 10:35:37,422 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:37,423 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:37,423 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:37,423 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:37,423 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 11 states. [2020-10-09 10:35:37,454 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:37,455 INFO L93 Difference]: Finished difference Result 108 states and 255 transitions. [2020-10-09 10:35:37,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:37,455 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:37,455 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:37,456 INFO L225 Difference]: With dead ends: 108 [2020-10-09 10:35:37,456 INFO L226 Difference]: Without dead ends: 105 [2020-10-09 10:35:37,457 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 14 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:37,457 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 105 states. [2020-10-09 10:35:37,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 105 to 91. [2020-10-09 10:35:37,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 91 states. [2020-10-09 10:35:37,461 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 91 states to 91 states and 221 transitions. [2020-10-09 10:35:37,461 INFO L78 Accepts]: Start accepts. Automaton has 91 states and 221 transitions. Word has length 10 [2020-10-09 10:35:37,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:37,461 INFO L481 AbstractCegarLoop]: Abstraction has 91 states and 221 transitions. [2020-10-09 10:35:37,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:37,461 INFO L276 IsEmpty]: Start isEmpty. Operand 91 states and 221 transitions. [2020-10-09 10:35:37,462 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:37,462 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:37,462 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:37,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:37,673 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:37,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:37,673 INFO L82 PathProgramCache]: Analyzing trace with hash 2101679003, now seen corresponding path program 7 times [2020-10-09 10:35:37,673 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:37,673 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1887638940] [2020-10-09 10:35:37,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:37,681 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:37,749 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1887638940] [2020-10-09 10:35:37,750 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [841503660] [2020-10-09 10:35:37,750 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:37,795 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:37,796 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:37,797 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:37,877 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:37,878 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:37,878 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:37,878 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006513868] [2020-10-09 10:35:37,878 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:37,878 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:37,879 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:37,879 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:37,879 INFO L87 Difference]: Start difference. First operand 91 states and 221 transitions. Second operand 11 states. [2020-10-09 10:35:37,940 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:37,941 INFO L93 Difference]: Finished difference Result 116 states and 270 transitions. [2020-10-09 10:35:37,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:37,941 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:37,942 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:37,943 INFO L225 Difference]: With dead ends: 116 [2020-10-09 10:35:37,943 INFO L226 Difference]: Without dead ends: 113 [2020-10-09 10:35:37,943 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:37,944 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 113 states. [2020-10-09 10:35:37,947 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 113 to 92. [2020-10-09 10:35:37,947 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 92 states. [2020-10-09 10:35:37,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 223 transitions. [2020-10-09 10:35:37,948 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 223 transitions. Word has length 10 [2020-10-09 10:35:37,948 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:37,949 INFO L481 AbstractCegarLoop]: Abstraction has 92 states and 223 transitions. [2020-10-09 10:35:37,949 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:37,949 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 223 transitions. [2020-10-09 10:35:37,949 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:37,950 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:37,950 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:38,161 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-09 10:35:38,162 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:38,162 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:38,163 INFO L82 PathProgramCache]: Analyzing trace with hash 2102370923, now seen corresponding path program 8 times [2020-10-09 10:35:38,163 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:38,164 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825024230] [2020-10-09 10:35:38,164 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:38,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:38,253 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,253 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825024230] [2020-10-09 10:35:38,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [662006609] [2020-10-09 10:35:38,257 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 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:38,332 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:38,332 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:38,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:38,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:38,434 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,434 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:38,434 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:38,434 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130463219] [2020-10-09 10:35:38,435 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:38,435 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:38,435 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:38,436 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:38,436 INFO L87 Difference]: Start difference. First operand 92 states and 223 transitions. Second operand 11 states. [2020-10-09 10:35:38,536 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:38,536 INFO L93 Difference]: Finished difference Result 115 states and 270 transitions. [2020-10-09 10:35:38,537 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:38,537 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:38,537 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:38,539 INFO L225 Difference]: With dead ends: 115 [2020-10-09 10:35:38,539 INFO L226 Difference]: Without dead ends: 112 [2020-10-09 10:35:38,540 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:38,540 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2020-10-09 10:35:38,543 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 94. [2020-10-09 10:35:38,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 10:35:38,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 230 transitions. [2020-10-09 10:35:38,544 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 230 transitions. Word has length 10 [2020-10-09 10:35:38,544 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:38,545 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 230 transitions. [2020-10-09 10:35:38,545 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:38,545 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 230 transitions. [2020-10-09 10:35:38,545 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-09 10:35:38,545 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:38,546 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:38,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-09 10:35:38,756 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:38,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:38,756 INFO L82 PathProgramCache]: Analyzing trace with hash 2102393243, now seen corresponding path program 9 times [2020-10-09 10:35:38,756 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:38,756 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [515222116] [2020-10-09 10:35:38,756 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:38,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:38,809 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [515222116] [2020-10-09 10:35:38,810 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [84005497] [2020-10-09 10:35:38,810 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 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:38,865 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:38,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:38,866 INFO L263 TraceCheckSpWp]: Trace formula consists of 73 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:38,867 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:38,930 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:38,940 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:38,940 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:38,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:38,941 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029278509] [2020-10-09 10:35:38,941 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:38,941 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:38,942 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:38,942 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=35, Invalid=75, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:38,942 INFO L87 Difference]: Start difference. First operand 94 states and 230 transitions. Second operand 11 states. [2020-10-09 10:35:39,040 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:39,040 INFO L93 Difference]: Finished difference Result 124 states and 294 transitions. [2020-10-09 10:35:39,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:39,041 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 10 [2020-10-09 10:35:39,041 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:39,042 INFO L225 Difference]: With dead ends: 124 [2020-10-09 10:35:39,042 INFO L226 Difference]: Without dead ends: 118 [2020-10-09 10:35:39,043 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=73, Invalid=137, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:39,043 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-09 10:35:39,046 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 94. [2020-10-09 10:35:39,046 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-09 10:35:39,046 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-09 10:35:39,047 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-09 10:35:39,047 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:39,047 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-09 10:35:39,047 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:39,047 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-09 10:35:39,047 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:39,048 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:39,048 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:39,259 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 10 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-09 10:35:39,260 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:39,260 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:39,260 INFO L82 PathProgramCache]: Analyzing trace with hash 2107902445, now seen corresponding path program 5 times [2020-10-09 10:35:39,260 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:39,261 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [632516524] [2020-10-09 10:35:39,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:39,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:39,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [632516524] [2020-10-09 10:35:39,321 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1320935838] [2020-10-09 10:35:39,321 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 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:39,384 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:39,384 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:39,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:39,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,461 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:39,461 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:39,461 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1342956553] [2020-10-09 10:35:39,461 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:39,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:39,462 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:39,462 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:39,463 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 11 states. [2020-10-09 10:35:39,507 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:39,507 INFO L93 Difference]: Finished difference Result 113 states and 270 transitions. [2020-10-09 10:35:39,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-09 10:35:39,508 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:39,508 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:39,509 INFO L225 Difference]: With dead ends: 113 [2020-10-09 10:35:39,509 INFO L226 Difference]: Without dead ends: 111 [2020-10-09 10:35:39,510 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 15 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:39,510 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 111 states. [2020-10-09 10:35:39,512 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 111 to 96. [2020-10-09 10:35:39,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 96 states. [2020-10-09 10:35:39,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 238 transitions. [2020-10-09 10:35:39,513 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 238 transitions. Word has length 11 [2020-10-09 10:35:39,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:39,514 INFO L481 AbstractCegarLoop]: Abstraction has 96 states and 238 transitions. [2020-10-09 10:35:39,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:39,514 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 238 transitions. [2020-10-09 10:35:39,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:39,515 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:39,515 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:39,724 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-09 10:35:39,725 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:39,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:39,726 INFO L82 PathProgramCache]: Analyzing trace with hash 2107903406, now seen corresponding path program 6 times [2020-10-09 10:35:39,726 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:39,726 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [820717620] [2020-10-09 10:35:39,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:39,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:39,787 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,787 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [820717620] [2020-10-09 10:35:39,788 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [169918722] [2020-10-09 10:35:39,788 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 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 12 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:39,844 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:39,844 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:39,845 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:39,846 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:39,910 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:39,911 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:39,911 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:39,911 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468869289] [2020-10-09 10:35:39,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:39,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:39,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:39,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:39,912 INFO L87 Difference]: Start difference. First operand 96 states and 238 transitions. Second operand 11 states. [2020-10-09 10:35:39,981 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:39,981 INFO L93 Difference]: Finished difference Result 118 states and 280 transitions. [2020-10-09 10:35:39,982 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:39,982 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:39,982 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:39,983 INFO L225 Difference]: With dead ends: 118 [2020-10-09 10:35:39,984 INFO L226 Difference]: Without dead ends: 116 [2020-10-09 10:35:39,984 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:39,985 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-09 10:35:39,988 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 97. [2020-10-09 10:35:39,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-09 10:35:39,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 239 transitions. [2020-10-09 10:35:39,990 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 239 transitions. Word has length 11 [2020-10-09 10:35:39,990 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:39,990 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 239 transitions. [2020-10-09 10:35:39,990 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:39,990 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 239 transitions. [2020-10-09 10:35:39,991 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:39,991 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:39,991 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:40,204 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,12 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:40,204 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:40,205 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:40,205 INFO L82 PathProgramCache]: Analyzing trace with hash 2107932236, now seen corresponding path program 7 times [2020-10-09 10:35:40,205 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:40,205 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [580250392] [2020-10-09 10:35:40,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:40,212 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:40,269 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [580250392] [2020-10-09 10:35:40,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1567151628] [2020-10-09 10:35:40,270 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 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:40,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:40,313 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:40,314 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:40,384 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,384 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:40,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:40,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [414512223] [2020-10-09 10:35:40,385 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:40,385 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:40,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:40,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:40,386 INFO L87 Difference]: Start difference. First operand 97 states and 239 transitions. Second operand 11 states. [2020-10-09 10:35:40,465 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:40,466 INFO L93 Difference]: Finished difference Result 119 states and 282 transitions. [2020-10-09 10:35:40,466 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:40,467 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:40,467 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:40,468 INFO L225 Difference]: With dead ends: 119 [2020-10-09 10:35:40,468 INFO L226 Difference]: Without dead ends: 117 [2020-10-09 10:35:40,469 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=56, Invalid=100, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:40,469 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-09 10:35:40,472 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 98. [2020-10-09 10:35:40,472 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 10:35:40,473 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 241 transitions. [2020-10-09 10:35:40,473 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 241 transitions. Word has length 11 [2020-10-09 10:35:40,473 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:40,474 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 241 transitions. [2020-10-09 10:35:40,474 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:40,474 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 241 transitions. [2020-10-09 10:35:40,474 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:40,475 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:40,475 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:40,687 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,13 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:40,688 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:40,688 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:40,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2128458235, now seen corresponding path program 8 times [2020-10-09 10:35:40,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:40,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1306272150] [2020-10-09 10:35:40,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:40,698 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:40,769 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,769 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1306272150] [2020-10-09 10:35:40,770 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004242861] [2020-10-09 10:35:40,770 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 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 14 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:40,822 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:40,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:40,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:40,829 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:40,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:40,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:40,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:40,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2137760320] [2020-10-09 10:35:40,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:40,905 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:40,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:40,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:40,906 INFO L87 Difference]: Start difference. First operand 98 states and 241 transitions. Second operand 11 states. [2020-10-09 10:35:40,965 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:40,966 INFO L93 Difference]: Finished difference Result 122 states and 288 transitions. [2020-10-09 10:35:40,967 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:40,967 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:40,967 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:40,968 INFO L225 Difference]: With dead ends: 122 [2020-10-09 10:35:40,968 INFO L226 Difference]: Without dead ends: 120 [2020-10-09 10:35:40,968 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 27 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=45, Invalid=87, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:40,969 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 120 states. [2020-10-09 10:35:40,971 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 120 to 100. [2020-10-09 10:35:40,972 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 100 states. [2020-10-09 10:35:40,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 247 transitions. [2020-10-09 10:35:40,972 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 247 transitions. Word has length 11 [2020-10-09 10:35:40,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:40,974 INFO L481 AbstractCegarLoop]: Abstraction has 100 states and 247 transitions. [2020-10-09 10:35:40,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:40,974 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 247 transitions. [2020-10-09 10:35:40,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:40,975 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:40,975 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:41,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable20 [2020-10-09 10:35:41,176 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:41,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:41,177 INFO L82 PathProgramCache]: Analyzing trace with hash 2128459196, now seen corresponding path program 9 times [2020-10-09 10:35:41,177 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:41,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1407534032] [2020-10-09 10:35:41,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:41,184 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:41,233 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1407534032] [2020-10-09 10:35:41,234 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [616706939] [2020-10-09 10:35:41,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 15 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:41,277 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:41,277 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:41,278 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:41,279 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:41,337 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,337 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:41,337 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:41,337 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [807659774] [2020-10-09 10:35:41,338 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:41,338 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:41,338 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:41,338 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:41,338 INFO L87 Difference]: Start difference. First operand 100 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:41,420 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:41,420 INFO L93 Difference]: Finished difference Result 123 states and 290 transitions. [2020-10-09 10:35:41,421 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:41,421 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:41,421 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:41,422 INFO L225 Difference]: With dead ends: 123 [2020-10-09 10:35:41,422 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 10:35:41,423 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:41,423 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 10:35:41,426 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 99. [2020-10-09 10:35:41,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:41,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 243 transitions. [2020-10-09 10:35:41,427 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 243 transitions. Word has length 11 [2020-10-09 10:35:41,427 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:41,427 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 243 transitions. [2020-10-09 10:35:41,427 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:41,427 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 243 transitions. [2020-10-09 10:35:41,428 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:41,428 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:41,428 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:41,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:41,640 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:41,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:41,640 INFO L82 PathProgramCache]: Analyzing trace with hash 2129121325, now seen corresponding path program 10 times [2020-10-09 10:35:41,640 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:41,641 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194597898] [2020-10-09 10:35:41,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:41,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:41,697 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194597898] [2020-10-09 10:35:41,698 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1111667277] [2020-10-09 10:35:41,698 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 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 16 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:41,737 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:41,737 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:41,738 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:41,739 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:41,816 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:41,817 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:41,817 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:41,817 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1340717937] [2020-10-09 10:35:41,817 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:41,818 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:41,818 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:41,818 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=76, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:41,818 INFO L87 Difference]: Start difference. First operand 99 states and 243 transitions. Second operand 11 states. [2020-10-09 10:35:41,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:41,889 INFO L93 Difference]: Finished difference Result 123 states and 287 transitions. [2020-10-09 10:35:41,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:41,890 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:41,890 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:41,891 INFO L225 Difference]: With dead ends: 123 [2020-10-09 10:35:41,891 INFO L226 Difference]: Without dead ends: 121 [2020-10-09 10:35:41,891 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 26 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=55, Invalid=101, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:41,892 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-09 10:35:41,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 103. [2020-10-09 10:35:41,895 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 103 states. [2020-10-09 10:35:41,895 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 103 states to 103 states and 249 transitions. [2020-10-09 10:35:41,896 INFO L78 Accepts]: Start accepts. Automaton has 103 states and 249 transitions. Word has length 11 [2020-10-09 10:35:41,896 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:41,896 INFO L481 AbstractCegarLoop]: Abstraction has 103 states and 249 transitions. [2020-10-09 10:35:41,896 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:41,896 INFO L276 IsEmpty]: Start isEmpty. Operand 103 states and 249 transitions. [2020-10-09 10:35:41,897 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:41,897 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:41,897 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:42,107 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 16 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-09 10:35:42,107 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:42,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:42,108 INFO L82 PathProgramCache]: Analyzing trace with hash 2129143645, now seen corresponding path program 11 times [2020-10-09 10:35:42,108 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:42,109 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [683910543] [2020-10-09 10:35:42,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:42,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:42,169 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [683910543] [2020-10-09 10:35:42,169 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [600188153] [2020-10-09 10:35:42,170 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 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 17 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:42,224 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:42,224 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:42,225 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:42,226 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:42,290 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:42,331 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,331 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:42,331 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:42,331 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1920284829] [2020-10-09 10:35:42,332 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:42,332 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:42,332 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:42,332 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:42,332 INFO L87 Difference]: Start difference. First operand 103 states and 249 transitions. Second operand 11 states. [2020-10-09 10:35:42,487 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:42,487 INFO L93 Difference]: Finished difference Result 133 states and 314 transitions. [2020-10-09 10:35:42,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:42,488 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:42,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:42,489 INFO L225 Difference]: With dead ends: 133 [2020-10-09 10:35:42,489 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 10:35:42,490 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:42,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 10:35:42,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 102. [2020-10-09 10:35:42,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 102 states. [2020-10-09 10:35:42,494 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 247 transitions. [2020-10-09 10:35:42,494 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 247 transitions. Word has length 11 [2020-10-09 10:35:42,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:42,494 INFO L481 AbstractCegarLoop]: Abstraction has 102 states and 247 transitions. [2020-10-09 10:35:42,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:42,494 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 247 transitions. [2020-10-09 10:35:42,495 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:42,495 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:42,495 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:42,705 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:42,705 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:42,706 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:42,706 INFO L82 PathProgramCache]: Analyzing trace with hash 2129151116, now seen corresponding path program 12 times [2020-10-09 10:35:42,706 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:42,707 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [805919691] [2020-10-09 10:35:42,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:42,713 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:42,760 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [805919691] [2020-10-09 10:35:42,761 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [322341581] [2020-10-09 10:35:42,762 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 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 18 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:42,832 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:42,832 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:42,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:42,835 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:42,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:42,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:42,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:42,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [335946221] [2020-10-09 10:35:42,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:42,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:42,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:42,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:42,905 INFO L87 Difference]: Start difference. First operand 102 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:43,007 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:43,008 INFO L93 Difference]: Finished difference Result 127 states and 298 transitions. [2020-10-09 10:35:43,008 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:43,008 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:43,008 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:43,009 INFO L225 Difference]: With dead ends: 127 [2020-10-09 10:35:43,010 INFO L226 Difference]: Without dead ends: 125 [2020-10-09 10:35:43,010 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 33 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:43,011 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 125 states. [2020-10-09 10:35:43,013 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 125 to 104. [2020-10-09 10:35:43,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 10:35:43,014 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-09 10:35:43,014 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-09 10:35:43,014 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:43,015 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-09 10:35:43,015 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:43,015 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-09 10:35:43,015 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:43,016 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:43,016 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:43,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-09 10:35:43,226 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:43,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:43,227 INFO L82 PathProgramCache]: Analyzing trace with hash 2129172475, now seen corresponding path program 13 times [2020-10-09 10:35:43,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:43,227 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1297118840] [2020-10-09 10:35:43,227 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:43,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:43,278 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1297118840] [2020-10-09 10:35:43,279 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1903080742] [2020-10-09 10:35:43,279 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 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 19 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:43,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:43,335 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:43,336 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:43,388 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:43,403 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:43,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:43,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [846564599] [2020-10-09 10:35:43,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:43,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:43,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:43,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:43,404 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-09 10:35:43,630 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:43,630 INFO L93 Difference]: Finished difference Result 141 states and 334 transitions. [2020-10-09 10:35:43,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:35:43,631 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:43,631 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:43,632 INFO L225 Difference]: With dead ends: 141 [2020-10-09 10:35:43,632 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 10:35:43,632 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 58 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:35:43,633 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 10:35:43,636 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 104. [2020-10-09 10:35:43,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 104 states. [2020-10-09 10:35:43,637 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 254 transitions. [2020-10-09 10:35:43,637 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 254 transitions. Word has length 11 [2020-10-09 10:35:43,637 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:43,637 INFO L481 AbstractCegarLoop]: Abstraction has 104 states and 254 transitions. [2020-10-09 10:35:43,637 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:43,637 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 254 transitions. [2020-10-09 10:35:43,638 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:43,638 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:43,638 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:43,850 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-09 10:35:43,851 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:43,851 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:43,851 INFO L82 PathProgramCache]: Analyzing trace with hash 2129173436, now seen corresponding path program 14 times [2020-10-09 10:35:43,852 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:43,852 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [624246079] [2020-10-09 10:35:43,852 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:43,865 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:43,931 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:43,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [624246079] [2020-10-09 10:35:43,932 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [994236601] [2020-10-09 10:35:43,932 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 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 20 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:43,985 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:43,985 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:43,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:43,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:44,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:44,044 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,044 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:44,045 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:44,045 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [749103921] [2020-10-09 10:35:44,045 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:44,045 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:44,046 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:44,046 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:44,046 INFO L87 Difference]: Start difference. First operand 104 states and 254 transitions. Second operand 11 states. [2020-10-09 10:35:44,199 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:44,199 INFO L93 Difference]: Finished difference Result 136 states and 319 transitions. [2020-10-09 10:35:44,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:44,200 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:44,200 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:44,201 INFO L225 Difference]: With dead ends: 136 [2020-10-09 10:35:44,201 INFO L226 Difference]: Without dead ends: 131 [2020-10-09 10:35:44,201 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:44,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 131 states. [2020-10-09 10:35:44,207 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 131 to 101. [2020-10-09 10:35:44,207 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:44,208 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 245 transitions. [2020-10-09 10:35:44,208 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 245 transitions. Word has length 11 [2020-10-09 10:35:44,208 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:44,208 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 245 transitions. [2020-10-09 10:35:44,208 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:44,208 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 245 transitions. [2020-10-09 10:35:44,209 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:44,209 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:44,209 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:44,420 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2020-10-09 10:35:44,420 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:44,421 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:44,421 INFO L82 PathProgramCache]: Analyzing trace with hash 2129381756, now seen corresponding path program 15 times [2020-10-09 10:35:44,421 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:44,422 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1132846157] [2020-10-09 10:35:44,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:44,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1132846157] [2020-10-09 10:35:44,485 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176621729] [2020-10-09 10:35:44,485 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 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 21 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:44,558 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:44,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:44,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:44,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:44,635 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:44,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:44,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:44,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [418770128] [2020-10-09 10:35:44,636 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:44,636 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:44,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:44,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:44,637 INFO L87 Difference]: Start difference. First operand 101 states and 245 transitions. Second operand 11 states. [2020-10-09 10:35:44,763 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:44,763 INFO L93 Difference]: Finished difference Result 130 states and 301 transitions. [2020-10-09 10:35:44,764 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:44,764 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:44,764 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:44,766 INFO L225 Difference]: With dead ends: 130 [2020-10-09 10:35:44,766 INFO L226 Difference]: Without dead ends: 128 [2020-10-09 10:35:44,766 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=63, Invalid=119, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:44,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2020-10-09 10:35:44,771 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 99. [2020-10-09 10:35:44,771 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:44,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-09 10:35:44,772 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-09 10:35:44,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:44,773 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-09 10:35:44,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:44,773 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-09 10:35:44,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:44,774 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:44,774 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:44,986 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-09 10:35:44,986 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:44,987 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:44,987 INFO L82 PathProgramCache]: Analyzing trace with hash 2130044846, now seen corresponding path program 16 times [2020-10-09 10:35:44,987 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:44,987 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1573469722] [2020-10-09 10:35:44,987 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:44,993 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:45,039 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1573469722] [2020-10-09 10:35:45,039 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1231080131] [2020-10-09 10:35:45,039 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 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 22 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:45,079 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:45,079 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:45,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:45,085 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:45,148 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,148 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:45,148 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:45,148 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1559036394] [2020-10-09 10:35:45,149 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:45,149 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:45,149 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:45,149 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=33, Invalid=77, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:45,150 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-09 10:35:45,291 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:45,291 INFO L93 Difference]: Finished difference Result 131 states and 303 transitions. [2020-10-09 10:35:45,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:45,292 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:45,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:45,293 INFO L225 Difference]: With dead ends: 131 [2020-10-09 10:35:45,293 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 10:35:45,293 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=79, Invalid=161, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:45,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 10:35:45,298 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 101. [2020-10-09 10:35:45,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:45,299 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-09 10:35:45,299 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-09 10:35:45,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:45,299 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-09 10:35:45,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:45,299 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-09 10:35:45,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:45,300 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:45,300 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:45,508 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-09 10:35:45,508 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:45,509 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:45,509 INFO L82 PathProgramCache]: Analyzing trace with hash 2130066205, now seen corresponding path program 17 times [2020-10-09 10:35:45,509 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:45,510 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1926733357] [2020-10-09 10:35:45,510 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:45,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:45,570 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1926733357] [2020-10-09 10:35:45,571 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1526487104] [2020-10-09 10:35:45,571 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 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 23 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:45,613 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:45,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:45,613 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:45,614 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:45,662 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:45,673 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:45,673 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:45,673 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:45,673 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1157859550] [2020-10-09 10:35:45,674 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:45,674 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:45,674 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:45,674 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:45,674 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:45,799 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:45,800 INFO L93 Difference]: Finished difference Result 131 states and 311 transitions. [2020-10-09 10:35:45,801 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:45,801 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:45,801 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:45,802 INFO L225 Difference]: With dead ends: 131 [2020-10-09 10:35:45,803 INFO L226 Difference]: Without dead ends: 126 [2020-10-09 10:35:45,804 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:45,805 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 126 states. [2020-10-09 10:35:45,807 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 126 to 101. [2020-10-09 10:35:45,807 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 101 states. [2020-10-09 10:35:45,808 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 101 states to 101 states and 247 transitions. [2020-10-09 10:35:45,808 INFO L78 Accepts]: Start accepts. Automaton has 101 states and 247 transitions. Word has length 11 [2020-10-09 10:35:45,808 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:45,808 INFO L481 AbstractCegarLoop]: Abstraction has 101 states and 247 transitions. [2020-10-09 10:35:45,808 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:45,809 INFO L276 IsEmpty]: Start isEmpty. Operand 101 states and 247 transitions. [2020-10-09 10:35:45,809 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:45,809 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:45,809 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:46,021 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:46,022 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:46,022 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:46,022 INFO L82 PathProgramCache]: Analyzing trace with hash 2130067166, now seen corresponding path program 18 times [2020-10-09 10:35:46,023 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:46,023 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882406414] [2020-10-09 10:35:46,024 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:46,030 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:46,071 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882406414] [2020-10-09 10:35:46,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161623688] [2020-10-09 10:35:46,072 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 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 24 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:46,111 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:46,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:46,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:46,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:46,157 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:46,164 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:46,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:46,165 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332239742] [2020-10-09 10:35:46,165 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:46,165 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:46,166 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:46,166 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:46,166 INFO L87 Difference]: Start difference. First operand 101 states and 247 transitions. Second operand 11 states. [2020-10-09 10:35:46,388 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:46,389 INFO L93 Difference]: Finished difference Result 145 states and 339 transitions. [2020-10-09 10:35:46,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:35:46,389 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:46,389 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:46,390 INFO L225 Difference]: With dead ends: 145 [2020-10-09 10:35:46,390 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 10:35:46,391 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=249, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:35:46,391 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 10:35:46,395 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 99. [2020-10-09 10:35:46,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 99 states. [2020-10-09 10:35:46,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 99 states to 99 states and 240 transitions. [2020-10-09 10:35:46,396 INFO L78 Accepts]: Start accepts. Automaton has 99 states and 240 transitions. Word has length 11 [2020-10-09 10:35:46,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:46,397 INFO L481 AbstractCegarLoop]: Abstraction has 99 states and 240 transitions. [2020-10-09 10:35:46,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:46,397 INFO L276 IsEmpty]: Start isEmpty. Operand 99 states and 240 transitions. [2020-10-09 10:35:46,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:46,397 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:46,398 INFO L421 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:46,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2020-10-09 10:35:46,598 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:46,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:46,599 INFO L82 PathProgramCache]: Analyzing trace with hash 2130095996, now seen corresponding path program 19 times [2020-10-09 10:35:46,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:46,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1914877589] [2020-10-09 10:35:46,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:46,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:46,644 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1914877589] [2020-10-09 10:35:46,644 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [617123330] [2020-10-09 10:35:46,644 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 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 25 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:46,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:46,680 INFO L263 TraceCheckSpWp]: Trace formula consists of 79 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-09 10:35:46,680 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:46,742 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:46,749 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:46,750 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:46,750 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-09 10:35:46,750 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1918016540] [2020-10-09 10:35:46,750 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:35:46,750 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:46,751 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:35:46,751 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:35:46,751 INFO L87 Difference]: Start difference. First operand 99 states and 240 transitions. Second operand 11 states. [2020-10-09 10:35:46,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:46,921 INFO L93 Difference]: Finished difference Result 135 states and 315 transitions. [2020-10-09 10:35:46,921 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:46,921 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 11 [2020-10-09 10:35:46,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:46,923 INFO L225 Difference]: With dead ends: 135 [2020-10-09 10:35:46,923 INFO L226 Difference]: Without dead ends: 130 [2020-10-09 10:35:46,924 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=176, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:46,924 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 130 states. [2020-10-09 10:35:46,926 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 130 to 98. [2020-10-09 10:35:46,927 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-09 10:35:46,927 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-09 10:35:46,927 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-09 10:35:46,927 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:46,928 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-09 10:35:46,928 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:35:46,928 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-09 10:35:46,928 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:46,928 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:46,928 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:47,139 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,25 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:47,140 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:47,140 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:47,140 INFO L82 PathProgramCache]: Analyzing trace with hash -1822274800, now seen corresponding path program 4 times [2020-10-09 10:35:47,140 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:47,141 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1952711882] [2020-10-09 10:35:47,141 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:47,147 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:47,201 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1952711882] [2020-10-09 10:35:47,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4406030] [2020-10-09 10:35:47,201 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 26 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:47,238 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:47,238 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:47,239 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:47,239 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:47,326 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:47,348 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:47,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-09 10:35:47,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1338645933] [2020-10-09 10:35:47,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-09 10:35:47,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:47,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-09 10:35:47,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:47,350 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 14 states. [2020-10-09 10:35:47,463 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:47,464 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-09 10:35:47,464 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:47,464 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 11 [2020-10-09 10:35:47,464 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:47,466 INFO L225 Difference]: With dead ends: 143 [2020-10-09 10:35:47,466 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 10:35:47,466 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:35:47,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 10:35:47,470 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-09 10:35:47,470 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-09 10:35:47,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-09 10:35:47,470 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-09 10:35:47,471 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:47,471 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-09 10:35:47,471 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-09 10:35:47,471 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-09 10:35:47,471 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:47,472 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:47,472 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:47,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 26 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable32 [2020-10-09 10:35:47,681 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:47,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:47,682 INFO L82 PathProgramCache]: Analyzing trace with hash 62604888, now seen corresponding path program 10 times [2020-10-09 10:35:47,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:47,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1575947237] [2020-10-09 10:35:47,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:47,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:47,766 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1575947237] [2020-10-09 10:35:47,766 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [809246578] [2020-10-09 10:35:47,766 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 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:47,806 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:47,807 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:47,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:47,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:47,895 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:47,895 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:47,895 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:47,896 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2014656075] [2020-10-09 10:35:47,896 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:47,896 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:47,896 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:47,897 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:47,897 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 13 states. [2020-10-09 10:35:47,938 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:47,939 INFO L93 Difference]: Finished difference Result 132 states and 311 transitions. [2020-10-09 10:35:47,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:47,939 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:47,939 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:47,940 INFO L225 Difference]: With dead ends: 132 [2020-10-09 10:35:47,940 INFO L226 Difference]: Without dead ends: 129 [2020-10-09 10:35:47,941 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:47,941 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 129 states. [2020-10-09 10:35:47,945 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 129 to 110. [2020-10-09 10:35:47,945 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 10:35:47,945 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-09 10:35:47,945 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-09 10:35:47,946 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:47,946 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-09 10:35:47,946 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:47,946 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-09 10:35:47,946 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:47,946 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:47,947 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:48,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 27 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-09 10:35:48,156 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:48,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:48,157 INFO L82 PathProgramCache]: Analyzing trace with hash 727540008, now seen corresponding path program 11 times [2020-10-09 10:35:48,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:48,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [704721506] [2020-10-09 10:35:48,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:48,163 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:48,236 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [704721506] [2020-10-09 10:35:48,237 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [174672445] [2020-10-09 10:35:48,237 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 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 28 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:48,271 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:35:48,272 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:48,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:48,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:48,367 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:48,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:48,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1369676075] [2020-10-09 10:35:48,368 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:48,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:48,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:48,369 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:48,369 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-09 10:35:48,432 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:48,432 INFO L93 Difference]: Finished difference Result 143 states and 332 transitions. [2020-10-09 10:35:48,433 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:48,433 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:48,433 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:48,434 INFO L225 Difference]: With dead ends: 143 [2020-10-09 10:35:48,434 INFO L226 Difference]: Without dead ends: 140 [2020-10-09 10:35:48,435 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:48,436 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 140 states. [2020-10-09 10:35:48,439 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 140 to 110. [2020-10-09 10:35:48,439 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 110 states. [2020-10-09 10:35:48,440 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 110 states to 110 states and 268 transitions. [2020-10-09 10:35:48,440 INFO L78 Accepts]: Start accepts. Automaton has 110 states and 268 transitions. Word has length 11 [2020-10-09 10:35:48,440 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:48,440 INFO L481 AbstractCegarLoop]: Abstraction has 110 states and 268 transitions. [2020-10-09 10:35:48,440 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:48,440 INFO L276 IsEmpty]: Start isEmpty. Operand 110 states and 268 transitions. [2020-10-09 10:35:48,443 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:48,443 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:48,443 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:48,656 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2020-10-09 10:35:48,657 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:48,657 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:48,657 INFO L82 PathProgramCache]: Analyzing trace with hash 748989528, now seen corresponding path program 12 times [2020-10-09 10:35:48,658 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:48,658 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [195766177] [2020-10-09 10:35:48,658 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:48,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:48,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [195766177] [2020-10-09 10:35:48,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144215385] [2020-10-09 10:35:48,730 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 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 29 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:48,778 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:35:48,779 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:48,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:48,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:48,876 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:48,876 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:48,876 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:48,877 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263077719] [2020-10-09 10:35:48,877 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:48,877 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:48,877 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:48,878 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:48,878 INFO L87 Difference]: Start difference. First operand 110 states and 268 transitions. Second operand 13 states. [2020-10-09 10:35:48,959 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:48,959 INFO L93 Difference]: Finished difference Result 142 states and 332 transitions. [2020-10-09 10:35:48,959 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:48,960 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:48,960 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:48,961 INFO L225 Difference]: With dead ends: 142 [2020-10-09 10:35:48,961 INFO L226 Difference]: Without dead ends: 139 [2020-10-09 10:35:48,961 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:48,962 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 139 states. [2020-10-09 10:35:48,965 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 139 to 112. [2020-10-09 10:35:48,965 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-09 10:35:48,966 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-09 10:35:48,966 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 11 [2020-10-09 10:35:48,966 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:48,966 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-09 10:35:48,966 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:48,966 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-09 10:35:48,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:48,967 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:48,967 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:49,177 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-09 10:35:49,177 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:49,178 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:49,178 INFO L82 PathProgramCache]: Analyzing trace with hash 749681448, now seen corresponding path program 13 times [2020-10-09 10:35:49,178 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:49,178 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734633944] [2020-10-09 10:35:49,178 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:49,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:49,246 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734633944] [2020-10-09 10:35:49,260 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586241289] [2020-10-09 10:35:49,260 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 30 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:49,297 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:49,298 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:49,299 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:49,389 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:49,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:49,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907117904] [2020-10-09 10:35:49,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:49,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:49,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:49,391 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:49,391 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 13 states. [2020-10-09 10:35:49,491 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:49,491 INFO L93 Difference]: Finished difference Result 141 states and 332 transitions. [2020-10-09 10:35:49,491 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:49,491 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:49,492 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:49,493 INFO L225 Difference]: With dead ends: 141 [2020-10-09 10:35:49,493 INFO L226 Difference]: Without dead ends: 138 [2020-10-09 10:35:49,493 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 38 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:49,494 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-09 10:35:49,498 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 114. [2020-10-09 10:35:49,498 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-09 10:35:49,499 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 282 transitions. [2020-10-09 10:35:49,499 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 282 transitions. Word has length 11 [2020-10-09 10:35:49,499 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:49,499 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 282 transitions. [2020-10-09 10:35:49,499 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:49,499 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 282 transitions. [2020-10-09 10:35:49,500 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-09 10:35:49,500 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:49,500 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:49,709 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-09 10:35:49,710 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:49,710 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:49,710 INFO L82 PathProgramCache]: Analyzing trace with hash 749703768, now seen corresponding path program 14 times [2020-10-09 10:35:49,711 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:49,711 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1412449160] [2020-10-09 10:35:49,711 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:49,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:49,772 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1412449160] [2020-10-09 10:35:49,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276819832] [2020-10-09 10:35:49,773 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 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 31 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:49,816 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:49,816 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:49,817 INFO L263 TraceCheckSpWp]: Trace formula consists of 78 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:49,818 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:49,889 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:49,898 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:49,898 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:49,898 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:49,899 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440545943] [2020-10-09 10:35:49,899 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:49,899 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:49,899 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:49,899 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:49,900 INFO L87 Difference]: Start difference. First operand 114 states and 282 transitions. Second operand 13 states. [2020-10-09 10:35:50,033 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:50,033 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-09 10:35:50,034 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:50,034 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 11 [2020-10-09 10:35:50,034 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:50,035 INFO L225 Difference]: With dead ends: 150 [2020-10-09 10:35:50,036 INFO L226 Difference]: Without dead ends: 144 [2020-10-09 10:35:50,036 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=103, Invalid=203, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:50,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-09 10:35:50,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-09 10:35:50,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-09 10:35:50,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-09 10:35:50,040 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-09 10:35:50,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:50,040 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-09 10:35:50,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:50,040 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-09 10:35:50,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:50,041 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:50,041 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:50,251 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:50,252 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:50,252 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:50,252 INFO L82 PathProgramCache]: Analyzing trace with hash 920465749, now seen corresponding path program 20 times [2020-10-09 10:35:50,252 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:50,253 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [464525473] [2020-10-09 10:35:50,253 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:50,259 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:50,319 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:50,319 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [464525473] [2020-10-09 10:35:50,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2131037407] [2020-10-09 10:35:50,320 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 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 32 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:50,359 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:50,359 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:50,360 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:50,361 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:50,447 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:50,447 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:50,448 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:50,448 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1713500553] [2020-10-09 10:35:50,448 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:50,448 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:50,449 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:50,449 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:50,449 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 13 states. [2020-10-09 10:35:50,492 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:50,493 INFO L93 Difference]: Finished difference Result 138 states and 332 transitions. [2020-10-09 10:35:50,493 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2020-10-09 10:35:50,493 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:50,493 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:50,494 INFO L225 Difference]: With dead ends: 138 [2020-10-09 10:35:50,494 INFO L226 Difference]: Without dead ends: 136 [2020-10-09 10:35:50,494 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 17 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 32 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:50,495 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-09 10:35:50,497 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 117. [2020-10-09 10:35:50,497 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-09 10:35:50,498 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 294 transitions. [2020-10-09 10:35:50,498 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 294 transitions. Word has length 12 [2020-10-09 10:35:50,498 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:50,498 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 294 transitions. [2020-10-09 10:35:50,498 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:50,498 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 294 transitions. [2020-10-09 10:35:50,499 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:50,499 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:50,499 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:50,699 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-09 10:35:50,700 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:50,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:50,701 INFO L82 PathProgramCache]: Analyzing trace with hash 920466710, now seen corresponding path program 21 times [2020-10-09 10:35:50,701 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:50,701 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2072122715] [2020-10-09 10:35:50,702 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:50,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:50,767 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:50,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2072122715] [2020-10-09 10:35:50,768 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1631974504] [2020-10-09 10:35:50,768 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 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 33 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:50,806 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:50,806 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:50,807 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:50,808 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:50,903 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:50,904 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:50,904 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:50,904 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781815446] [2020-10-09 10:35:50,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:50,904 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:50,905 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:50,905 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:50,905 INFO L87 Difference]: Start difference. First operand 117 states and 294 transitions. Second operand 13 states. [2020-10-09 10:35:51,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:51,011 INFO L93 Difference]: Finished difference Result 145 states and 346 transitions. [2020-10-09 10:35:51,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:51,012 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:51,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:51,014 INFO L225 Difference]: With dead ends: 145 [2020-10-09 10:35:51,015 INFO L226 Difference]: Without dead ends: 143 [2020-10-09 10:35:51,015 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=83, Invalid=157, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:35:51,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-09 10:35:51,018 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 115. [2020-10-09 10:35:51,018 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 115 states. [2020-10-09 10:35:51,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 115 states to 115 states and 288 transitions. [2020-10-09 10:35:51,019 INFO L78 Accepts]: Start accepts. Automaton has 115 states and 288 transitions. Word has length 12 [2020-10-09 10:35:51,019 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:51,019 INFO L481 AbstractCegarLoop]: Abstraction has 115 states and 288 transitions. [2020-10-09 10:35:51,019 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:51,019 INFO L276 IsEmpty]: Start isEmpty. Operand 115 states and 288 transitions. [2020-10-09 10:35:51,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:51,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:51,020 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:51,227 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-09 10:35:51,228 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:51,228 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:51,228 INFO L82 PathProgramCache]: Analyzing trace with hash 920495540, now seen corresponding path program 22 times [2020-10-09 10:35:51,229 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:51,229 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1723781597] [2020-10-09 10:35:51,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:51,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:51,292 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1723781597] [2020-10-09 10:35:51,293 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [852815597] [2020-10-09 10:35:51,293 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 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 34 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:51,329 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:51,330 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:51,332 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:51,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:51,437 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,438 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:51,438 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:51,438 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1984883782] [2020-10-09 10:35:51,438 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:51,439 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:51,439 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:51,439 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:51,439 INFO L87 Difference]: Start difference. First operand 115 states and 288 transitions. Second operand 13 states. [2020-10-09 10:35:51,568 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:51,569 INFO L93 Difference]: Finished difference Result 150 states and 356 transitions. [2020-10-09 10:35:51,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:51,569 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:51,569 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:51,570 INFO L225 Difference]: With dead ends: 150 [2020-10-09 10:35:51,571 INFO L226 Difference]: Without dead ends: 148 [2020-10-09 10:35:51,571 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:51,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 148 states. [2020-10-09 10:35:51,574 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 148 to 116. [2020-10-09 10:35:51,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-09 10:35:51,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 289 transitions. [2020-10-09 10:35:51,575 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 289 transitions. Word has length 12 [2020-10-09 10:35:51,575 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:51,575 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 289 transitions. [2020-10-09 10:35:51,576 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:51,576 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 289 transitions. [2020-10-09 10:35:51,576 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:51,576 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:51,576 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:51,787 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,34 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:51,787 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:51,788 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:51,788 INFO L82 PathProgramCache]: Analyzing trace with hash 921389270, now seen corresponding path program 23 times [2020-10-09 10:35:51,788 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:51,789 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2098163254] [2020-10-09 10:35:51,789 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:51,796 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:51,861 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:51,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2098163254] [2020-10-09 10:35:51,861 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [575537236] [2020-10-09 10:35:51,861 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 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 35 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:51,906 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:35:51,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:51,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:51,911 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:52,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,025 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:52,025 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:52,025 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472645787] [2020-10-09 10:35:52,025 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:52,025 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:52,026 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:52,026 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:52,026 INFO L87 Difference]: Start difference. First operand 116 states and 289 transitions. Second operand 13 states. [2020-10-09 10:35:52,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:52,141 INFO L93 Difference]: Finished difference Result 148 states and 352 transitions. [2020-10-09 10:35:52,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:52,142 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:52,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:52,143 INFO L225 Difference]: With dead ends: 148 [2020-10-09 10:35:52,143 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 10:35:52,144 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=94, Invalid=178, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:52,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 10:35:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 120. [2020-10-09 10:35:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:52,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-09 10:35:52,148 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-09 10:35:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:52,148 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-09 10:35:52,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:52,148 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-09 10:35:52,148 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:52,148 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:52,149 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:52,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-09 10:35:52,350 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:52,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:52,350 INFO L82 PathProgramCache]: Analyzing trace with hash 921390231, now seen corresponding path program 24 times [2020-10-09 10:35:52,350 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:52,351 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [803162079] [2020-10-09 10:35:52,351 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:52,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:52,421 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [803162079] [2020-10-09 10:35:52,422 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1515992423] [2020-10-09 10:35:52,422 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 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 36 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:52,458 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:52,458 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:52,459 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:52,460 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:52,552 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,553 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:52,553 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:52,553 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [774831830] [2020-10-09 10:35:52,554 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:52,554 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:52,554 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:52,554 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=104, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:52,554 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-09 10:35:52,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:52,677 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-09 10:35:52,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:52,678 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:52,678 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:52,679 INFO L225 Difference]: With dead ends: 149 [2020-10-09 10:35:52,679 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 10:35:52,679 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 56 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=95, Invalid=177, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:52,680 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 10:35:52,682 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 118. [2020-10-09 10:35:52,683 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:35:52,683 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 293 transitions. [2020-10-09 10:35:52,683 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 293 transitions. Word has length 12 [2020-10-09 10:35:52,683 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:52,684 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 293 transitions. [2020-10-09 10:35:52,684 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:52,684 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 293 transitions. [2020-10-09 10:35:52,684 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:52,684 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:52,684 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:52,893 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,36 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:52,894 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:52,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:52,894 INFO L82 PathProgramCache]: Analyzing trace with hash 1557695239, now seen corresponding path program 25 times [2020-10-09 10:35:52,895 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:52,895 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789983470] [2020-10-09 10:35:52,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:52,902 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:52,979 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:52,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789983470] [2020-10-09 10:35:52,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [490446655] [2020-10-09 10:35:52,980 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 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 37 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:53,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:53,018 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:53,018 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:53,113 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,113 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:53,113 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:53,113 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2074922286] [2020-10-09 10:35:53,114 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:53,114 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:53,114 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:53,114 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=111, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:53,115 INFO L87 Difference]: Start difference. First operand 118 states and 293 transitions. Second operand 13 states. [2020-10-09 10:35:53,177 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:53,177 INFO L93 Difference]: Finished difference Result 152 states and 360 transitions. [2020-10-09 10:35:53,178 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:35:53,178 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:53,178 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:53,179 INFO L225 Difference]: With dead ends: 152 [2020-10-09 10:35:53,179 INFO L226 Difference]: Without dead ends: 150 [2020-10-09 10:35:53,180 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 12 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=58, Invalid=124, Unknown=0, NotChecked=0, Total=182 [2020-10-09 10:35:53,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 150 states. [2020-10-09 10:35:53,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 150 to 122. [2020-10-09 10:35:53,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:35:53,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 305 transitions. [2020-10-09 10:35:53,183 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 305 transitions. Word has length 12 [2020-10-09 10:35:53,183 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:53,183 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 305 transitions. [2020-10-09 10:35:53,184 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:53,184 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 305 transitions. [2020-10-09 10:35:53,184 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:53,184 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:53,184 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:53,385 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-09 10:35:53,385 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:53,386 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:53,386 INFO L82 PathProgramCache]: Analyzing trace with hash 1557696200, now seen corresponding path program 26 times [2020-10-09 10:35:53,386 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:53,386 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [478216985] [2020-10-09 10:35:53,387 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:53,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:53,462 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [478216985] [2020-10-09 10:35:53,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186166066] [2020-10-09 10:35:53,462 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 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 38 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:53,500 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:53,500 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:53,501 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:53,502 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:53,587 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,587 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:53,587 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:53,587 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1928856445] [2020-10-09 10:35:53,587 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:53,588 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:53,588 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:53,588 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:53,588 INFO L87 Difference]: Start difference. First operand 122 states and 305 transitions. Second operand 13 states. [2020-10-09 10:35:53,714 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:53,714 INFO L93 Difference]: Finished difference Result 153 states and 361 transitions. [2020-10-09 10:35:53,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:53,715 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:53,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:53,716 INFO L225 Difference]: With dead ends: 153 [2020-10-09 10:35:53,717 INFO L226 Difference]: Without dead ends: 151 [2020-10-09 10:35:53,717 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=90, Invalid=182, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:35:53,718 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-09 10:35:53,721 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 120. [2020-10-09 10:35:53,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:53,722 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 299 transitions. [2020-10-09 10:35:53,722 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 299 transitions. Word has length 12 [2020-10-09 10:35:53,722 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:53,722 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 299 transitions. [2020-10-09 10:35:53,722 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:53,723 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 299 transitions. [2020-10-09 10:35:53,723 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:53,723 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:53,723 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:53,934 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable44 [2020-10-09 10:35:53,935 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:53,935 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:53,935 INFO L82 PathProgramCache]: Analyzing trace with hash 1557725030, now seen corresponding path program 27 times [2020-10-09 10:35:53,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:53,936 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1235974498] [2020-10-09 10:35:53,936 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:53,942 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:53,998 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1235974498] [2020-10-09 10:35:53,999 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330807577] [2020-10-09 10:35:53,999 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 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 39 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:54,057 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:54,057 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:54,058 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:54,059 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:54,172 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:54,173 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:54,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:54,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435410906] [2020-10-09 10:35:54,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:54,174 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:54,174 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:54,174 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:54,174 INFO L87 Difference]: Start difference. First operand 120 states and 299 transitions. Second operand 13 states. [2020-10-09 10:35:54,305 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:54,305 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:35:54,305 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:54,306 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:54,306 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:54,308 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:35:54,308 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 10:35:54,309 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:54,309 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 10:35:54,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 119. [2020-10-09 10:35:54,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-09 10:35:54,312 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 295 transitions. [2020-10-09 10:35:54,312 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 295 transitions. Word has length 12 [2020-10-09 10:35:54,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:54,313 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 295 transitions. [2020-10-09 10:35:54,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:54,313 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 295 transitions. [2020-10-09 10:35:54,313 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:54,313 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:54,314 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:54,520 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 39 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-09 10:35:54,521 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:54,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:54,521 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251029, now seen corresponding path program 28 times [2020-10-09 10:35:54,522 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:54,522 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2027899284] [2020-10-09 10:35:54,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:54,528 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:54,593 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:54,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2027899284] [2020-10-09 10:35:54,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451551234] [2020-10-09 10:35:54,594 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 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 40 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:54,631 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:54,631 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:54,632 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:54,633 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:54,725 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:54,725 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:54,725 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:54,726 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1832897117] [2020-10-09 10:35:54,726 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:54,726 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:54,727 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:54,727 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=113, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:54,727 INFO L87 Difference]: Start difference. First operand 119 states and 295 transitions. Second operand 13 states. [2020-10-09 10:35:54,813 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:54,813 INFO L93 Difference]: Finished difference Result 148 states and 351 transitions. [2020-10-09 10:35:54,813 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:35:54,814 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:54,814 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:54,815 INFO L225 Difference]: With dead ends: 148 [2020-10-09 10:35:54,815 INFO L226 Difference]: Without dead ends: 146 [2020-10-09 10:35:54,816 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=68, Invalid=142, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:35:54,816 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 146 states. [2020-10-09 10:35:54,819 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 146 to 121. [2020-10-09 10:35:54,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:54,819 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-09 10:35:54,820 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-09 10:35:54,820 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:54,820 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-09 10:35:54,820 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:54,820 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-09 10:35:54,821 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:54,821 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:54,821 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:55,032 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2020-10-09 10:35:55,032 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:55,033 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:55,033 INFO L82 PathProgramCache]: Analyzing trace with hash 1578251990, now seen corresponding path program 29 times [2020-10-09 10:35:55,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:55,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1416589732] [2020-10-09 10:35:55,033 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:55,038 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:55,093 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1416589732] [2020-10-09 10:35:55,093 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2010082634] [2020-10-09 10:35:55,093 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 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 41 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:55,141 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:55,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:55,142 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:55,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:55,251 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,251 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:55,252 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:55,252 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1197447999] [2020-10-09 10:35:55,252 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:55,252 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:55,253 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:55,253 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:55,253 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-09 10:35:55,390 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:55,391 INFO L93 Difference]: Finished difference Result 157 states and 368 transitions. [2020-10-09 10:35:55,391 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:55,391 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:55,391 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:55,393 INFO L225 Difference]: With dead ends: 157 [2020-10-09 10:35:55,393 INFO L226 Difference]: Without dead ends: 155 [2020-10-09 10:35:55,393 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 59 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:35:55,394 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-09 10:35:55,396 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 120. [2020-10-09 10:35:55,396 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:35:55,396 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 297 transitions. [2020-10-09 10:35:55,396 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 297 transitions. Word has length 12 [2020-10-09 10:35:55,397 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:55,397 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 297 transitions. [2020-10-09 10:35:55,397 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:55,397 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 297 transitions. [2020-10-09 10:35:55,397 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:55,397 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:55,397 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:55,598 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:55,598 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:55,598 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:55,599 INFO L82 PathProgramCache]: Analyzing trace with hash 1578914119, now seen corresponding path program 30 times [2020-10-09 10:35:55,599 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:55,599 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1864355588] [2020-10-09 10:35:55,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:55,605 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:55,661 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1864355588] [2020-10-09 10:35:55,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1776434873] [2020-10-09 10:35:55,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 42 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:55,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:55,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:55,700 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:35:55,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:55,718 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:55,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:55,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 7 [2020-10-09 10:35:55,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [767270728] [2020-10-09 10:35:55,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-09 10:35:55,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:55,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-09 10:35:55,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2020-10-09 10:35:55,720 INFO L87 Difference]: Start difference. First operand 120 states and 297 transitions. Second operand 9 states. [2020-10-09 10:35:55,809 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:55,809 INFO L93 Difference]: Finished difference Result 149 states and 350 transitions. [2020-10-09 10:35:55,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:35:55,810 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-09 10:35:55,810 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:55,811 INFO L225 Difference]: With dead ends: 149 [2020-10-09 10:35:55,811 INFO L226 Difference]: Without dead ends: 147 [2020-10-09 10:35:55,812 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 10 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 22 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=52, Invalid=80, Unknown=0, NotChecked=0, Total=132 [2020-10-09 10:35:55,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-09 10:35:55,814 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 124. [2020-10-09 10:35:55,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:55,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:55,815 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:55,815 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:55,815 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:55,815 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-09 10:35:55,815 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:55,816 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:55,816 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:55,816 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:56,016 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-09 10:35:56,017 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:56,017 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:56,017 INFO L82 PathProgramCache]: Analyzing trace with hash 1578936439, now seen corresponding path program 31 times [2020-10-09 10:35:56,018 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:56,018 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1479496277] [2020-10-09 10:35:56,018 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:56,024 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:56,071 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1479496277] [2020-10-09 10:35:56,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1782347433] [2020-10-09 10:35:56,072 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 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 43 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:56,109 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:56,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:56,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:56,184 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:56,213 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:56,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:56,214 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1479766510] [2020-10-09 10:35:56,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:56,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:56,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:56,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:56,216 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:56,474 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:56,474 INFO L93 Difference]: Finished difference Result 164 states and 389 transitions. [2020-10-09 10:35:56,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:56,474 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:56,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:56,476 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:35:56,476 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:35:56,476 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:35:56,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:35:56,479 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-09 10:35:56,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:35:56,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 296 transitions. [2020-10-09 10:35:56,480 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 296 transitions. Word has length 12 [2020-10-09 10:35:56,480 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:56,480 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 296 transitions. [2020-10-09 10:35:56,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:56,480 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 296 transitions. [2020-10-09 10:35:56,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:56,481 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:56,481 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:56,690 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-09 10:35:56,690 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:56,691 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:56,691 INFO L82 PathProgramCache]: Analyzing trace with hash 1578943910, now seen corresponding path program 32 times [2020-10-09 10:35:56,691 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:56,691 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1665691896] [2020-10-09 10:35:56,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:56,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:56,744 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1665691896] [2020-10-09 10:35:56,745 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [368817182] [2020-10-09 10:35:56,745 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 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 44 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:56,780 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:56,780 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:56,780 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:56,781 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:56,891 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:56,892 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:56,892 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:56,892 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1965031996] [2020-10-09 10:35:56,892 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:56,892 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:56,893 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:56,893 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:56,893 INFO L87 Difference]: Start difference. First operand 122 states and 296 transitions. Second operand 13 states. [2020-10-09 10:35:57,070 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:57,070 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:35:57,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:35:57,071 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:57,071 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:57,072 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:35:57,072 INFO L226 Difference]: Without dead ends: 154 [2020-10-09 10:35:57,073 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 54 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=232, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:35:57,073 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2020-10-09 10:35:57,075 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 124. [2020-10-09 10:35:57,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:57,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:57,076 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:57,076 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:57,077 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:57,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:57,077 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:57,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:57,077 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:57,078 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:57,286 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,44 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:57,287 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:57,287 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:57,287 INFO L82 PathProgramCache]: Analyzing trace with hash 1578965269, now seen corresponding path program 33 times [2020-10-09 10:35:57,288 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:57,288 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81595463] [2020-10-09 10:35:57,288 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:57,293 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:57,342 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:57,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81595463] [2020-10-09 10:35:57,342 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2035028548] [2020-10-09 10:35:57,342 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 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 45 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:57,404 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:35:57,404 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:57,405 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:57,407 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:57,517 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:35:57,561 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:57,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:57,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:57,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1732171187] [2020-10-09 10:35:57,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:57,562 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:57,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:57,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=103, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:57,563 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:57,922 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:57,922 INFO L93 Difference]: Finished difference Result 176 states and 416 transitions. [2020-10-09 10:35:57,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:35:57,923 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:57,923 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:57,925 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:35:57,925 INFO L226 Difference]: Without dead ends: 171 [2020-10-09 10:35:57,925 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=186, Invalid=366, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:35:57,926 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-09 10:35:57,928 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 124. [2020-10-09 10:35:57,929 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 124 states. [2020-10-09 10:35:57,929 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 124 states to 124 states and 303 transitions. [2020-10-09 10:35:57,929 INFO L78 Accepts]: Start accepts. Automaton has 124 states and 303 transitions. Word has length 12 [2020-10-09 10:35:57,929 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:57,929 INFO L481 AbstractCegarLoop]: Abstraction has 124 states and 303 transitions. [2020-10-09 10:35:57,929 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:57,930 INFO L276 IsEmpty]: Start isEmpty. Operand 124 states and 303 transitions. [2020-10-09 10:35:57,930 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:57,930 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:57,930 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:58,141 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable51 [2020-10-09 10:35:58,142 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:58,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:58,142 INFO L82 PathProgramCache]: Analyzing trace with hash 1578966230, now seen corresponding path program 34 times [2020-10-09 10:35:58,143 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:58,143 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1755280367] [2020-10-09 10:35:58,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:58,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:58,192 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1755280367] [2020-10-09 10:35:58,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1626674376] [2020-10-09 10:35:58,193 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 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 46 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:58,243 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:35:58,243 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:58,244 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:58,245 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:58,314 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:35:58,348 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,348 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:58,348 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:58,348 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1639377277] [2020-10-09 10:35:58,349 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:58,349 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:58,349 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:58,349 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:58,349 INFO L87 Difference]: Start difference. First operand 124 states and 303 transitions. Second operand 13 states. [2020-10-09 10:35:58,584 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:58,584 INFO L93 Difference]: Finished difference Result 166 states and 393 transitions. [2020-10-09 10:35:58,584 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:58,584 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:58,585 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:58,586 INFO L225 Difference]: With dead ends: 166 [2020-10-09 10:35:58,586 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:35:58,586 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 65 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:35:58,587 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:35:58,589 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 121. [2020-10-09 10:35:58,589 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:35:58,589 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 294 transitions. [2020-10-09 10:35:58,590 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 294 transitions. Word has length 12 [2020-10-09 10:35:58,590 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:58,590 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 294 transitions. [2020-10-09 10:35:58,590 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:58,590 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 294 transitions. [2020-10-09 10:35:58,591 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:58,591 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:58,591 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:58,799 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,46 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:58,799 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:58,800 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:58,800 INFO L82 PathProgramCache]: Analyzing trace with hash 1579174550, now seen corresponding path program 35 times [2020-10-09 10:35:58,800 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:58,801 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [700367140] [2020-10-09 10:35:58,801 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:58,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:58,875 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:58,875 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [700367140] [2020-10-09 10:35:58,876 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1173325988] [2020-10-09 10:35:58,876 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 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 47 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:58,934 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:35:58,934 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:58,935 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:58,936 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:59,073 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:59,074 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:59,074 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:59,074 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1251542030] [2020-10-09 10:35:59,074 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:59,075 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:59,075 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:59,075 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:59,076 INFO L87 Difference]: Start difference. First operand 121 states and 294 transitions. Second operand 13 states. [2020-10-09 10:35:59,301 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:35:59,302 INFO L93 Difference]: Finished difference Result 163 states and 379 transitions. [2020-10-09 10:35:59,302 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:35:59,302 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:35:59,302 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:35:59,303 INFO L225 Difference]: With dead ends: 163 [2020-10-09 10:35:59,304 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:35:59,304 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=104, Invalid=238, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:35:59,304 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:35:59,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 123. [2020-10-09 10:35:59,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 123 states. [2020-10-09 10:35:59,307 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 123 states to 123 states and 301 transitions. [2020-10-09 10:35:59,307 INFO L78 Accepts]: Start accepts. Automaton has 123 states and 301 transitions. Word has length 12 [2020-10-09 10:35:59,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:35:59,307 INFO L481 AbstractCegarLoop]: Abstraction has 123 states and 301 transitions. [2020-10-09 10:35:59,307 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:35:59,307 INFO L276 IsEmpty]: Start isEmpty. Operand 123 states and 301 transitions. [2020-10-09 10:35:59,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:35:59,308 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:35:59,308 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:35:59,516 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-09 10:35:59,516 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:35:59,517 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:35:59,517 INFO L82 PathProgramCache]: Analyzing trace with hash 1579837640, now seen corresponding path program 36 times [2020-10-09 10:35:59,517 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:35:59,518 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320540159] [2020-10-09 10:35:59,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:35:59,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:35:59,614 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:59,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320540159] [2020-10-09 10:35:59,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [995388971] [2020-10-09 10:35:59,614 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 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 48 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:35:59,675 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:35:59,675 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:35:59,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:35:59,677 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:35:59,780 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:35:59,780 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:35:59,781 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:35:59,781 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1192105979] [2020-10-09 10:35:59,781 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:35:59,781 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:35:59,781 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:35:59,782 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:35:59,782 INFO L87 Difference]: Start difference. First operand 123 states and 301 transitions. Second operand 13 states. [2020-10-09 10:36:00,013 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:00,013 INFO L93 Difference]: Finished difference Result 170 states and 399 transitions. [2020-10-09 10:36:00,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:00,013 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:00,014 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:00,015 INFO L225 Difference]: With dead ends: 170 [2020-10-09 10:36:00,015 INFO L226 Difference]: Without dead ends: 168 [2020-10-09 10:36:00,015 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=149, Invalid=313, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:36:00,016 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2020-10-09 10:36:00,019 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 125. [2020-10-09 10:36:00,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 125 states. [2020-10-09 10:36:00,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 125 states to 125 states and 308 transitions. [2020-10-09 10:36:00,019 INFO L78 Accepts]: Start accepts. Automaton has 125 states and 308 transitions. Word has length 12 [2020-10-09 10:36:00,020 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:00,020 INFO L481 AbstractCegarLoop]: Abstraction has 125 states and 308 transitions. [2020-10-09 10:36:00,020 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:00,020 INFO L276 IsEmpty]: Start isEmpty. Operand 125 states and 308 transitions. [2020-10-09 10:36:00,020 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:00,020 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:00,021 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:00,231 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:00,232 INFO L429 AbstractCegarLoop]: === Iteration 56 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:00,232 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:00,232 INFO L82 PathProgramCache]: Analyzing trace with hash 1579858999, now seen corresponding path program 37 times [2020-10-09 10:36:00,232 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:00,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1818726830] [2020-10-09 10:36:00,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:00,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:00,291 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1818726830] [2020-10-09 10:36:00,291 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2051566234] [2020-10-09 10:36:00,292 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 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 49 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:00,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:00,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:00,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:00,403 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:00,409 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,410 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:00,410 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:00,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1595686359] [2020-10-09 10:36:00,411 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:00,411 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:00,411 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:00,412 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:00,412 INFO L87 Difference]: Start difference. First operand 125 states and 308 transitions. Second operand 13 states. [2020-10-09 10:36:00,665 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:00,665 INFO L93 Difference]: Finished difference Result 177 states and 424 transitions. [2020-10-09 10:36:00,665 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:00,665 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:00,665 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:00,667 INFO L225 Difference]: With dead ends: 177 [2020-10-09 10:36:00,667 INFO L226 Difference]: Without dead ends: 172 [2020-10-09 10:36:00,667 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:36:00,667 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-09 10:36:00,670 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 126. [2020-10-09 10:36:00,670 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 126 states. [2020-10-09 10:36:00,671 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 126 states to 126 states and 313 transitions. [2020-10-09 10:36:00,671 INFO L78 Accepts]: Start accepts. Automaton has 126 states and 313 transitions. Word has length 12 [2020-10-09 10:36:00,671 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:00,671 INFO L481 AbstractCegarLoop]: Abstraction has 126 states and 313 transitions. [2020-10-09 10:36:00,671 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:00,672 INFO L276 IsEmpty]: Start isEmpty. Operand 126 states and 313 transitions. [2020-10-09 10:36:00,672 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:00,672 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:00,672 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:00,882 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2020-10-09 10:36:00,882 INFO L429 AbstractCegarLoop]: === Iteration 57 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:00,883 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:00,883 INFO L82 PathProgramCache]: Analyzing trace with hash 1579859960, now seen corresponding path program 38 times [2020-10-09 10:36:00,883 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:00,883 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668332239] [2020-10-09 10:36:00,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:00,889 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:00,940 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:00,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668332239] [2020-10-09 10:36:00,940 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742058272] [2020-10-09 10:36:00,941 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 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 50 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:00,978 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:00,978 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:00,979 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:00,979 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:01,048 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:01,059 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,059 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:01,059 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:01,059 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1961773599] [2020-10-09 10:36:01,060 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:01,060 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:01,060 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:01,060 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:01,060 INFO L87 Difference]: Start difference. First operand 126 states and 313 transitions. Second operand 13 states. [2020-10-09 10:36:01,428 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:01,428 INFO L93 Difference]: Finished difference Result 190 states and 454 transitions. [2020-10-09 10:36:01,429 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:01,429 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:01,429 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:01,430 INFO L225 Difference]: With dead ends: 190 [2020-10-09 10:36:01,431 INFO L226 Difference]: Without dead ends: 182 [2020-10-09 10:36:01,431 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 143 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:36:01,431 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-09 10:36:01,434 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 121. [2020-10-09 10:36:01,434 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:36:01,434 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 297 transitions. [2020-10-09 10:36:01,435 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 297 transitions. Word has length 12 [2020-10-09 10:36:01,435 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:01,435 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 297 transitions. [2020-10-09 10:36:01,435 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:01,435 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 297 transitions. [2020-10-09 10:36:01,436 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:01,436 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:01,436 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:01,637 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable56 [2020-10-09 10:36:01,637 INFO L429 AbstractCegarLoop]: === Iteration 58 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:01,637 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:01,638 INFO L82 PathProgramCache]: Analyzing trace with hash 1579888790, now seen corresponding path program 39 times [2020-10-09 10:36:01,638 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:01,638 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [516829245] [2020-10-09 10:36:01,638 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:01,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:01,692 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [516829245] [2020-10-09 10:36:01,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1244543243] [2020-10-09 10:36:01,693 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 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 51 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:01,729 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:01,729 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:01,730 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:01,731 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:01,798 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:01,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:01,807 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:01,807 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:01,808 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470426572] [2020-10-09 10:36:01,808 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:01,808 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:01,808 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:01,808 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:01,809 INFO L87 Difference]: Start difference. First operand 121 states and 297 transitions. Second operand 13 states. [2020-10-09 10:36:02,140 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:02,140 INFO L93 Difference]: Finished difference Result 180 states and 427 transitions. [2020-10-09 10:36:02,140 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:02,141 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:02,141 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:02,142 INFO L225 Difference]: With dead ends: 180 [2020-10-09 10:36:02,142 INFO L226 Difference]: Without dead ends: 175 [2020-10-09 10:36:02,142 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:36:02,143 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-09 10:36:02,145 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 120. [2020-10-09 10:36:02,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:36:02,145 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 292 transitions. [2020-10-09 10:36:02,145 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 292 transitions. Word has length 12 [2020-10-09 10:36:02,146 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:02,146 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 292 transitions. [2020-10-09 10:36:02,146 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:02,146 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 292 transitions. [2020-10-09 10:36:02,146 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:02,146 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:02,146 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:02,352 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 51 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2020-10-09 10:36:02,353 INFO L429 AbstractCegarLoop]: === Iteration 59 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:02,353 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:02,353 INFO L82 PathProgramCache]: Analyzing trace with hash 1586324390, now seen corresponding path program 40 times [2020-10-09 10:36:02,354 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:02,354 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [92747912] [2020-10-09 10:36:02,354 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:02,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:02,409 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [92747912] [2020-10-09 10:36:02,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1929449626] [2020-10-09 10:36:02,410 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 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 52 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:02,485 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:02,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:02,486 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:02,487 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:02,560 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:02,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:02,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087474985] [2020-10-09 10:36:02,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:02,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:02,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:02,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=114, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:02,562 INFO L87 Difference]: Start difference. First operand 120 states and 292 transitions. Second operand 13 states. [2020-10-09 10:36:02,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:02,703 INFO L93 Difference]: Finished difference Result 164 states and 379 transitions. [2020-10-09 10:36:02,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:02,703 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:02,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:02,705 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:36:02,705 INFO L226 Difference]: Without dead ends: 162 [2020-10-09 10:36:02,705 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=99, Invalid=207, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:36:02,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2020-10-09 10:36:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 121. [2020-10-09 10:36:02,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:36:02,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 295 transitions. [2020-10-09 10:36:02,709 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 295 transitions. Word has length 12 [2020-10-09 10:36:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:02,709 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 295 transitions. [2020-10-09 10:36:02,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:02,709 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 295 transitions. [2020-10-09 10:36:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:02,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:02,710 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:02,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable58 [2020-10-09 10:36:02,914 INFO L429 AbstractCegarLoop]: === Iteration 60 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:02,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:02,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1586325351, now seen corresponding path program 41 times [2020-10-09 10:36:02,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:02,915 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [13265047] [2020-10-09 10:36:02,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:02,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:02,975 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:02,975 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [13265047] [2020-10-09 10:36:02,976 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [737317553] [2020-10-09 10:36:02,976 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 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 53 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:03,013 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:03,013 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:03,014 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:03,015 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:03,101 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,101 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:03,102 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:03,102 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [657246663] [2020-10-09 10:36:03,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:03,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:03,103 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:03,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:03,103 INFO L87 Difference]: Start difference. First operand 121 states and 295 transitions. Second operand 13 states. [2020-10-09 10:36:03,255 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:03,255 INFO L93 Difference]: Finished difference Result 161 states and 372 transitions. [2020-10-09 10:36:03,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:03,256 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:03,256 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:03,258 INFO L225 Difference]: With dead ends: 161 [2020-10-09 10:36:03,258 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:36:03,258 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=101, Invalid=205, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:36:03,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:36:03,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 118. [2020-10-09 10:36:03,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:36:03,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 287 transitions. [2020-10-09 10:36:03,261 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 287 transitions. Word has length 12 [2020-10-09 10:36:03,261 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:03,261 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 287 transitions. [2020-10-09 10:36:03,261 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:03,261 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 287 transitions. [2020-10-09 10:36:03,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:03,262 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:03,262 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:03,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 53 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2020-10-09 10:36:03,463 INFO L429 AbstractCegarLoop]: === Iteration 61 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:03,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:03,464 INFO L82 PathProgramCache]: Analyzing trace with hash 1606880180, now seen corresponding path program 42 times [2020-10-09 10:36:03,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:03,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612110863] [2020-10-09 10:36:03,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:03,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:03,515 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612110863] [2020-10-09 10:36:03,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [339305633] [2020-10-09 10:36:03,516 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 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 54 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:03,563 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:36:03,564 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:03,564 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:03,565 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:03,684 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:03,684 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:03,685 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:03,685 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851971207] [2020-10-09 10:36:03,685 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:03,685 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:03,686 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:03,686 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:03,686 INFO L87 Difference]: Start difference. First operand 118 states and 287 transitions. Second operand 13 states. [2020-10-09 10:36:03,906 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:03,906 INFO L93 Difference]: Finished difference Result 165 states and 380 transitions. [2020-10-09 10:36:03,907 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:03,907 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:03,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:03,909 INFO L225 Difference]: With dead ends: 165 [2020-10-09 10:36:03,909 INFO L226 Difference]: Without dead ends: 163 [2020-10-09 10:36:03,909 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=265, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:03,910 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 163 states. [2020-10-09 10:36:03,913 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 163 to 118. [2020-10-09 10:36:03,913 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:36:03,914 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 290 transitions. [2020-10-09 10:36:03,914 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 290 transitions. Word has length 12 [2020-10-09 10:36:03,914 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:03,915 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 290 transitions. [2020-10-09 10:36:03,915 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:03,915 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 290 transitions. [2020-10-09 10:36:03,916 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:03,916 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:03,916 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:04,130 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable60 [2020-10-09 10:36:04,130 INFO L429 AbstractCegarLoop]: === Iteration 62 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:04,131 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:04,131 INFO L82 PathProgramCache]: Analyzing trace with hash 1606881141, now seen corresponding path program 43 times [2020-10-09 10:36:04,131 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:04,131 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1251625529] [2020-10-09 10:36:04,131 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:04,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:04,183 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1251625529] [2020-10-09 10:36:04,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598634739] [2020-10-09 10:36:04,183 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 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 55 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:04,223 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:04,223 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:04,224 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:04,306 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,306 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:04,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:04,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [840165164] [2020-10-09 10:36:04,307 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:04,307 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:04,309 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:04,309 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:04,309 INFO L87 Difference]: Start difference. First operand 118 states and 290 transitions. Second operand 13 states. [2020-10-09 10:36:04,521 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:04,522 INFO L93 Difference]: Finished difference Result 167 states and 384 transitions. [2020-10-09 10:36:04,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:04,522 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:04,522 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:04,524 INFO L225 Difference]: With dead ends: 167 [2020-10-09 10:36:04,524 INFO L226 Difference]: Without dead ends: 165 [2020-10-09 10:36:04,524 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=114, Invalid=266, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:04,525 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-09 10:36:04,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-09 10:36:04,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:36:04,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-09 10:36:04,527 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-09 10:36:04,528 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:04,528 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-09 10:36:04,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:04,528 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-09 10:36:04,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:04,528 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:04,529 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:04,735 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,55 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:04,736 INFO L429 AbstractCegarLoop]: === Iteration 63 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:04,736 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:04,736 INFO L82 PathProgramCache]: Analyzing trace with hash 1607543270, now seen corresponding path program 44 times [2020-10-09 10:36:04,737 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:04,737 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [538489263] [2020-10-09 10:36:04,737 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:04,743 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:04,796 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,796 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [538489263] [2020-10-09 10:36:04,797 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [470320268] [2020-10-09 10:36:04,797 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 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 56 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:04,845 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:04,845 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:04,846 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:04,847 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:04,934 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:04,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:04,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:04,935 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1867739168] [2020-10-09 10:36:04,935 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:04,935 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:04,935 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:04,935 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=112, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:04,935 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-09 10:36:05,176 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:05,176 INFO L93 Difference]: Finished difference Result 168 states and 392 transitions. [2020-10-09 10:36:05,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:36:05,177 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:05,177 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:05,178 INFO L225 Difference]: With dead ends: 168 [2020-10-09 10:36:05,178 INFO L226 Difference]: Without dead ends: 166 [2020-10-09 10:36:05,179 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=157, Invalid=349, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:05,179 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-09 10:36:05,181 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 120. [2020-10-09 10:36:05,181 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:36:05,182 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-09 10:36:05,182 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-09 10:36:05,182 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:05,182 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-09 10:36:05,182 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:05,182 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-09 10:36:05,183 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:05,183 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:05,183 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:05,383 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,56 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:05,384 INFO L429 AbstractCegarLoop]: === Iteration 64 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:05,384 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:05,384 INFO L82 PathProgramCache]: Analyzing trace with hash 1607564629, now seen corresponding path program 45 times [2020-10-09 10:36:05,384 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:05,385 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369408373] [2020-10-09 10:36:05,385 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:05,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:05,442 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:05,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369408373] [2020-10-09 10:36:05,443 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1794289414] [2020-10-09 10:36:05,443 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 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 57 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:05,481 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:05,481 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:05,482 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:05,483 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:05,549 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:05,559 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:05,560 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:05,560 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:05,560 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [407220612] [2020-10-09 10:36:05,560 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:05,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:05,561 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:05,561 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:05,561 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-09 10:36:05,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:05,760 INFO L93 Difference]: Finished difference Result 160 states and 384 transitions. [2020-10-09 10:36:05,760 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:05,761 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:05,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:05,762 INFO L225 Difference]: With dead ends: 160 [2020-10-09 10:36:05,762 INFO L226 Difference]: Without dead ends: 155 [2020-10-09 10:36:05,762 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 73 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:05,763 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 155 states. [2020-10-09 10:36:05,765 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 155 to 121. [2020-10-09 10:36:05,765 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 121 states. [2020-10-09 10:36:05,766 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 121 states to 121 states and 301 transitions. [2020-10-09 10:36:05,766 INFO L78 Accepts]: Start accepts. Automaton has 121 states and 301 transitions. Word has length 12 [2020-10-09 10:36:05,766 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:05,766 INFO L481 AbstractCegarLoop]: Abstraction has 121 states and 301 transitions. [2020-10-09 10:36:05,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:05,766 INFO L276 IsEmpty]: Start isEmpty. Operand 121 states and 301 transitions. [2020-10-09 10:36:05,767 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:05,767 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:05,767 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:05,967 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,57 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:05,967 INFO L429 AbstractCegarLoop]: === Iteration 65 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:05,968 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:05,968 INFO L82 PathProgramCache]: Analyzing trace with hash 1607565590, now seen corresponding path program 46 times [2020-10-09 10:36:05,968 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:05,969 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [601869031] [2020-10-09 10:36:05,969 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:05,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:06,026 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [601869031] [2020-10-09 10:36:06,027 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [296271232] [2020-10-09 10:36:06,027 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 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 58 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:06,064 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:06,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:06,065 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:06,066 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:06,134 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:06,165 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,165 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:06,165 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:06,166 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414349419] [2020-10-09 10:36:06,166 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:06,166 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:06,167 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:06,167 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:06,167 INFO L87 Difference]: Start difference. First operand 121 states and 301 transitions. Second operand 13 states. [2020-10-09 10:36:06,510 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:06,511 INFO L93 Difference]: Finished difference Result 189 states and 444 transitions. [2020-10-09 10:36:06,511 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:06,511 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:06,511 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:06,513 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:36:06,513 INFO L226 Difference]: Without dead ends: 181 [2020-10-09 10:36:06,513 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=195, Invalid=405, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:36:06,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-09 10:36:06,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 118. [2020-10-09 10:36:06,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-09 10:36:06,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 289 transitions. [2020-10-09 10:36:06,516 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 289 transitions. Word has length 12 [2020-10-09 10:36:06,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:06,517 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 289 transitions. [2020-10-09 10:36:06,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:06,517 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 289 transitions. [2020-10-09 10:36:06,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:06,517 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:06,517 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:06,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64,58 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:06,718 INFO L429 AbstractCegarLoop]: === Iteration 66 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:06,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:06,719 INFO L82 PathProgramCache]: Analyzing trace with hash 1607573061, now seen corresponding path program 47 times [2020-10-09 10:36:06,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:06,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1586133753] [2020-10-09 10:36:06,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:06,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:06,771 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1586133753] [2020-10-09 10:36:06,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [907908463] [2020-10-09 10:36:06,772 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 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 59 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:06,815 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:06,815 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:06,816 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:06,816 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:06,903 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:06,903 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:06,903 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:06,903 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1996309661] [2020-10-09 10:36:06,904 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:06,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:06,907 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:06,907 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=110, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:06,907 INFO L87 Difference]: Start difference. First operand 118 states and 289 transitions. Second operand 13 states. [2020-10-09 10:36:07,157 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:07,158 INFO L93 Difference]: Finished difference Result 169 states and 393 transitions. [2020-10-09 10:36:07,158 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:36:07,158 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:07,158 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:07,160 INFO L225 Difference]: With dead ends: 169 [2020-10-09 10:36:07,160 INFO L226 Difference]: Without dead ends: 167 [2020-10-09 10:36:07,160 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:07,161 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-09 10:36:07,162 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 120. [2020-10-09 10:36:07,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 120 states. [2020-10-09 10:36:07,163 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 120 states to 120 states and 296 transitions. [2020-10-09 10:36:07,163 INFO L78 Accepts]: Start accepts. Automaton has 120 states and 296 transitions. Word has length 12 [2020-10-09 10:36:07,163 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:07,163 INFO L481 AbstractCegarLoop]: Abstraction has 120 states and 296 transitions. [2020-10-09 10:36:07,163 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:07,163 INFO L276 IsEmpty]: Start isEmpty. Operand 120 states and 296 transitions. [2020-10-09 10:36:07,163 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:07,163 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:07,164 INFO L421 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:07,364 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable65 [2020-10-09 10:36:07,364 INFO L429 AbstractCegarLoop]: === Iteration 67 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:07,365 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:07,365 INFO L82 PathProgramCache]: Analyzing trace with hash 1607594420, now seen corresponding path program 48 times [2020-10-09 10:36:07,365 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:07,366 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1312345343] [2020-10-09 10:36:07,366 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:07,370 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:07,419 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:07,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1312345343] [2020-10-09 10:36:07,419 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [150857885] [2020-10-09 10:36:07,419 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 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 60 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:07,462 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:07,462 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:07,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:07,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:07,533 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:07,541 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:07,541 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:07,541 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:07,541 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1562028450] [2020-10-09 10:36:07,541 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:07,542 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:07,542 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:07,542 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:07,542 INFO L87 Difference]: Start difference. First operand 120 states and 296 transitions. Second operand 13 states. [2020-10-09 10:36:07,885 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:07,885 INFO L93 Difference]: Finished difference Result 192 states and 454 transitions. [2020-10-09 10:36:07,886 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:07,886 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:07,886 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:07,887 INFO L225 Difference]: With dead ends: 192 [2020-10-09 10:36:07,887 INFO L226 Difference]: Without dead ends: 184 [2020-10-09 10:36:07,888 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=227, Invalid=475, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:36:07,888 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 184 states. [2020-10-09 10:36:07,891 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 184 to 119. [2020-10-09 10:36:07,891 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 119 states. [2020-10-09 10:36:07,891 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 119 states to 119 states and 287 transitions. [2020-10-09 10:36:07,891 INFO L78 Accepts]: Start accepts. Automaton has 119 states and 287 transitions. Word has length 12 [2020-10-09 10:36:07,892 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:07,892 INFO L481 AbstractCegarLoop]: Abstraction has 119 states and 287 transitions. [2020-10-09 10:36:07,892 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:07,892 INFO L276 IsEmpty]: Start isEmpty. Operand 119 states and 287 transitions. [2020-10-09 10:36:07,892 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:07,892 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:07,893 INFO L421 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:08,102 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66,60 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:08,103 INFO L429 AbstractCegarLoop]: === Iteration 68 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:08,103 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:08,103 INFO L82 PathProgramCache]: Analyzing trace with hash 1607595381, now seen corresponding path program 49 times [2020-10-09 10:36:08,103 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:08,104 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [399055482] [2020-10-09 10:36:08,104 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:08,108 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:08,153 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:08,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [399055482] [2020-10-09 10:36:08,153 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1292993783] [2020-10-09 10:36:08,153 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 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 61 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:08,196 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:08,196 INFO L263 TraceCheckSpWp]: Trace formula consists of 84 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-09 10:36:08,197 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:08,257 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:08,274 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:08,274 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:08,274 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-09 10:36:08,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [874484304] [2020-10-09 10:36:08,275 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-09 10:36:08,275 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:08,275 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-09 10:36:08,275 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-09 10:36:08,276 INFO L87 Difference]: Start difference. First operand 119 states and 287 transitions. Second operand 13 states. [2020-10-09 10:36:08,573 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:08,574 INFO L93 Difference]: Finished difference Result 180 states and 420 transitions. [2020-10-09 10:36:08,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:08,574 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 12 [2020-10-09 10:36:08,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:08,576 INFO L225 Difference]: With dead ends: 180 [2020-10-09 10:36:08,576 INFO L226 Difference]: Without dead ends: 175 [2020-10-09 10:36:08,576 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=216, Invalid=434, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:36:08,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-09 10:36:08,578 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 114. [2020-10-09 10:36:08,578 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-09 10:36:08,579 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-09 10:36:08,579 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-09 10:36:08,579 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:08,579 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-09 10:36:08,579 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-09 10:36:08,579 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-09 10:36:08,579 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:08,579 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:08,580 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:08,780 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2020-10-09 10:36:08,780 INFO L429 AbstractCegarLoop]: === Iteration 69 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:08,781 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:08,781 INFO L82 PathProgramCache]: Analyzing trace with hash -655922238, now seen corresponding path program 5 times [2020-10-09 10:36:08,782 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:08,782 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [412129367] [2020-10-09 10:36:08,782 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:08,786 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:08,856 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:08,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [412129367] [2020-10-09 10:36:08,856 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2097576328] [2020-10-09 10:36:08,857 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 62 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:08,894 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:08,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:08,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:08,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:08,997 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:09,019 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,019 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:09,020 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-09 10:36:09,020 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1844485254] [2020-10-09 10:36:09,020 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 10:36:09,020 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:09,021 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 10:36:09,021 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:36:09,021 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 16 states. [2020-10-09 10:36:09,161 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:09,161 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-09 10:36:09,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:09,162 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 12 [2020-10-09 10:36:09,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:09,163 INFO L225 Difference]: With dead ends: 164 [2020-10-09 10:36:09,163 INFO L226 Difference]: Without dead ends: 159 [2020-10-09 10:36:09,164 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:36:09,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-09 10:36:09,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-09 10:36:09,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-09 10:36:09,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-09 10:36:09,166 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-09 10:36:09,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:09,167 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-09 10:36:09,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 10:36:09,167 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-09 10:36:09,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:09,167 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:09,168 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:09,368 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68,62 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:09,368 INFO L429 AbstractCegarLoop]: === Iteration 70 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:09,369 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:09,369 INFO L82 PathProgramCache]: Analyzing trace with hash 1940751883, now seen corresponding path program 15 times [2020-10-09 10:36:09,370 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:09,370 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [377606469] [2020-10-09 10:36:09,370 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:09,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:09,484 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [377606469] [2020-10-09 10:36:09,484 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1688392548] [2020-10-09 10:36:09,485 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 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 63 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:09,520 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:09,521 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:09,521 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:09,522 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:09,641 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,642 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:09,642 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:09,642 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2032899727] [2020-10-09 10:36:09,642 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:09,643 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:09,643 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:09,643 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:09,643 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 15 states. [2020-10-09 10:36:09,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:09,691 INFO L93 Difference]: Finished difference Result 156 states and 367 transitions. [2020-10-09 10:36:09,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:36:09,691 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:09,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:09,693 INFO L225 Difference]: With dead ends: 156 [2020-10-09 10:36:09,693 INFO L226 Difference]: Without dead ends: 153 [2020-10-09 10:36:09,693 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 18 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:09,694 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 153 states. [2020-10-09 10:36:09,697 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 153 to 129. [2020-10-09 10:36:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-09 10:36:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-09 10:36:09,697 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-09 10:36:09,698 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:09,698 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-09 10:36:09,698 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:09,698 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-09 10:36:09,698 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:09,698 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:09,698 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:09,899 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable69 [2020-10-09 10:36:09,899 INFO L429 AbstractCegarLoop]: === Iteration 71 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:09,900 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:09,900 INFO L82 PathProgramCache]: Analyzing trace with hash 1078904123, now seen corresponding path program 16 times [2020-10-09 10:36:09,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:09,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798767546] [2020-10-09 10:36:09,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:09,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:09,994 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:09,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798767546] [2020-10-09 10:36:09,995 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [542771654] [2020-10-09 10:36:09,995 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 64 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:10,031 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:10,031 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:10,032 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:10,032 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:10,152 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,152 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:10,153 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:10,153 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [835057251] [2020-10-09 10:36:10,153 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:10,153 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:10,153 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:10,153 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:10,154 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-09 10:36:10,225 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:10,225 INFO L93 Difference]: Finished difference Result 170 states and 394 transitions. [2020-10-09 10:36:10,226 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:10,226 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:10,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:10,228 INFO L225 Difference]: With dead ends: 170 [2020-10-09 10:36:10,228 INFO L226 Difference]: Without dead ends: 167 [2020-10-09 10:36:10,229 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:36:10,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-09 10:36:10,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-09 10:36:10,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-09 10:36:10,233 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 315 transitions. [2020-10-09 10:36:10,233 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 315 transitions. Word has length 12 [2020-10-09 10:36:10,235 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:10,235 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 315 transitions. [2020-10-09 10:36:10,235 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:10,235 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 315 transitions. [2020-10-09 10:36:10,236 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:10,236 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:10,236 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:10,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70,64 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:10,437 INFO L429 AbstractCegarLoop]: === Iteration 72 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:10,437 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:10,438 INFO L82 PathProgramCache]: Analyzing trace with hash 1743839243, now seen corresponding path program 17 times [2020-10-09 10:36:10,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:10,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1690009756] [2020-10-09 10:36:10,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:10,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:10,531 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1690009756] [2020-10-09 10:36:10,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1030745545] [2020-10-09 10:36:10,532 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 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 65 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:10,584 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:10,584 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:10,585 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:10,586 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:10,724 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:10,724 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:10,724 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:10,724 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708629838] [2020-10-09 10:36:10,725 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:10,725 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:10,725 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:10,725 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:10,725 INFO L87 Difference]: Start difference. First operand 129 states and 315 transitions. Second operand 15 states. [2020-10-09 10:36:10,810 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:10,810 INFO L93 Difference]: Finished difference Result 169 states and 394 transitions. [2020-10-09 10:36:10,810 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:10,811 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:10,811 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:10,812 INFO L225 Difference]: With dead ends: 169 [2020-10-09 10:36:10,812 INFO L226 Difference]: Without dead ends: 166 [2020-10-09 10:36:10,812 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:36:10,813 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2020-10-09 10:36:10,815 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 130. [2020-10-09 10:36:10,815 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-09 10:36:10,815 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 320 transitions. [2020-10-09 10:36:10,816 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 320 transitions. Word has length 12 [2020-10-09 10:36:10,816 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:10,816 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 320 transitions. [2020-10-09 10:36:10,816 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:10,816 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 320 transitions. [2020-10-09 10:36:10,817 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:10,817 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:10,817 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:11,025 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71,65 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:11,026 INFO L429 AbstractCegarLoop]: === Iteration 73 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:11,026 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:11,026 INFO L82 PathProgramCache]: Analyzing trace with hash 1765288763, now seen corresponding path program 18 times [2020-10-09 10:36:11,027 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:11,028 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [919180629] [2020-10-09 10:36:11,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:11,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:11,125 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [919180629] [2020-10-09 10:36:11,126 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [22488814] [2020-10-09 10:36:11,126 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 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 66 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:11,166 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:36:11,167 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:11,168 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:11,168 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:11,277 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,277 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:11,277 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:11,278 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [919856971] [2020-10-09 10:36:11,278 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:11,278 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:11,278 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:11,278 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:11,278 INFO L87 Difference]: Start difference. First operand 130 states and 320 transitions. Second operand 15 states. [2020-10-09 10:36:11,375 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:11,375 INFO L93 Difference]: Finished difference Result 168 states and 394 transitions. [2020-10-09 10:36:11,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:11,376 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:11,376 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:11,377 INFO L225 Difference]: With dead ends: 168 [2020-10-09 10:36:11,377 INFO L226 Difference]: Without dead ends: 165 [2020-10-09 10:36:11,378 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:36:11,378 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-09 10:36:11,381 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 132. [2020-10-09 10:36:11,381 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-09 10:36:11,381 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 327 transitions. [2020-10-09 10:36:11,382 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 327 transitions. Word has length 12 [2020-10-09 10:36:11,382 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:11,382 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 327 transitions. [2020-10-09 10:36:11,382 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:11,382 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 327 transitions. [2020-10-09 10:36:11,382 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:11,382 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:11,382 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:11,583 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 66 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable72 [2020-10-09 10:36:11,583 INFO L429 AbstractCegarLoop]: === Iteration 74 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:11,584 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:11,584 INFO L82 PathProgramCache]: Analyzing trace with hash 1765980683, now seen corresponding path program 19 times [2020-10-09 10:36:11,584 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:11,584 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1653846296] [2020-10-09 10:36:11,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:11,590 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:11,668 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1653846296] [2020-10-09 10:36:11,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612833103] [2020-10-09 10:36:11,668 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 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 67 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:11,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:11,708 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:11,709 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:11,819 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:11,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:11,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:11,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558721981] [2020-10-09 10:36:11,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:11,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:11,821 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:11,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:11,821 INFO L87 Difference]: Start difference. First operand 132 states and 327 transitions. Second operand 15 states. [2020-10-09 10:36:11,955 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:11,955 INFO L93 Difference]: Finished difference Result 167 states and 394 transitions. [2020-10-09 10:36:11,956 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:11,956 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:11,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:11,958 INFO L225 Difference]: With dead ends: 167 [2020-10-09 10:36:11,958 INFO L226 Difference]: Without dead ends: 164 [2020-10-09 10:36:11,958 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:36:11,959 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2020-10-09 10:36:11,961 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 134. [2020-10-09 10:36:11,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-09 10:36:11,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 334 transitions. [2020-10-09 10:36:11,962 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 334 transitions. Word has length 12 [2020-10-09 10:36:11,962 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:11,962 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 334 transitions. [2020-10-09 10:36:11,962 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:11,962 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 334 transitions. [2020-10-09 10:36:11,963 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-09 10:36:11,963 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:11,963 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:12,173 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73,67 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:12,174 INFO L429 AbstractCegarLoop]: === Iteration 75 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:12,174 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:12,174 INFO L82 PathProgramCache]: Analyzing trace with hash 1766003003, now seen corresponding path program 20 times [2020-10-09 10:36:12,174 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:12,175 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876522514] [2020-10-09 10:36:12,175 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:12,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:12,247 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:12,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876522514] [2020-10-09 10:36:12,247 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1539163676] [2020-10-09 10:36:12,247 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 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 68 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:12,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:12,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:12,283 INFO L263 TraceCheckSpWp]: Trace formula consists of 83 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:12,284 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:12,387 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:12,399 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:12,400 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:12,400 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:12,400 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689901061] [2020-10-09 10:36:12,400 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:12,400 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:12,400 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:12,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:12,401 INFO L87 Difference]: Start difference. First operand 134 states and 334 transitions. Second operand 15 states. [2020-10-09 10:36:12,627 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:12,627 INFO L93 Difference]: Finished difference Result 176 states and 418 transitions. [2020-10-09 10:36:12,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:12,628 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 12 [2020-10-09 10:36:12,629 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:12,630 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:36:12,630 INFO L226 Difference]: Without dead ends: 170 [2020-10-09 10:36:12,631 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:12,631 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-09 10:36:12,634 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 132. [2020-10-09 10:36:12,634 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-09 10:36:12,635 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-09 10:36:12,635 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-09 10:36:12,636 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:12,636 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-09 10:36:12,636 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:12,636 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-09 10:36:12,637 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:12,637 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:12,637 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:12,838 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74,68 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:12,838 INFO L429 AbstractCegarLoop]: === Iteration 76 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:12,838 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:12,838 INFO L82 PathProgramCache]: Analyzing trace with hash -1530333459, now seen corresponding path program 50 times [2020-10-09 10:36:12,839 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:12,839 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1741182978] [2020-10-09 10:36:12,839 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:12,846 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:12,980 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:12,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1741182978] [2020-10-09 10:36:12,981 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [804993531] [2020-10-09 10:36:12,981 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 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 69 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:13,045 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:13,046 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:13,047 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:13,048 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:13,214 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:13,215 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:13,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2043118075] [2020-10-09 10:36:13,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:13,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:13,216 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:13,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:13,220 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 15 states. [2020-10-09 10:36:13,290 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:13,291 INFO L93 Difference]: Finished difference Result 163 states and 394 transitions. [2020-10-09 10:36:13,291 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-09 10:36:13,292 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:13,292 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:13,293 INFO L225 Difference]: With dead ends: 163 [2020-10-09 10:36:13,293 INFO L226 Difference]: Without dead ends: 161 [2020-10-09 10:36:13,294 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:13,294 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 161 states. [2020-10-09 10:36:13,297 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 161 to 138. [2020-10-09 10:36:13,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-09 10:36:13,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 350 transitions. [2020-10-09 10:36:13,299 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 350 transitions. Word has length 13 [2020-10-09 10:36:13,299 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:13,299 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 350 transitions. [2020-10-09 10:36:13,299 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:13,299 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 350 transitions. [2020-10-09 10:36:13,300 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:13,300 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:13,300 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:13,512 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 69 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable75 [2020-10-09 10:36:13,512 INFO L429 AbstractCegarLoop]: === Iteration 77 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:13,513 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:13,513 INFO L82 PathProgramCache]: Analyzing trace with hash -1530332498, now seen corresponding path program 51 times [2020-10-09 10:36:13,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:13,514 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1351184379] [2020-10-09 10:36:13,514 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:13,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:13,598 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1351184379] [2020-10-09 10:36:13,599 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1855608403] [2020-10-09 10:36:13,599 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 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 70 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:13,637 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:13,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:13,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:13,638 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:13,762 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:13,763 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:13,763 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:13,763 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [604833685] [2020-10-09 10:36:13,764 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:13,764 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:13,764 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:13,764 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:13,764 INFO L87 Difference]: Start difference. First operand 138 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:13,897 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:13,897 INFO L93 Difference]: Finished difference Result 172 states and 412 transitions. [2020-10-09 10:36:13,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:13,898 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:13,898 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:13,899 INFO L225 Difference]: With dead ends: 172 [2020-10-09 10:36:13,900 INFO L226 Difference]: Without dead ends: 170 [2020-10-09 10:36:13,900 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=115, Invalid=227, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:36:13,900 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-09 10:36:13,902 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 136. [2020-10-09 10:36:13,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:13,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-09 10:36:13,902 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-09 10:36:13,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:13,903 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-09 10:36:13,903 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:13,903 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-09 10:36:13,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:13,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:13,904 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:14,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76,70 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:14,112 INFO L429 AbstractCegarLoop]: === Iteration 78 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:14,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:14,112 INFO L82 PathProgramCache]: Analyzing trace with hash -1530303668, now seen corresponding path program 52 times [2020-10-09 10:36:14,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:14,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1034276747] [2020-10-09 10:36:14,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:14,118 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:14,189 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:14,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1034276747] [2020-10-09 10:36:14,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [417432397] [2020-10-09 10:36:14,190 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 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 71 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:14,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:14,230 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:14,231 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:14,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:14,657 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:14,658 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:14,658 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:14,658 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [421674715] [2020-10-09 10:36:14,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:14,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:14,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:14,659 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=141, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:14,659 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-09 10:36:14,873 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:14,874 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-09 10:36:14,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:14,874 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:14,874 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:14,875 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:14,875 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:14,876 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=132, Invalid=248, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:14,876 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:14,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 134. [2020-10-09 10:36:14,879 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-09 10:36:14,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 338 transitions. [2020-10-09 10:36:14,879 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 338 transitions. Word has length 13 [2020-10-09 10:36:14,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:14,879 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 338 transitions. [2020-10-09 10:36:14,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:14,880 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 338 transitions. [2020-10-09 10:36:14,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:14,880 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:14,880 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:15,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 71 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable77 [2020-10-09 10:36:15,088 INFO L429 AbstractCegarLoop]: === Iteration 79 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:15,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:15,088 INFO L82 PathProgramCache]: Analyzing trace with hash -1529409938, now seen corresponding path program 53 times [2020-10-09 10:36:15,089 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:15,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403152299] [2020-10-09 10:36:15,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:15,094 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:15,165 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403152299] [2020-10-09 10:36:15,165 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [511224431] [2020-10-09 10:36:15,166 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 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 72 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:15,203 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:15,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:15,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:15,204 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:15,314 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,315 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:15,315 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:15,315 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1100489470] [2020-10-09 10:36:15,315 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:15,315 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:15,316 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:15,316 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:15,316 INFO L87 Difference]: Start difference. First operand 134 states and 338 transitions. Second operand 15 states. [2020-10-09 10:36:15,494 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:15,494 INFO L93 Difference]: Finished difference Result 179 states and 426 transitions. [2020-10-09 10:36:15,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:15,495 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:15,495 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:15,496 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:15,496 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:15,497 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 90 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=141, Invalid=279, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:15,497 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:15,499 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 136. [2020-10-09 10:36:15,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:15,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 344 transitions. [2020-10-09 10:36:15,500 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 344 transitions. Word has length 13 [2020-10-09 10:36:15,500 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:15,500 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 344 transitions. [2020-10-09 10:36:15,500 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:15,500 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 344 transitions. [2020-10-09 10:36:15,501 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:15,501 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:15,501 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:15,706 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 72 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable78 [2020-10-09 10:36:15,707 INFO L429 AbstractCegarLoop]: === Iteration 80 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:15,707 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:15,707 INFO L82 PathProgramCache]: Analyzing trace with hash -1529408977, now seen corresponding path program 54 times [2020-10-09 10:36:15,708 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:15,708 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [69641610] [2020-10-09 10:36:15,708 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:15,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:15,783 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [69641610] [2020-10-09 10:36:15,783 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1301678629] [2020-10-09 10:36:15,783 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 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 73 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:15,820 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:15,821 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:15,821 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:15,822 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:15,918 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:15,918 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:15,919 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:15,919 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [154762718] [2020-10-09 10:36:15,919 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:15,919 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:15,919 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:15,920 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:15,920 INFO L87 Difference]: Start difference. First operand 136 states and 344 transitions. Second operand 15 states. [2020-10-09 10:36:16,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:16,113 INFO L93 Difference]: Finished difference Result 184 states and 436 transitions. [2020-10-09 10:36:16,114 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:16,114 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:16,114 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:16,115 INFO L225 Difference]: With dead ends: 184 [2020-10-09 10:36:16,115 INFO L226 Difference]: Without dead ends: 182 [2020-10-09 10:36:16,116 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:16,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 182 states. [2020-10-09 10:36:16,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 182 to 136. [2020-10-09 10:36:16,119 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:36:16,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 342 transitions. [2020-10-09 10:36:16,119 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 342 transitions. Word has length 13 [2020-10-09 10:36:16,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:16,119 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 342 transitions. [2020-10-09 10:36:16,120 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:16,120 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 342 transitions. [2020-10-09 10:36:16,120 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:16,120 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:16,120 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:16,328 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 73 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable79 [2020-10-09 10:36:16,329 INFO L429 AbstractCegarLoop]: === Iteration 81 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:16,329 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:16,329 INFO L82 PathProgramCache]: Analyzing trace with hash -1529380147, now seen corresponding path program 55 times [2020-10-09 10:36:16,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:16,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183246194] [2020-10-09 10:36:16,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:16,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:16,406 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:16,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183246194] [2020-10-09 10:36:16,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [545311304] [2020-10-09 10:36:16,407 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 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 74 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:16,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:16,443 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:16,443 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:16,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:16,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:16,561 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:16,561 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [403041606] [2020-10-09 10:36:16,561 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:16,561 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:16,562 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:16,562 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:16,562 INFO L87 Difference]: Start difference. First operand 136 states and 342 transitions. Second operand 15 states. [2020-10-09 10:36:16,775 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:16,776 INFO L93 Difference]: Finished difference Result 179 states and 427 transitions. [2020-10-09 10:36:16,776 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:16,776 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:16,777 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:16,778 INFO L225 Difference]: With dead ends: 179 [2020-10-09 10:36:16,778 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:36:16,778 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:16,779 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:36:16,781 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 135. [2020-10-09 10:36:16,781 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-09 10:36:16,781 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-09 10:36:16,781 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-09 10:36:16,781 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:16,781 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-09 10:36:16,781 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:16,782 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-09 10:36:16,782 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:16,782 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:16,782 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:16,982 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80,74 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:16,983 INFO L429 AbstractCegarLoop]: === Iteration 82 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:16,983 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:16,983 INFO L82 PathProgramCache]: Analyzing trace with hash -1501704308, now seen corresponding path program 56 times [2020-10-09 10:36:16,984 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:16,984 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1131605101] [2020-10-09 10:36:16,984 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:16,990 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:17,071 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1131605101] [2020-10-09 10:36:17,072 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1370142945] [2020-10-09 10:36:17,072 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 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 75 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:17,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:17,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:17,109 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:17,110 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:17,218 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,218 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:17,218 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:17,219 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [658330449] [2020-10-09 10:36:17,219 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:17,219 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:17,219 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:17,220 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:17,220 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 15 states. [2020-10-09 10:36:17,381 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:17,381 INFO L93 Difference]: Finished difference Result 176 states and 421 transitions. [2020-10-09 10:36:17,381 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:17,382 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:17,382 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:17,383 INFO L225 Difference]: With dead ends: 176 [2020-10-09 10:36:17,383 INFO L226 Difference]: Without dead ends: 174 [2020-10-09 10:36:17,384 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:17,384 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 174 states. [2020-10-09 10:36:17,386 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 174 to 139. [2020-10-09 10:36:17,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:36:17,387 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 350 transitions. [2020-10-09 10:36:17,387 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 350 transitions. Word has length 13 [2020-10-09 10:36:17,387 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:17,387 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 350 transitions. [2020-10-09 10:36:17,387 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:17,387 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 350 transitions. [2020-10-09 10:36:17,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:17,387 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:17,387 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:17,588 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81,75 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:17,588 INFO L429 AbstractCegarLoop]: === Iteration 83 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:17,589 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:17,589 INFO L82 PathProgramCache]: Analyzing trace with hash -1501703347, now seen corresponding path program 57 times [2020-10-09 10:36:17,589 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:17,589 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1342104975] [2020-10-09 10:36:17,590 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:17,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:17,669 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1342104975] [2020-10-09 10:36:17,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1917284737] [2020-10-09 10:36:17,670 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 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 76 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:17,706 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:36:17,707 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:17,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:17,708 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:17,820 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:17,821 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:17,821 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:17,821 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1663051256] [2020-10-09 10:36:17,822 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:17,822 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:17,822 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:17,822 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:17,822 INFO L87 Difference]: Start difference. First operand 139 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:18,038 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:18,038 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-09 10:36:18,039 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:18,039 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:18,039 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:18,040 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:18,040 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:18,041 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 96 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=143, Invalid=277, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:18,041 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:18,043 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 140. [2020-10-09 10:36:18,044 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:18,044 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 352 transitions. [2020-10-09 10:36:18,044 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 352 transitions. Word has length 13 [2020-10-09 10:36:18,044 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:18,044 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 352 transitions. [2020-10-09 10:36:18,044 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:18,044 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 352 transitions. [2020-10-09 10:36:18,045 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:18,045 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:18,045 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:18,246 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82,76 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:18,246 INFO L429 AbstractCegarLoop]: === Iteration 84 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:18,247 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:18,247 INFO L82 PathProgramCache]: Analyzing trace with hash -1501674517, now seen corresponding path program 58 times [2020-10-09 10:36:18,247 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:18,248 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [3956634] [2020-10-09 10:36:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:18,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:18,340 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:18,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [3956634] [2020-10-09 10:36:18,341 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1108911265] [2020-10-09 10:36:18,341 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 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 77 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:18,377 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:18,377 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:18,378 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:18,379 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:18,479 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:18,479 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:18,479 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:18,479 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002656076] [2020-10-09 10:36:18,480 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:18,480 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:18,480 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:18,480 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=144, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:18,480 INFO L87 Difference]: Start difference. First operand 140 states and 352 transitions. Second operand 15 states. [2020-10-09 10:36:18,670 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:18,670 INFO L93 Difference]: Finished difference Result 185 states and 439 transitions. [2020-10-09 10:36:18,670 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:18,670 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:18,671 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:18,672 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:18,672 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:18,672 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=142, Invalid=278, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:18,673 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:18,675 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 138. [2020-10-09 10:36:18,675 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 138 states. [2020-10-09 10:36:18,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 138 states to 138 states and 345 transitions. [2020-10-09 10:36:18,676 INFO L78 Accepts]: Start accepts. Automaton has 138 states and 345 transitions. Word has length 13 [2020-10-09 10:36:18,676 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:18,676 INFO L481 AbstractCegarLoop]: Abstraction has 138 states and 345 transitions. [2020-10-09 10:36:18,676 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:18,676 INFO L276 IsEmpty]: Start isEmpty. Operand 138 states and 345 transitions. [2020-10-09 10:36:18,677 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:18,677 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:18,677 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:18,877 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83,77 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:18,878 INFO L429 AbstractCegarLoop]: === Iteration 85 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:18,878 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:18,879 INFO L82 PathProgramCache]: Analyzing trace with hash 1043911547, now seen corresponding path program 59 times [2020-10-09 10:36:18,879 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:18,879 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1347744824] [2020-10-09 10:36:18,879 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:18,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:19,013 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,013 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1347744824] [2020-10-09 10:36:19,014 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1900657110] [2020-10-09 10:36:19,014 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 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 78 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:19,060 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:19,060 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:19,061 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:19,061 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:19,163 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,163 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:19,163 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:19,163 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [416211169] [2020-10-09 10:36:19,164 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:19,164 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:19,164 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:19,164 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:19,164 INFO L87 Difference]: Start difference. First operand 138 states and 345 transitions. Second operand 15 states. [2020-10-09 10:36:19,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:19,219 INFO L93 Difference]: Finished difference Result 182 states and 432 transitions. [2020-10-09 10:36:19,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:36:19,220 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:19,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:19,221 INFO L225 Difference]: With dead ends: 182 [2020-10-09 10:36:19,221 INFO L226 Difference]: Without dead ends: 180 [2020-10-09 10:36:19,222 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=73, Invalid=167, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:36:19,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-09 10:36:19,225 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 144. [2020-10-09 10:36:19,225 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:36:19,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 363 transitions. [2020-10-09 10:36:19,225 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 363 transitions. Word has length 13 [2020-10-09 10:36:19,226 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:19,226 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 363 transitions. [2020-10-09 10:36:19,226 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:19,226 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 363 transitions. [2020-10-09 10:36:19,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:19,226 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:19,226 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:19,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 78 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable84 [2020-10-09 10:36:19,427 INFO L429 AbstractCegarLoop]: === Iteration 86 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:19,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:19,428 INFO L82 PathProgramCache]: Analyzing trace with hash 1043912508, now seen corresponding path program 60 times [2020-10-09 10:36:19,428 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:19,428 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403382169] [2020-10-09 10:36:19,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:19,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:19,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403382169] [2020-10-09 10:36:19,530 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [469264218] [2020-10-09 10:36:19,530 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 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 79 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:19,593 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:19,594 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:19,595 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:19,596 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:19,726 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:19,727 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:19,727 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:19,727 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1904141526] [2020-10-09 10:36:19,727 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:19,727 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:19,728 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:19,728 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:19,728 INFO L87 Difference]: Start difference. First operand 144 states and 363 transitions. Second operand 15 states. [2020-10-09 10:36:19,891 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:19,891 INFO L93 Difference]: Finished difference Result 185 states and 437 transitions. [2020-10-09 10:36:19,892 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:19,892 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:19,892 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:19,894 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:36:19,894 INFO L226 Difference]: Without dead ends: 183 [2020-10-09 10:36:19,894 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:36:19,895 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 183 states. [2020-10-09 10:36:19,897 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 183 to 142. [2020-10-09 10:36:19,897 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:19,897 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-09 10:36:19,897 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-09 10:36:19,898 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:19,898 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-09 10:36:19,898 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:19,898 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-09 10:36:19,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:19,898 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:19,898 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:20,099 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85,79 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:20,099 INFO L429 AbstractCegarLoop]: === Iteration 87 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:20,100 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:20,100 INFO L82 PathProgramCache]: Analyzing trace with hash 1043941338, now seen corresponding path program 61 times [2020-10-09 10:36:20,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:20,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1051520312] [2020-10-09 10:36:20,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:20,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:20,187 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:20,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1051520312] [2020-10-09 10:36:20,187 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1566815260] [2020-10-09 10:36:20,188 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 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 80 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:20,239 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:20,240 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:20,240 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:20,863 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:20,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:20,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:20,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1988884309] [2020-10-09 10:36:20,864 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:20,864 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:20,864 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:20,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:20,865 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:21,088 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:21,089 INFO L93 Difference]: Finished difference Result 191 states and 449 transitions. [2020-10-09 10:36:21,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:21,089 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:21,089 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:21,090 INFO L225 Difference]: With dead ends: 191 [2020-10-09 10:36:21,090 INFO L226 Difference]: Without dead ends: 189 [2020-10-09 10:36:21,090 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=138, Invalid=282, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:21,091 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 189 states. [2020-10-09 10:36:21,092 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 189 to 140. [2020-10-09 10:36:21,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:21,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 351 transitions. [2020-10-09 10:36:21,093 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 351 transitions. Word has length 13 [2020-10-09 10:36:21,093 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:21,094 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 351 transitions. [2020-10-09 10:36:21,094 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:21,094 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 351 transitions. [2020-10-09 10:36:21,094 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:21,094 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:21,094 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:21,303 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86,80 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:21,304 INFO L429 AbstractCegarLoop]: === Iteration 88 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:21,304 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:21,304 INFO L82 PathProgramCache]: Analyzing trace with hash 1044835068, now seen corresponding path program 62 times [2020-10-09 10:36:21,304 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:21,305 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1248267488] [2020-10-09 10:36:21,305 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:21,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:21,382 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:21,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1248267488] [2020-10-09 10:36:21,383 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [265641182] [2020-10-09 10:36:21,383 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 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 81 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:21,420 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:21,421 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:21,421 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:21,422 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:21,539 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:21,540 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:21,540 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:21,540 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1502122910] [2020-10-09 10:36:21,540 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:21,541 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:21,541 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:21,541 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:21,541 INFO L87 Difference]: Start difference. First operand 140 states and 351 transitions. Second operand 15 states. [2020-10-09 10:36:21,772 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:21,772 INFO L93 Difference]: Finished difference Result 187 states and 441 transitions. [2020-10-09 10:36:21,773 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:21,773 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:21,773 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:21,775 INFO L225 Difference]: With dead ends: 187 [2020-10-09 10:36:21,775 INFO L226 Difference]: Without dead ends: 185 [2020-10-09 10:36:21,775 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=158, Invalid=348, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:21,776 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-09 10:36:21,779 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 142. [2020-10-09 10:36:21,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:21,779 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 357 transitions. [2020-10-09 10:36:21,779 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 357 transitions. Word has length 13 [2020-10-09 10:36:21,780 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:21,780 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 357 transitions. [2020-10-09 10:36:21,780 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:21,780 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 357 transitions. [2020-10-09 10:36:21,780 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:21,780 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:21,781 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:21,981 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 81 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable87 [2020-10-09 10:36:21,981 INFO L429 AbstractCegarLoop]: === Iteration 89 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:21,982 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:21,982 INFO L82 PathProgramCache]: Analyzing trace with hash 1044836029, now seen corresponding path program 63 times [2020-10-09 10:36:21,982 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:21,983 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [969817971] [2020-10-09 10:36:21,983 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:21,987 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:22,065 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [969817971] [2020-10-09 10:36:22,066 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1601277008] [2020-10-09 10:36:22,066 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 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 82 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:22,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:22,112 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:22,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:22,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:22,224 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:22,225 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:22,225 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:22,225 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [532058311] [2020-10-09 10:36:22,225 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:22,226 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:22,226 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:22,226 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:22,226 INFO L87 Difference]: Start difference. First operand 142 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:22,464 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:22,464 INFO L93 Difference]: Finished difference Result 198 states and 463 transitions. [2020-10-09 10:36:22,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:22,465 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:22,465 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:22,466 INFO L225 Difference]: With dead ends: 198 [2020-10-09 10:36:22,467 INFO L226 Difference]: Without dead ends: 196 [2020-10-09 10:36:22,467 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:22,467 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-09 10:36:22,469 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 142. [2020-10-09 10:36:22,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:22,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 356 transitions. [2020-10-09 10:36:22,470 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 356 transitions. Word has length 13 [2020-10-09 10:36:22,470 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:22,470 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 356 transitions. [2020-10-09 10:36:22,470 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:22,470 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 356 transitions. [2020-10-09 10:36:22,470 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:22,470 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:22,471 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:22,671 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88,82 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:22,671 INFO L429 AbstractCegarLoop]: === Iteration 90 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:22,672 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:22,672 INFO L82 PathProgramCache]: Analyzing trace with hash 1044864859, now seen corresponding path program 64 times [2020-10-09 10:36:22,672 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:22,672 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2122404848] [2020-10-09 10:36:22,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:22,676 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:22,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:22,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2122404848] [2020-10-09 10:36:22,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1405841933] [2020-10-09 10:36:22,752 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 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 83 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:22,792 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:22,792 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:22,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:22,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:22,908 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:22,908 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:22,908 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:22,908 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329566914] [2020-10-09 10:36:22,909 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:22,909 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:22,909 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:22,909 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:22,910 INFO L87 Difference]: Start difference. First operand 142 states and 356 transitions. Second operand 15 states. [2020-10-09 10:36:23,174 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:23,175 INFO L93 Difference]: Finished difference Result 189 states and 446 transitions. [2020-10-09 10:36:23,175 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:23,175 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:23,176 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:23,177 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:36:23,177 INFO L226 Difference]: Without dead ends: 187 [2020-10-09 10:36:23,177 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:23,178 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-09 10:36:23,180 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 139. [2020-10-09 10:36:23,180 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:36:23,180 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 347 transitions. [2020-10-09 10:36:23,180 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 347 transitions. Word has length 13 [2020-10-09 10:36:23,181 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:23,181 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 347 transitions. [2020-10-09 10:36:23,181 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:23,181 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 347 transitions. [2020-10-09 10:36:23,181 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:23,181 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:23,181 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:23,382 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 83 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable89 [2020-10-09 10:36:23,382 INFO L429 AbstractCegarLoop]: === Iteration 91 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:23,383 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:23,383 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141037, now seen corresponding path program 65 times [2020-10-09 10:36:23,383 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:23,383 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1204734397] [2020-10-09 10:36:23,384 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:23,388 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:23,485 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:23,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1204734397] [2020-10-09 10:36:23,486 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1448568883] [2020-10-09 10:36:23,486 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 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 84 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:23,523 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:23,523 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:23,524 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:23,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:23,637 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:23,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:23,637 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:23,637 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1077826081] [2020-10-09 10:36:23,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:23,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:23,638 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:23,638 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:23,638 INFO L87 Difference]: Start difference. First operand 139 states and 347 transitions. Second operand 15 states. [2020-10-09 10:36:23,727 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:23,728 INFO L93 Difference]: Finished difference Result 178 states and 423 transitions. [2020-10-09 10:36:23,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:36:23,728 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:23,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:23,730 INFO L225 Difference]: With dead ends: 178 [2020-10-09 10:36:23,730 INFO L226 Difference]: Without dead ends: 176 [2020-10-09 10:36:23,731 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:36:23,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 176 states. [2020-10-09 10:36:23,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 176 to 143. [2020-10-09 10:36:23,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:23,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 359 transitions. [2020-10-09 10:36:23,734 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 359 transitions. Word has length 13 [2020-10-09 10:36:23,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:23,734 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 359 transitions. [2020-10-09 10:36:23,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:23,734 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 359 transitions. [2020-10-09 10:36:23,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:23,735 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:23,735 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:23,935 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90,84 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:23,936 INFO L429 AbstractCegarLoop]: === Iteration 92 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:23,936 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:23,936 INFO L82 PathProgramCache]: Analyzing trace with hash 1681141998, now seen corresponding path program 66 times [2020-10-09 10:36:23,936 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:23,937 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143045633] [2020-10-09 10:36:23,937 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:23,941 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:24,025 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:24,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143045633] [2020-10-09 10:36:24,026 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [961160071] [2020-10-09 10:36:24,026 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 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 85 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:24,063 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:24,064 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:24,064 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:24,065 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:24,188 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:24,189 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:24,189 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:24,189 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1997996050] [2020-10-09 10:36:24,189 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:24,190 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:24,190 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:24,190 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:24,190 INFO L87 Difference]: Start difference. First operand 143 states and 359 transitions. Second operand 15 states. [2020-10-09 10:36:24,379 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:24,379 INFO L93 Difference]: Finished difference Result 193 states and 452 transitions. [2020-10-09 10:36:24,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:24,380 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:24,380 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:24,382 INFO L225 Difference]: With dead ends: 193 [2020-10-09 10:36:24,382 INFO L226 Difference]: Without dead ends: 191 [2020-10-09 10:36:24,382 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=133, Invalid=287, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:36:24,383 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-09 10:36:24,385 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 141. [2020-10-09 10:36:24,386 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:24,386 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 353 transitions. [2020-10-09 10:36:24,386 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 353 transitions. Word has length 13 [2020-10-09 10:36:24,386 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:24,386 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 353 transitions. [2020-10-09 10:36:24,386 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:24,387 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 353 transitions. [2020-10-09 10:36:24,387 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:24,387 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:24,387 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:24,594 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 85 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable91 [2020-10-09 10:36:24,595 INFO L429 AbstractCegarLoop]: === Iteration 93 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:24,595 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:24,595 INFO L82 PathProgramCache]: Analyzing trace with hash 1681170828, now seen corresponding path program 67 times [2020-10-09 10:36:24,596 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:24,596 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213856047] [2020-10-09 10:36:24,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:24,601 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:24,675 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:24,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213856047] [2020-10-09 10:36:24,676 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [445667371] [2020-10-09 10:36:24,676 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 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 86 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:24,729 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:24,731 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:24,732 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:24,904 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:24,905 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:24,905 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:24,905 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250252518] [2020-10-09 10:36:24,905 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:24,906 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:24,906 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:24,906 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:24,906 INFO L87 Difference]: Start difference. First operand 141 states and 353 transitions. Second operand 15 states. [2020-10-09 10:36:25,150 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:25,151 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-09 10:36:25,151 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:25,151 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:25,152 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:25,153 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:36:25,153 INFO L226 Difference]: Without dead ends: 193 [2020-10-09 10:36:25,153 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=146, Invalid=316, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:36:25,154 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-09 10:36:25,157 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 140. [2020-10-09 10:36:25,157 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:36:25,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 349 transitions. [2020-10-09 10:36:25,157 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 349 transitions. Word has length 13 [2020-10-09 10:36:25,157 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:25,158 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 349 transitions. [2020-10-09 10:36:25,158 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:25,158 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 349 transitions. [2020-10-09 10:36:25,158 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:25,158 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:25,158 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:25,367 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92,86 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:25,368 INFO L429 AbstractCegarLoop]: === Iteration 94 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:25,368 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:25,368 INFO L82 PathProgramCache]: Analyzing trace with hash 1701696827, now seen corresponding path program 68 times [2020-10-09 10:36:25,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:25,369 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176904380] [2020-10-09 10:36:25,369 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:25,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:25,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:25,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176904380] [2020-10-09 10:36:25,468 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1201035395] [2020-10-09 10:36:25,468 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 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 87 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:25,517 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:25,517 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:25,518 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:25,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:25,630 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:25,630 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:25,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:25,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1570935306] [2020-10-09 10:36:25,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:25,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:25,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:25,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:25,632 INFO L87 Difference]: Start difference. First operand 140 states and 349 transitions. Second operand 15 states. [2020-10-09 10:36:25,732 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:25,732 INFO L93 Difference]: Finished difference Result 174 states and 414 transitions. [2020-10-09 10:36:25,733 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:36:25,733 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:25,733 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:25,734 INFO L225 Difference]: With dead ends: 174 [2020-10-09 10:36:25,735 INFO L226 Difference]: Without dead ends: 172 [2020-10-09 10:36:25,735 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 57 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=96, Invalid=210, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:36:25,735 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2020-10-09 10:36:25,738 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 142. [2020-10-09 10:36:25,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:36:25,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 355 transitions. [2020-10-09 10:36:25,738 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 355 transitions. Word has length 13 [2020-10-09 10:36:25,739 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:25,739 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 355 transitions. [2020-10-09 10:36:25,739 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:25,739 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 355 transitions. [2020-10-09 10:36:25,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:25,739 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:25,740 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:25,949 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 87 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable93 [2020-10-09 10:36:25,949 INFO L429 AbstractCegarLoop]: === Iteration 95 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:25,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:25,950 INFO L82 PathProgramCache]: Analyzing trace with hash 1701697788, now seen corresponding path program 69 times [2020-10-09 10:36:25,950 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:25,950 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1386570234] [2020-10-09 10:36:25,950 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:26,031 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:26,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1386570234] [2020-10-09 10:36:26,032 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1846152575] [2020-10-09 10:36:26,032 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 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 88 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:26,069 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:26,069 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:26,070 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:26,070 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:26,194 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:26,194 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:26,194 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:26,195 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [461541340] [2020-10-09 10:36:26,195 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:26,195 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:26,195 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:26,196 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:26,196 INFO L87 Difference]: Start difference. First operand 142 states and 355 transitions. Second operand 15 states. [2020-10-09 10:36:26,430 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:26,431 INFO L93 Difference]: Finished difference Result 189 states and 443 transitions. [2020-10-09 10:36:26,431 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:36:26,431 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:26,431 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:26,433 INFO L225 Difference]: With dead ends: 189 [2020-10-09 10:36:26,433 INFO L226 Difference]: Without dead ends: 187 [2020-10-09 10:36:26,433 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 86 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:36:26,434 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-09 10:36:26,435 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 141. [2020-10-09 10:36:26,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:26,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 351 transitions. [2020-10-09 10:36:26,436 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 351 transitions. Word has length 13 [2020-10-09 10:36:26,436 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:26,436 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 351 transitions. [2020-10-09 10:36:26,436 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:26,436 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 351 transitions. [2020-10-09 10:36:26,437 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:26,437 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:26,437 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:26,642 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94,88 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:26,643 INFO L429 AbstractCegarLoop]: === Iteration 96 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:26,643 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:26,643 INFO L82 PathProgramCache]: Analyzing trace with hash 1702359917, now seen corresponding path program 70 times [2020-10-09 10:36:26,643 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:26,644 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2107146735] [2020-10-09 10:36:26,644 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:26,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:26,725 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:26,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2107146735] [2020-10-09 10:36:26,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192602747] [2020-10-09 10:36:26,726 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 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 89 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:26,765 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:26,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:26,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:26,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:26,883 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:26,883 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:26,883 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:26,884 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [586856156] [2020-10-09 10:36:26,884 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:26,884 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:26,884 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:26,885 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:26,885 INFO L87 Difference]: Start difference. First operand 141 states and 351 transitions. Second operand 15 states. [2020-10-09 10:36:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:27,022 INFO L93 Difference]: Finished difference Result 175 states and 413 transitions. [2020-10-09 10:36:27,022 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:36:27,023 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:27,023 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:27,024 INFO L225 Difference]: With dead ends: 175 [2020-10-09 10:36:27,024 INFO L226 Difference]: Without dead ends: 173 [2020-10-09 10:36:27,025 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:36:27,025 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 173 states. [2020-10-09 10:36:27,027 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 173 to 145. [2020-10-09 10:36:27,027 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:27,028 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:27,028 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:27,028 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:27,028 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:27,028 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:27,028 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:27,029 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:27,029 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:27,029 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:27,229 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95,89 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:27,230 INFO L429 AbstractCegarLoop]: === Iteration 97 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:27,230 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:27,230 INFO L82 PathProgramCache]: Analyzing trace with hash 1702382237, now seen corresponding path program 71 times [2020-10-09 10:36:27,231 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:27,231 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1616081791] [2020-10-09 10:36:27,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:27,235 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:27,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:27,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1616081791] [2020-10-09 10:36:27,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [325926337] [2020-10-09 10:36:27,304 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 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 90 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:27,341 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:27,341 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:27,342 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:27,343 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:27,448 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:27,480 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:27,480 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:27,480 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:27,480 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1966375652] [2020-10-09 10:36:27,481 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:27,481 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:27,481 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:27,481 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:27,481 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:27,822 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:27,822 INFO L93 Difference]: Finished difference Result 195 states and 464 transitions. [2020-10-09 10:36:27,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:27,823 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:27,823 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:27,825 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:36:27,825 INFO L226 Difference]: Without dead ends: 190 [2020-10-09 10:36:27,825 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:36:27,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-09 10:36:27,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 143. [2020-10-09 10:36:27,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:27,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-09 10:36:27,828 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-09 10:36:27,828 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:27,828 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-09 10:36:27,828 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:27,828 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-09 10:36:27,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:27,829 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:27,829 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:28,029 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96,90 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:28,030 INFO L429 AbstractCegarLoop]: === Iteration 98 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:28,030 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:28,030 INFO L82 PathProgramCache]: Analyzing trace with hash 1702389708, now seen corresponding path program 72 times [2020-10-09 10:36:28,033 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:28,033 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [311556640] [2020-10-09 10:36:28,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:28,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:28,108 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:28,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [311556640] [2020-10-09 10:36:28,109 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [622681007] [2020-10-09 10:36:28,109 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 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 91 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:28,149 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:28,149 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:28,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:28,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:28,284 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:28,285 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:28,285 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:28,285 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2138825624] [2020-10-09 10:36:28,285 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:28,285 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:28,286 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:28,286 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=153, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:28,286 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:28,551 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:28,551 INFO L93 Difference]: Finished difference Result 187 states and 442 transitions. [2020-10-09 10:36:28,552 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:36:28,552 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:28,552 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:28,553 INFO L225 Difference]: With dead ends: 187 [2020-10-09 10:36:28,553 INFO L226 Difference]: Without dead ends: 185 [2020-10-09 10:36:28,553 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:28,554 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 185 states. [2020-10-09 10:36:28,555 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 185 to 145. [2020-10-09 10:36:28,555 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:28,556 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:28,556 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:28,556 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:28,556 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:28,556 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:28,556 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:28,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:28,557 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:28,557 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:28,757 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97,91 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:28,757 INFO L429 AbstractCegarLoop]: === Iteration 99 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:28,758 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:28,758 INFO L82 PathProgramCache]: Analyzing trace with hash 1702411067, now seen corresponding path program 73 times [2020-10-09 10:36:28,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:28,759 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1032239119] [2020-10-09 10:36:28,759 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:28,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:28,833 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:28,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1032239119] [2020-10-09 10:36:28,833 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1176137568] [2020-10-09 10:36:28,833 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 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 92 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:28,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:28,874 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:28,875 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:28,998 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:29,037 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:29,038 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:29,038 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:29,038 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255331532] [2020-10-09 10:36:29,038 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:29,038 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:29,038 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:29,039 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:29,039 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:29,486 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:29,487 INFO L93 Difference]: Finished difference Result 212 states and 503 transitions. [2020-10-09 10:36:29,487 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:36:29,487 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:29,488 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:29,489 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:36:29,489 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:36:29,490 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=250, Invalid=506, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:36:29,490 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:36:29,493 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-09 10:36:29,493 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:29,493 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:29,494 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:29,494 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:29,494 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:29,494 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:29,494 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:29,494 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:29,494 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:29,494 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:29,695 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 92 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable98 [2020-10-09 10:36:29,695 INFO L429 AbstractCegarLoop]: === Iteration 100 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:29,696 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:29,696 INFO L82 PathProgramCache]: Analyzing trace with hash 1702412028, now seen corresponding path program 74 times [2020-10-09 10:36:29,696 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:29,696 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [973229719] [2020-10-09 10:36:29,697 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:29,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:29,763 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:29,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [973229719] [2020-10-09 10:36:29,764 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1439415000] [2020-10-09 10:36:29,764 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 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 93 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:29,804 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:36:29,804 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:29,804 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:29,805 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:29,904 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:29,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:29,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:29,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:29,932 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [305965955] [2020-10-09 10:36:29,933 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:29,933 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:29,933 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:29,933 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:29,933 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:30,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:30,261 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-09 10:36:30,262 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:30,262 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:30,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:30,264 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:36:30,264 INFO L226 Difference]: Without dead ends: 197 [2020-10-09 10:36:30,265 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 95 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=199, Invalid=401, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:36:30,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-09 10:36:30,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 141. [2020-10-09 10:36:30,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:30,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 343 transitions. [2020-10-09 10:36:30,268 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 343 transitions. Word has length 13 [2020-10-09 10:36:30,268 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:30,268 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 343 transitions. [2020-10-09 10:36:30,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:30,268 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 343 transitions. [2020-10-09 10:36:30,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:30,268 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:30,268 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:30,469 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99,93 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:30,469 INFO L429 AbstractCegarLoop]: === Iteration 101 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:30,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:30,470 INFO L82 PathProgramCache]: Analyzing trace with hash 1702620348, now seen corresponding path program 75 times [2020-10-09 10:36:30,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:30,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728298857] [2020-10-09 10:36:30,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:30,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:30,537 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728298857] [2020-10-09 10:36:30,537 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1593845254] [2020-10-09 10:36:30,537 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 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 94 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:30,577 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:36:30,577 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:30,577 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:30,578 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:31,273 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:31,273 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:31,273 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:31,273 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1365878654] [2020-10-09 10:36:31,273 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:31,274 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:31,274 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:31,274 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:31,274 INFO L87 Difference]: Start difference. First operand 141 states and 343 transitions. Second operand 15 states. [2020-10-09 10:36:31,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:31,566 INFO L93 Difference]: Finished difference Result 198 states and 460 transitions. [2020-10-09 10:36:31,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:36:31,567 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:31,567 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:31,568 INFO L225 Difference]: With dead ends: 198 [2020-10-09 10:36:31,568 INFO L226 Difference]: Without dead ends: 196 [2020-10-09 10:36:31,568 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=148, Invalid=358, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:36:31,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-09 10:36:31,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 143. [2020-10-09 10:36:31,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:36:31,572 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 350 transitions. [2020-10-09 10:36:31,572 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 350 transitions. Word has length 13 [2020-10-09 10:36:31,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:31,572 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 350 transitions. [2020-10-09 10:36:31,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:31,572 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 350 transitions. [2020-10-09 10:36:31,573 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:31,573 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:31,573 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:31,781 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 94 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable100 [2020-10-09 10:36:31,782 INFO L429 AbstractCegarLoop]: === Iteration 102 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:31,782 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:31,782 INFO L82 PathProgramCache]: Analyzing trace with hash 1703283438, now seen corresponding path program 76 times [2020-10-09 10:36:31,783 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:31,783 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [635487902] [2020-10-09 10:36:31,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:31,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:31,852 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:31,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [635487902] [2020-10-09 10:36:31,853 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1177518535] [2020-10-09 10:36:31,853 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 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 95 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:31,893 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:36:31,893 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:31,894 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:31,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:32,064 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:32,064 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:32,065 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:32,065 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130148961] [2020-10-09 10:36:32,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:32,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:32,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:32,065 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:32,065 INFO L87 Difference]: Start difference. First operand 143 states and 350 transitions. Second operand 15 states. [2020-10-09 10:36:32,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:32,480 INFO L93 Difference]: Finished difference Result 209 states and 491 transitions. [2020-10-09 10:36:32,480 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:36:32,481 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:32,481 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:32,482 INFO L225 Difference]: With dead ends: 209 [2020-10-09 10:36:32,482 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:36:32,483 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=206, Invalid=444, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:36:32,483 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:36:32,485 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 145. [2020-10-09 10:36:32,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:36:32,486 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 357 transitions. [2020-10-09 10:36:32,486 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 357 transitions. Word has length 13 [2020-10-09 10:36:32,486 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:32,486 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 357 transitions. [2020-10-09 10:36:32,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:32,487 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 357 transitions. [2020-10-09 10:36:32,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:32,487 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:32,487 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:32,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 95 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable101 [2020-10-09 10:36:32,689 INFO L429 AbstractCegarLoop]: === Iteration 103 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:32,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:32,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1703304797, now seen corresponding path program 77 times [2020-10-09 10:36:32,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:32,690 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [943768822] [2020-10-09 10:36:32,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:32,694 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:32,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:32,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [943768822] [2020-10-09 10:36:32,758 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [211751758] [2020-10-09 10:36:32,758 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 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 96 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:32,797 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:36:32,797 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:32,798 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:32,799 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:32,917 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:32,954 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:32,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:32,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:32,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109688245] [2020-10-09 10:36:32,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:32,955 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:32,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:32,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=140, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:36:32,956 INFO L87 Difference]: Start difference. First operand 145 states and 357 transitions. Second operand 15 states. [2020-10-09 10:36:33,503 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:33,503 INFO L93 Difference]: Finished difference Result 217 states and 518 transitions. [2020-10-09 10:36:33,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:36:33,504 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:33,504 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:33,505 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:36:33,505 INFO L226 Difference]: Without dead ends: 212 [2020-10-09 10:36:33,506 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 181 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=289, Invalid=581, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:36:33,507 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-09 10:36:33,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 146. [2020-10-09 10:36:33,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-09 10:36:33,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 362 transitions. [2020-10-09 10:36:33,510 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 362 transitions. Word has length 13 [2020-10-09 10:36:33,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:33,510 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 362 transitions. [2020-10-09 10:36:33,510 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:33,511 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 362 transitions. [2020-10-09 10:36:33,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:33,511 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:33,511 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:33,717 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 96 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable102 [2020-10-09 10:36:33,718 INFO L429 AbstractCegarLoop]: === Iteration 104 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:33,718 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:33,718 INFO L82 PathProgramCache]: Analyzing trace with hash 1703305758, now seen corresponding path program 78 times [2020-10-09 10:36:33,718 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:33,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1242112428] [2020-10-09 10:36:33,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:33,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:33,792 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1242112428] [2020-10-09 10:36:33,793 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [849408159] [2020-10-09 10:36:33,793 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 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 97 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:33,833 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:36:33,833 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:36:33,834 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:33,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:36,005 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:36,048 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:36,048 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:36,049 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:36:36,049 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1011470852] [2020-10-09 10:36:36,049 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:36:36,049 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:36,049 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:36:36,049 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=142, Unknown=1, NotChecked=0, Total=210 [2020-10-09 10:36:36,049 INFO L87 Difference]: Start difference. First operand 146 states and 362 transitions. Second operand 15 states. [2020-10-09 10:36:40,329 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:36:44,548 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-09 10:36:44,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:36:44,988 INFO L93 Difference]: Finished difference Result 236 states and 562 transitions. [2020-10-09 10:36:44,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:36:44,989 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:36:44,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:36:44,990 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:36:44,990 INFO L226 Difference]: Without dead ends: 228 [2020-10-09 10:36:44,991 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 10.9s TimeCoverageRelationStatistics Valid=293, Invalid=636, Unknown=1, NotChecked=0, Total=930 [2020-10-09 10:36:44,992 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-09 10:36:44,994 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 141. [2020-10-09 10:36:44,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:36:44,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 346 transitions. [2020-10-09 10:36:44,994 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 346 transitions. Word has length 13 [2020-10-09 10:36:44,995 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:36:44,995 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 346 transitions. [2020-10-09 10:36:44,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:36:44,995 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 346 transitions. [2020-10-09 10:36:44,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:36:44,995 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:36:44,995 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:36:45,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 97 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable103 [2020-10-09 10:36:45,206 INFO L429 AbstractCegarLoop]: === Iteration 105 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:36:45,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:36:45,206 INFO L82 PathProgramCache]: Analyzing trace with hash 1703334588, now seen corresponding path program 79 times [2020-10-09 10:36:45,207 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:36:45,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1067933370] [2020-10-09 10:36:45,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:36:45,211 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:45,276 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:45,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1067933370] [2020-10-09 10:36:45,276 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830625433] [2020-10-09 10:36:45,276 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 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 98 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:36:45,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:36:45,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:36:45,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:36:45,440 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:36:45,441 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:36:50,668 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 61 DAG size of output: 34 [2020-10-09 10:36:50,670 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:36:50,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:36:50,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-09 10:36:50,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1165487615] [2020-10-09 10:36:50,670 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 10:36:50,670 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:36:50,671 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 10:36:50,671 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=169, Unknown=1, NotChecked=0, Total=240 [2020-10-09 10:36:50,671 INFO L87 Difference]: Start difference. First operand 141 states and 346 transitions. Second operand 16 states. [2020-10-09 10:36:52,347 WARN L193 SmtUtils]: Spent 1.22 s on a formula simplification that was a NOOP. DAG size: 44 [2020-10-09 10:36:57,840 WARN L193 SmtUtils]: Spent 1.30 s on a formula simplification that was a NOOP. DAG size: 51 [2020-10-09 10:37:02,031 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 60 DAG size of output: 58 [2020-10-09 10:37:36,712 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:36,713 INFO L93 Difference]: Finished difference Result 236 states and 556 transitions. [2020-10-09 10:37:36,713 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:37:36,713 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-09 10:37:36,713 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:36,714 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:37:36,714 INFO L226 Difference]: Without dead ends: 231 [2020-10-09 10:37:36,715 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 26.2s TimeCoverageRelationStatistics Valid=311, Invalid=734, Unknown=11, NotChecked=0, Total=1056 [2020-10-09 10:37:36,715 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-09 10:37:36,717 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 140. [2020-10-09 10:37:36,718 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:37:36,718 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 341 transitions. [2020-10-09 10:37:36,718 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 341 transitions. Word has length 13 [2020-10-09 10:37:36,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:36,718 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 341 transitions. [2020-10-09 10:37:36,718 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 10:37:36,718 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 341 transitions. [2020-10-09 10:37:36,719 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:36,719 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:36,719 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:36,919 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104,98 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:36,920 INFO L429 AbstractCegarLoop]: === Iteration 106 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:36,920 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:36,920 INFO L82 PathProgramCache]: Analyzing trace with hash 1709770188, now seen corresponding path program 80 times [2020-10-09 10:37:36,920 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:36,921 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [52889717] [2020-10-09 10:37:36,921 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:36,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:36,997 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [52889717] [2020-10-09 10:37:37,000 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1181331475] [2020-10-09 10:37:37,001 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 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 99 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:37,039 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:37,039 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:37,040 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:37,040 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:37,177 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:37,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:37,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:37,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000858681] [2020-10-09 10:37:37,178 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:37,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:37,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:37,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:37,179 INFO L87 Difference]: Start difference. First operand 140 states and 341 transitions. Second operand 15 states. [2020-10-09 10:37:37,483 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:37,483 INFO L93 Difference]: Finished difference Result 197 states and 457 transitions. [2020-10-09 10:37:37,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:37,484 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:37,484 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:37,485 INFO L225 Difference]: With dead ends: 197 [2020-10-09 10:37:37,485 INFO L226 Difference]: Without dead ends: 195 [2020-10-09 10:37:37,485 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 97 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:37:37,486 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-09 10:37:37,488 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 143. [2020-10-09 10:37:37,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:37:37,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 352 transitions. [2020-10-09 10:37:37,489 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 352 transitions. Word has length 13 [2020-10-09 10:37:37,489 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:37,489 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 352 transitions. [2020-10-09 10:37:37,489 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:37,489 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 352 transitions. [2020-10-09 10:37:37,490 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:37,490 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:37,490 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:37,693 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105,99 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:37,694 INFO L429 AbstractCegarLoop]: === Iteration 107 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:37,694 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:37,694 INFO L82 PathProgramCache]: Analyzing trace with hash 1709771149, now seen corresponding path program 81 times [2020-10-09 10:37:37,694 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:37,695 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [871097149] [2020-10-09 10:37:37,695 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:37,701 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:37,771 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:37,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [871097149] [2020-10-09 10:37:37,772 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2030214504] [2020-10-09 10:37:37,772 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 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 100 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:37,811 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:37:37,811 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:37,812 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:37,812 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:37,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:37,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:37,942 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:37,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339214601] [2020-10-09 10:37:37,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:37,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:37,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:37,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:37,943 INFO L87 Difference]: Start difference. First operand 143 states and 352 transitions. Second operand 15 states. [2020-10-09 10:37:38,232 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:38,232 INFO L93 Difference]: Finished difference Result 202 states and 467 transitions. [2020-10-09 10:37:38,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:38,232 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:38,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:38,233 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:37:38,233 INFO L226 Difference]: Without dead ends: 200 [2020-10-09 10:37:38,234 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 93 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=147, Invalid=359, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:37:38,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-09 10:37:38,238 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 143. [2020-10-09 10:37:38,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:37:38,238 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 351 transitions. [2020-10-09 10:37:38,239 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 351 transitions. Word has length 13 [2020-10-09 10:37:38,239 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:38,239 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 351 transitions. [2020-10-09 10:37:38,239 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:38,239 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 351 transitions. [2020-10-09 10:37:38,239 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:38,240 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:38,240 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:38,442 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 100 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable106 [2020-10-09 10:37:38,443 INFO L429 AbstractCegarLoop]: === Iteration 108 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:38,443 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:38,443 INFO L82 PathProgramCache]: Analyzing trace with hash 1709799979, now seen corresponding path program 82 times [2020-10-09 10:37:38,443 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:38,444 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [241515340] [2020-10-09 10:37:38,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:38,448 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:38,522 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [241515340] [2020-10-09 10:37:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [753947793] [2020-10-09 10:37:38,523 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 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 101 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:38,560 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:38,561 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:38,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:38,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:38,707 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:38,708 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:38,708 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:38,708 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737479228] [2020-10-09 10:37:38,708 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:38,709 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:38,709 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:38,709 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:38,709 INFO L87 Difference]: Start difference. First operand 143 states and 351 transitions. Second operand 15 states. [2020-10-09 10:37:39,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:39,018 INFO L93 Difference]: Finished difference Result 197 states and 458 transitions. [2020-10-09 10:37:39,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:37:39,019 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:39,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:39,019 INFO L225 Difference]: With dead ends: 197 [2020-10-09 10:37:39,020 INFO L226 Difference]: Without dead ends: 195 [2020-10-09 10:37:39,020 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 102 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=144, Invalid=362, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:37:39,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 195 states. [2020-10-09 10:37:39,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 195 to 142. [2020-10-09 10:37:39,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:37:39,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 348 transitions. [2020-10-09 10:37:39,023 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 348 transitions. Word has length 13 [2020-10-09 10:37:39,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:39,023 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 348 transitions. [2020-10-09 10:37:39,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:39,023 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 348 transitions. [2020-10-09 10:37:39,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:39,023 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:39,023 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:39,224 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 101 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable107 [2020-10-09 10:37:39,224 INFO L429 AbstractCegarLoop]: === Iteration 109 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:39,224 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:39,225 INFO L82 PathProgramCache]: Analyzing trace with hash 1730325978, now seen corresponding path program 83 times [2020-10-09 10:37:39,225 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:39,225 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047254632] [2020-10-09 10:37:39,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:39,229 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:39,300 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:39,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047254632] [2020-10-09 10:37:39,300 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1667146856] [2020-10-09 10:37:39,300 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 102 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:39,339 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:39,340 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:39,341 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:39,342 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:39,547 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:39,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:39,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:39,548 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1932205455] [2020-10-09 10:37:39,548 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:39,548 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:39,549 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:39,549 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:39,549 INFO L87 Difference]: Start difference. First operand 142 states and 348 transitions. Second operand 15 states. [2020-10-09 10:37:40,188 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:40,189 INFO L93 Difference]: Finished difference Result 214 states and 496 transitions. [2020-10-09 10:37:40,190 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:37:40,190 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:40,190 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:40,191 INFO L225 Difference]: With dead ends: 214 [2020-10-09 10:37:40,191 INFO L226 Difference]: Without dead ends: 212 [2020-10-09 10:37:40,192 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=227, Invalid=529, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:37:40,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-09 10:37:40,196 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 144. [2020-10-09 10:37:40,196 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:37:40,197 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 356 transitions. [2020-10-09 10:37:40,197 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 356 transitions. Word has length 13 [2020-10-09 10:37:40,198 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:40,198 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 356 transitions. [2020-10-09 10:37:40,198 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:40,198 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 356 transitions. [2020-10-09 10:37:40,199 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:40,199 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:40,199 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:40,412 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 102 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable108 [2020-10-09 10:37:40,412 INFO L429 AbstractCegarLoop]: === Iteration 110 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:40,413 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:40,413 INFO L82 PathProgramCache]: Analyzing trace with hash 1730326939, now seen corresponding path program 84 times [2020-10-09 10:37:40,413 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:40,413 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [182401009] [2020-10-09 10:37:40,413 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:40,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:40,488 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:40,488 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [182401009] [2020-10-09 10:37:40,489 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [505997138] [2020-10-09 10:37:40,489 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 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 103 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:40,531 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:37:40,531 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:40,532 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:40,533 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:40,647 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:40,648 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:40,648 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:40,648 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [476524942] [2020-10-09 10:37:40,648 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:40,648 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:40,649 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:40,649 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:40,649 INFO L87 Difference]: Start difference. First operand 144 states and 356 transitions. Second operand 15 states. [2020-10-09 10:37:41,084 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:41,084 INFO L93 Difference]: Finished difference Result 217 states and 502 transitions. [2020-10-09 10:37:41,085 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:37:41,085 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:41,085 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:41,086 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:37:41,086 INFO L226 Difference]: Without dead ends: 215 [2020-10-09 10:37:41,086 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=207, Invalid=495, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:37:41,086 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-09 10:37:41,088 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 145. [2020-10-09 10:37:41,088 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:37:41,088 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-09 10:37:41,088 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-09 10:37:41,089 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:41,089 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-09 10:37:41,089 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:41,089 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-09 10:37:41,089 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:41,089 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:41,089 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:41,290 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109,103 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:41,290 INFO L429 AbstractCegarLoop]: === Iteration 111 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:41,290 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:41,290 INFO L82 PathProgramCache]: Analyzing trace with hash 1730989068, now seen corresponding path program 85 times [2020-10-09 10:37:41,291 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:41,291 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870995302] [2020-10-09 10:37:41,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:41,295 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:41,369 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:41,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870995302] [2020-10-09 10:37:41,369 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2000875250] [2020-10-09 10:37:41,369 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 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 104 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:41,422 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:41,423 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:41,424 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:41,569 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:41,569 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:41,569 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:41,570 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521476709] [2020-10-09 10:37:41,570 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:41,570 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:41,570 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:41,571 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:41,571 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-09 10:37:42,010 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:42,010 INFO L93 Difference]: Finished difference Result 211 states and 500 transitions. [2020-10-09 10:37:42,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:37:42,011 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:42,011 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:42,012 INFO L225 Difference]: With dead ends: 211 [2020-10-09 10:37:42,012 INFO L226 Difference]: Without dead ends: 209 [2020-10-09 10:37:42,013 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=238, Invalid=518, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:37:42,013 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 209 states. [2020-10-09 10:37:42,015 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 209 to 147. [2020-10-09 10:37:42,016 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:37:42,016 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:37:42,016 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:37:42,016 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:42,017 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:37:42,017 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:42,017 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:37:42,017 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:42,017 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:42,017 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:42,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110,104 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:42,227 INFO L429 AbstractCegarLoop]: === Iteration 112 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:42,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:42,227 INFO L82 PathProgramCache]: Analyzing trace with hash 1731010427, now seen corresponding path program 86 times [2020-10-09 10:37:42,227 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:42,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1447838010] [2020-10-09 10:37:42,228 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:42,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:42,303 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:42,303 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1447838010] [2020-10-09 10:37:42,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1879561909] [2020-10-09 10:37:42,304 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 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 105 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:42,344 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:42,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:42,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:42,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:42,456 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:37:42,467 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:42,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:42,468 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:42,468 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [302502743] [2020-10-09 10:37:42,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:42,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:42,469 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:42,469 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:42,469 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:37:42,980 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:42,981 INFO L93 Difference]: Finished difference Result 211 states and 507 transitions. [2020-10-09 10:37:42,981 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:37:42,981 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:42,981 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:42,982 INFO L225 Difference]: With dead ends: 211 [2020-10-09 10:37:42,982 INFO L226 Difference]: Without dead ends: 206 [2020-10-09 10:37:42,982 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 223 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:37:42,983 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-09 10:37:42,984 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 147. [2020-10-09 10:37:42,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:37:42,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:37:42,985 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:37:42,985 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:42,985 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:37:42,985 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:42,985 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:37:42,985 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:42,985 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:42,986 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:43,186 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 105 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable111 [2020-10-09 10:37:43,186 INFO L429 AbstractCegarLoop]: === Iteration 113 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:43,187 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:43,187 INFO L82 PathProgramCache]: Analyzing trace with hash 1731011388, now seen corresponding path program 87 times [2020-10-09 10:37:43,187 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:43,187 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509204] [2020-10-09 10:37:43,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:43,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:43,268 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:43,268 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509204] [2020-10-09 10:37:43,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2100509768] [2020-10-09 10:37:43,269 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 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 106 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:43,308 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:37:43,309 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:43,309 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:43,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:43,430 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:37:43,468 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:43,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:43,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:43,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [394336594] [2020-10-09 10:37:43,470 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:43,470 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:43,470 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:43,470 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:43,470 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:37:44,113 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:44,113 INFO L93 Difference]: Finished difference Result 227 states and 546 transitions. [2020-10-09 10:37:44,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:37:44,113 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:44,113 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:44,114 INFO L225 Difference]: With dead ends: 227 [2020-10-09 10:37:44,114 INFO L226 Difference]: Without dead ends: 222 [2020-10-09 10:37:44,114 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:37:44,115 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-09 10:37:44,116 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 145. [2020-10-09 10:37:44,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 145 states. [2020-10-09 10:37:44,117 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 145 states to 145 states and 360 transitions. [2020-10-09 10:37:44,117 INFO L78 Accepts]: Start accepts. Automaton has 145 states and 360 transitions. Word has length 13 [2020-10-09 10:37:44,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:44,117 INFO L481 AbstractCegarLoop]: Abstraction has 145 states and 360 transitions. [2020-10-09 10:37:44,117 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:44,117 INFO L276 IsEmpty]: Start isEmpty. Operand 145 states and 360 transitions. [2020-10-09 10:37:44,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:44,118 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:44,118 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:44,318 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 106 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable112 [2020-10-09 10:37:44,318 INFO L429 AbstractCegarLoop]: === Iteration 114 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:44,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:44,319 INFO L82 PathProgramCache]: Analyzing trace with hash 1731018859, now seen corresponding path program 88 times [2020-10-09 10:37:44,319 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:44,319 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1711949033] [2020-10-09 10:37:44,320 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:44,324 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:44,405 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:44,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1711949033] [2020-10-09 10:37:44,405 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1789377353] [2020-10-09 10:37:44,405 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 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 107 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:44,445 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:37:44,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:44,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:44,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:44,588 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:44,589 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:44,589 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:44,589 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [724269902] [2020-10-09 10:37:44,589 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:44,589 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:44,589 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:44,589 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:44,589 INFO L87 Difference]: Start difference. First operand 145 states and 360 transitions. Second operand 15 states. [2020-10-09 10:37:45,105 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:45,106 INFO L93 Difference]: Finished difference Result 221 states and 523 transitions. [2020-10-09 10:37:45,106 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:37:45,106 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:45,106 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:45,107 INFO L225 Difference]: With dead ends: 221 [2020-10-09 10:37:45,107 INFO L226 Difference]: Without dead ends: 219 [2020-10-09 10:37:45,107 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 225 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=278, Invalid=652, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:37:45,108 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-09 10:37:45,110 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 147. [2020-10-09 10:37:45,110 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 147 states. [2020-10-09 10:37:45,111 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 147 states to 147 states and 367 transitions. [2020-10-09 10:37:45,111 INFO L78 Accepts]: Start accepts. Automaton has 147 states and 367 transitions. Word has length 13 [2020-10-09 10:37:45,111 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:45,111 INFO L481 AbstractCegarLoop]: Abstraction has 147 states and 367 transitions. [2020-10-09 10:37:45,111 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:45,111 INFO L276 IsEmpty]: Start isEmpty. Operand 147 states and 367 transitions. [2020-10-09 10:37:45,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:45,112 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:45,112 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:45,312 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113,107 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:45,312 INFO L429 AbstractCegarLoop]: === Iteration 115 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:45,313 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:45,313 INFO L82 PathProgramCache]: Analyzing trace with hash 1731040218, now seen corresponding path program 89 times [2020-10-09 10:37:45,313 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:45,314 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1421007360] [2020-10-09 10:37:45,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:45,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:45,399 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:45,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1421007360] [2020-10-09 10:37:45,399 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1420583431] [2020-10-09 10:37:45,400 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 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 108 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:45,445 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:37:45,445 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:45,446 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:45,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:45,553 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:37:45,563 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:45,563 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:45,564 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:45,564 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1807430761] [2020-10-09 10:37:45,564 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:45,564 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:45,565 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:45,565 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:45,565 INFO L87 Difference]: Start difference. First operand 147 states and 367 transitions. Second operand 15 states. [2020-10-09 10:37:46,211 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:46,211 INFO L93 Difference]: Finished difference Result 240 states and 577 transitions. [2020-10-09 10:37:46,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:37:46,212 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:46,212 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:46,212 INFO L225 Difference]: With dead ends: 240 [2020-10-09 10:37:46,212 INFO L226 Difference]: Without dead ends: 232 [2020-10-09 10:37:46,213 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 271 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:37:46,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-09 10:37:46,215 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 148. [2020-10-09 10:37:46,215 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-09 10:37:46,215 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 372 transitions. [2020-10-09 10:37:46,216 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 372 transitions. Word has length 13 [2020-10-09 10:37:46,216 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:46,216 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 372 transitions. [2020-10-09 10:37:46,216 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:46,216 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 372 transitions. [2020-10-09 10:37:46,216 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:46,217 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:46,217 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:46,425 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 108 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable114 [2020-10-09 10:37:46,426 INFO L429 AbstractCegarLoop]: === Iteration 116 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:46,426 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:46,426 INFO L82 PathProgramCache]: Analyzing trace with hash 1731041179, now seen corresponding path program 90 times [2020-10-09 10:37:46,427 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:46,427 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [560243763] [2020-10-09 10:37:46,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:46,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:46,505 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:46,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [560243763] [2020-10-09 10:37:46,506 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475376870] [2020-10-09 10:37:46,506 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 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 109 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:46,548 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:37:46,548 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:46,549 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:46,550 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:46,655 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:37:46,667 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:46,667 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:46,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:46,668 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1400218071] [2020-10-09 10:37:46,668 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:46,668 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:46,668 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:46,668 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:46,668 INFO L87 Difference]: Start difference. First operand 148 states and 372 transitions. Second operand 15 states. [2020-10-09 10:37:47,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:47,299 INFO L93 Difference]: Finished difference Result 238 states and 576 transitions. [2020-10-09 10:37:47,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:37:47,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:47,300 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:47,301 INFO L225 Difference]: With dead ends: 238 [2020-10-09 10:37:47,301 INFO L226 Difference]: Without dead ends: 230 [2020-10-09 10:37:47,301 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 279 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:37:47,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 230 states. [2020-10-09 10:37:47,304 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 230 to 142. [2020-10-09 10:37:47,304 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:37:47,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-09 10:37:47,305 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-09 10:37:47,305 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:47,305 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-09 10:37:47,305 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:47,305 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-09 10:37:47,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:47,306 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:47,306 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:47,506 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115,109 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:47,507 INFO L429 AbstractCegarLoop]: === Iteration 117 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:47,507 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:47,507 INFO L82 PathProgramCache]: Analyzing trace with hash 1731249499, now seen corresponding path program 91 times [2020-10-09 10:37:47,507 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:47,508 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111474692] [2020-10-09 10:37:47,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:47,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:47,585 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:47,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111474692] [2020-10-09 10:37:47,585 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1779749387] [2020-10-09 10:37:47,585 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 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 110 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:47,622 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:47,622 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:47,623 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:47,758 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:47,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:47,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:47,759 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2054098960] [2020-10-09 10:37:47,759 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:47,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:47,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:47,760 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:47,760 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-09 10:37:48,034 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:48,035 INFO L93 Difference]: Finished difference Result 195 states and 459 transitions. [2020-10-09 10:37:48,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:37:48,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:48,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:48,036 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:37:48,036 INFO L226 Difference]: Without dead ends: 193 [2020-10-09 10:37:48,036 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=149, Invalid=357, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:37:48,036 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-09 10:37:48,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 142. [2020-10-09 10:37:48,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:37:48,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 354 transitions. [2020-10-09 10:37:48,040 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 354 transitions. Word has length 13 [2020-10-09 10:37:48,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:48,040 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 354 transitions. [2020-10-09 10:37:48,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:48,040 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 354 transitions. [2020-10-09 10:37:48,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:48,041 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:48,041 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:48,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 110 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable116 [2020-10-09 10:37:48,244 INFO L429 AbstractCegarLoop]: === Iteration 118 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:48,244 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:48,244 INFO L82 PathProgramCache]: Analyzing trace with hash 1731912589, now seen corresponding path program 92 times [2020-10-09 10:37:48,244 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:48,245 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1825402638] [2020-10-09 10:37:48,245 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:48,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:48,329 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:48,329 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1825402638] [2020-10-09 10:37:48,330 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1883855328] [2020-10-09 10:37:48,330 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 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 111 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:48,369 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:37:48,369 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:48,369 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:48,370 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:48,529 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:48,530 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:48,530 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:37:48,530 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2006467787] [2020-10-09 10:37:48,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:37:48,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:48,531 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:37:48,531 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:37:48,531 INFO L87 Difference]: Start difference. First operand 142 states and 354 transitions. Second operand 15 states. [2020-10-09 10:37:49,035 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:37:49,035 INFO L93 Difference]: Finished difference Result 206 states and 489 transitions. [2020-10-09 10:37:49,035 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:37:49,035 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:37:49,035 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:37:49,036 INFO L225 Difference]: With dead ends: 206 [2020-10-09 10:37:49,036 INFO L226 Difference]: Without dead ends: 204 [2020-10-09 10:37:49,036 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 167 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=230, Invalid=526, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:37:49,037 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-09 10:37:49,039 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 143. [2020-10-09 10:37:49,039 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 143 states. [2020-10-09 10:37:49,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 143 states to 143 states and 356 transitions. [2020-10-09 10:37:49,040 INFO L78 Accepts]: Start accepts. Automaton has 143 states and 356 transitions. Word has length 13 [2020-10-09 10:37:49,040 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:37:49,040 INFO L481 AbstractCegarLoop]: Abstraction has 143 states and 356 transitions. [2020-10-09 10:37:49,040 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:37:49,040 INFO L276 IsEmpty]: Start isEmpty. Operand 143 states and 356 transitions. [2020-10-09 10:37:49,040 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:37:49,040 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:37:49,041 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:37:49,241 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117,111 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:49,241 INFO L429 AbstractCegarLoop]: === Iteration 119 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:37:49,242 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:37:49,242 INFO L82 PathProgramCache]: Analyzing trace with hash 1731934909, now seen corresponding path program 93 times [2020-10-09 10:37:49,242 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:37:49,242 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1778314654] [2020-10-09 10:37:49,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:37:49,246 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:37:49,325 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:49,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1778314654] [2020-10-09 10:37:49,325 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1778712038] [2020-10-09 10:37:49,326 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 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 112 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:37:49,371 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:37:49,372 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:37:49,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:37:49,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:37:49,491 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:37:53,633 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 19 [2020-10-09 10:37:53,634 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:37:53,634 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:37:53,634 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-09 10:37:53,634 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [787320493] [2020-10-09 10:37:53,635 INFO L461 AbstractCegarLoop]: Interpolant automaton has 16 states [2020-10-09 10:37:53,635 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:37:53,635 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2020-10-09 10:37:53,635 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=171, Unknown=1, NotChecked=0, Total=240 [2020-10-09 10:37:53,635 INFO L87 Difference]: Start difference. First operand 143 states and 356 transitions. Second operand 16 states. [2020-10-09 10:37:56,152 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 25 [2020-10-09 10:38:16,351 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 29 [2020-10-09 10:38:54,002 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 26 DAG size of output: 25 [2020-10-09 10:39:12,279 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:12,279 INFO L93 Difference]: Finished difference Result 260 states and 609 transitions. [2020-10-09 10:39:12,280 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:39:12,280 INFO L78 Accepts]: Start accepts. Automaton has 16 states. Word has length 13 [2020-10-09 10:39:12,280 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:12,281 INFO L225 Difference]: With dead ends: 260 [2020-10-09 10:39:12,281 INFO L226 Difference]: Without dead ends: 255 [2020-10-09 10:39:12,281 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 31.2s TimeCoverageRelationStatistics Valid=389, Invalid=934, Unknown=9, NotChecked=0, Total=1332 [2020-10-09 10:39:12,281 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 255 states. [2020-10-09 10:39:12,283 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 255 to 139. [2020-10-09 10:39:12,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:39:12,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 339 transitions. [2020-10-09 10:39:12,283 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 339 transitions. Word has length 13 [2020-10-09 10:39:12,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:12,284 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 339 transitions. [2020-10-09 10:39:12,284 INFO L482 AbstractCegarLoop]: Interpolant automaton has 16 states. [2020-10-09 10:39:12,284 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 339 transitions. [2020-10-09 10:39:12,284 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:12,284 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:12,284 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:12,484 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 112 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable118 [2020-10-09 10:39:12,485 INFO L429 AbstractCegarLoop]: === Iteration 120 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:12,485 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:12,485 INFO L82 PathProgramCache]: Analyzing trace with hash 1931415228, now seen corresponding path program 94 times [2020-10-09 10:39:12,486 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:12,486 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614945394] [2020-10-09 10:39:12,486 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:12,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:12,578 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:12,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614945394] [2020-10-09 10:39:12,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [317526436] [2020-10-09 10:39:12,579 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 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 113 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:12,617 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:12,617 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:12,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:12,618 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:12,753 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:12,754 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:12,754 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:12,754 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [33786912] [2020-10-09 10:39:12,755 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:12,755 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:12,755 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:12,755 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=158, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:12,755 INFO L87 Difference]: Start difference. First operand 139 states and 339 transitions. Second operand 15 states. [2020-10-09 10:39:12,987 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:12,987 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-09 10:39:12,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:39:12,988 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:12,988 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:12,989 INFO L225 Difference]: With dead ends: 194 [2020-10-09 10:39:12,989 INFO L226 Difference]: Without dead ends: 192 [2020-10-09 10:39:12,989 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:39:12,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-09 10:39:12,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 141. [2020-10-09 10:39:12,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:39:12,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 345 transitions. [2020-10-09 10:39:12,992 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 345 transitions. Word has length 13 [2020-10-09 10:39:12,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:12,992 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 345 transitions. [2020-10-09 10:39:12,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:12,992 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 345 transitions. [2020-10-09 10:39:12,992 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:12,992 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:12,993 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:13,193 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119,113 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:13,193 INFO L429 AbstractCegarLoop]: === Iteration 121 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:13,194 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:13,194 INFO L82 PathProgramCache]: Analyzing trace with hash 1931416189, now seen corresponding path program 95 times [2020-10-09 10:39:13,194 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:13,194 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982699209] [2020-10-09 10:39:13,195 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:13,198 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:13,285 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:13,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982699209] [2020-10-09 10:39:13,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1898118569] [2020-10-09 10:39:13,286 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 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 114 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:13,324 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:13,324 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:13,325 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:13,325 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:13,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:13,467 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:13,467 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:13,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143136570] [2020-10-09 10:39:13,468 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:13,468 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:13,468 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:13,468 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=156, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:13,468 INFO L87 Difference]: Start difference. First operand 141 states and 345 transitions. Second operand 15 states. [2020-10-09 10:39:13,792 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:13,792 INFO L93 Difference]: Finished difference Result 205 states and 471 transitions. [2020-10-09 10:39:13,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:39:13,793 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:13,793 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:13,794 INFO L225 Difference]: With dead ends: 205 [2020-10-09 10:39:13,794 INFO L226 Difference]: Without dead ends: 203 [2020-10-09 10:39:13,794 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=162, Invalid=344, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:39:13,795 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-09 10:39:13,798 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 142. [2020-10-09 10:39:13,798 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:39:13,798 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 347 transitions. [2020-10-09 10:39:13,798 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 347 transitions. Word has length 13 [2020-10-09 10:39:13,799 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:13,799 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 347 transitions. [2020-10-09 10:39:13,799 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:13,799 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 347 transitions. [2020-10-09 10:39:13,799 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:13,799 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:13,799 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:14,008 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120,114 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:14,009 INFO L429 AbstractCegarLoop]: === Iteration 122 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:14,009 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:14,009 INFO L82 PathProgramCache]: Analyzing trace with hash 1931445019, now seen corresponding path program 96 times [2020-10-09 10:39:14,009 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:14,010 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268996356] [2020-10-09 10:39:14,010 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:14,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:14,106 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268996356] [2020-10-09 10:39:14,106 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [911610832] [2020-10-09 10:39:14,106 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 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 115 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:14,154 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:14,154 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:14,155 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:14,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:14,278 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:14,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:14,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:14,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1417141276] [2020-10-09 10:39:14,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:14,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:14,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:14,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:14,280 INFO L87 Difference]: Start difference. First operand 142 states and 347 transitions. Second operand 15 states. [2020-10-09 10:39:14,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:14,569 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-09 10:39:14,570 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:39:14,570 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:14,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:14,571 INFO L225 Difference]: With dead ends: 201 [2020-10-09 10:39:14,571 INFO L226 Difference]: Without dead ends: 199 [2020-10-09 10:39:14,571 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=161, Invalid=345, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:39:14,572 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-09 10:39:14,573 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 137. [2020-10-09 10:39:14,573 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:39:14,574 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 334 transitions. [2020-10-09 10:39:14,574 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 334 transitions. Word has length 13 [2020-10-09 10:39:14,574 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:14,574 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 334 transitions. [2020-10-09 10:39:14,574 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:14,574 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 334 transitions. [2020-10-09 10:39:14,574 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:14,575 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:14,575 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:14,775 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121,115 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:14,775 INFO L429 AbstractCegarLoop]: === Iteration 123 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:14,776 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:14,776 INFO L82 PathProgramCache]: Analyzing trace with hash -1726322578, now seen corresponding path program 97 times [2020-10-09 10:39:14,776 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:14,776 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975393842] [2020-10-09 10:39:14,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:14,780 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:14,857 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:14,857 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975393842] [2020-10-09 10:39:14,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1664886535] [2020-10-09 10:39:14,858 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 116 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:14,896 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:14,897 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:14,898 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:15,104 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:15,105 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:15,105 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:15,105 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1390228335] [2020-10-09 10:39:15,105 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:15,106 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:15,106 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:15,106 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:15,106 INFO L87 Difference]: Start difference. First operand 137 states and 334 transitions. Second operand 15 states. [2020-10-09 10:39:15,422 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:15,423 INFO L93 Difference]: Finished difference Result 194 states and 449 transitions. [2020-10-09 10:39:15,423 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:39:15,424 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:15,424 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:15,424 INFO L225 Difference]: With dead ends: 194 [2020-10-09 10:39:15,425 INFO L226 Difference]: Without dead ends: 192 [2020-10-09 10:39:15,425 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 94 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=132, Invalid=330, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:39:15,425 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-09 10:39:15,428 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 140. [2020-10-09 10:39:15,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:39:15,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 345 transitions. [2020-10-09 10:39:15,428 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 345 transitions. Word has length 13 [2020-10-09 10:39:15,428 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:15,429 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 345 transitions. [2020-10-09 10:39:15,429 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:15,429 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 345 transitions. [2020-10-09 10:39:15,429 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:15,429 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:15,429 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:15,639 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 116 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable122 [2020-10-09 10:39:15,640 INFO L429 AbstractCegarLoop]: === Iteration 124 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:15,640 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:15,641 INFO L82 PathProgramCache]: Analyzing trace with hash -1726321617, now seen corresponding path program 98 times [2020-10-09 10:39:15,641 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:15,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [665036461] [2020-10-09 10:39:15,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:15,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:15,725 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:15,725 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [665036461] [2020-10-09 10:39:15,726 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [28783210] [2020-10-09 10:39:15,726 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 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 117 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:15,765 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:15,765 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:15,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:15,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:15,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:15,941 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:15,941 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:15,942 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [548105657] [2020-10-09 10:39:15,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:15,942 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:15,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:15,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=162, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:15,943 INFO L87 Difference]: Start difference. First operand 140 states and 345 transitions. Second operand 15 states. [2020-10-09 10:39:16,299 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:16,299 INFO L93 Difference]: Finished difference Result 209 states and 478 transitions. [2020-10-09 10:39:16,300 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:39:16,300 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:16,301 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:16,301 INFO L225 Difference]: With dead ends: 209 [2020-10-09 10:39:16,301 INFO L226 Difference]: Without dead ends: 207 [2020-10-09 10:39:16,302 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=156, Invalid=396, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:16,302 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 207 states. [2020-10-09 10:39:16,305 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 207 to 140. [2020-10-09 10:39:16,305 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 140 states. [2020-10-09 10:39:16,305 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 140 states to 140 states and 344 transitions. [2020-10-09 10:39:16,305 INFO L78 Accepts]: Start accepts. Automaton has 140 states and 344 transitions. Word has length 13 [2020-10-09 10:39:16,306 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:16,306 INFO L481 AbstractCegarLoop]: Abstraction has 140 states and 344 transitions. [2020-10-09 10:39:16,306 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:16,306 INFO L276 IsEmpty]: Start isEmpty. Operand 140 states and 344 transitions. [2020-10-09 10:39:16,306 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:16,306 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:16,306 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:16,511 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123,117 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:16,512 INFO L429 AbstractCegarLoop]: === Iteration 125 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:16,512 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:16,512 INFO L82 PathProgramCache]: Analyzing trace with hash -1726292787, now seen corresponding path program 99 times [2020-10-09 10:39:16,513 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:16,513 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792445305] [2020-10-09 10:39:16,513 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:16,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:16,593 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:16,593 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792445305] [2020-10-09 10:39:16,594 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1932025928] [2020-10-09 10:39:16,594 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 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 118 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:16,630 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:16,630 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:16,631 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:16,632 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:16,796 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:16,796 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:16,796 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:16,797 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1091100773] [2020-10-09 10:39:16,797 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:16,797 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:16,797 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:16,797 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=161, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:16,798 INFO L87 Difference]: Start difference. First operand 140 states and 344 transitions. Second operand 15 states. [2020-10-09 10:39:17,160 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:17,160 INFO L93 Difference]: Finished difference Result 202 states and 464 transitions. [2020-10-09 10:39:17,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:39:17,161 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:17,161 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:17,161 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:39:17,162 INFO L226 Difference]: Without dead ends: 200 [2020-10-09 10:39:17,162 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=169, Invalid=431, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:17,162 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 200 states. [2020-10-09 10:39:17,164 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 200 to 139. [2020-10-09 10:39:17,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:39:17,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-09 10:39:17,165 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-09 10:39:17,165 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:17,165 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-09 10:39:17,165 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:17,165 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-09 10:39:17,166 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:17,166 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:17,166 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:17,366 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 118 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable124 [2020-10-09 10:39:17,367 INFO L429 AbstractCegarLoop]: === Iteration 126 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:17,367 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:17,368 INFO L82 PathProgramCache]: Analyzing trace with hash -1705766788, now seen corresponding path program 100 times [2020-10-09 10:39:17,368 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:17,368 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1873119565] [2020-10-09 10:39:17,368 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:17,373 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:17,450 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:17,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1873119565] [2020-10-09 10:39:17,450 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1871775979] [2020-10-09 10:39:17,450 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 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 119 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:17,488 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:17,488 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:17,489 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:17,490 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:17,625 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:17,625 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:17,625 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:17,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1672819851] [2020-10-09 10:39:17,626 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:17,626 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:17,626 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:17,626 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:17,627 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 15 states. [2020-10-09 10:39:17,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:17,955 INFO L93 Difference]: Finished difference Result 201 states and 465 transitions. [2020-10-09 10:39:17,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:39:17,955 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:17,955 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:17,956 INFO L225 Difference]: With dead ends: 201 [2020-10-09 10:39:17,956 INFO L226 Difference]: Without dead ends: 199 [2020-10-09 10:39:17,956 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=423, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:17,957 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-09 10:39:17,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 141. [2020-10-09 10:39:17,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 141 states. [2020-10-09 10:39:17,959 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 141 states to 141 states and 349 transitions. [2020-10-09 10:39:17,959 INFO L78 Accepts]: Start accepts. Automaton has 141 states and 349 transitions. Word has length 13 [2020-10-09 10:39:17,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:17,959 INFO L481 AbstractCegarLoop]: Abstraction has 141 states and 349 transitions. [2020-10-09 10:39:17,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:17,959 INFO L276 IsEmpty]: Start isEmpty. Operand 141 states and 349 transitions. [2020-10-09 10:39:17,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:17,959 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:17,960 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:18,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 119 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable125 [2020-10-09 10:39:18,160 INFO L429 AbstractCegarLoop]: === Iteration 127 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:18,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:18,161 INFO L82 PathProgramCache]: Analyzing trace with hash -1705765827, now seen corresponding path program 101 times [2020-10-09 10:39:18,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:18,162 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [582848784] [2020-10-09 10:39:18,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:18,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:18,240 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:18,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [582848784] [2020-10-09 10:39:18,241 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [974364414] [2020-10-09 10:39:18,241 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 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 120 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:18,279 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:18,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:18,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:18,281 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:18,417 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:18,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:18,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:18,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [587256372] [2020-10-09 10:39:18,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:18,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:18,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:18,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=159, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:18,419 INFO L87 Difference]: Start difference. First operand 141 states and 349 transitions. Second operand 15 states. [2020-10-09 10:39:18,886 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:18,887 INFO L93 Difference]: Finished difference Result 215 states and 495 transitions. [2020-10-09 10:39:18,887 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:39:18,887 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:18,888 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:18,888 INFO L225 Difference]: With dead ends: 215 [2020-10-09 10:39:18,889 INFO L226 Difference]: Without dead ends: 213 [2020-10-09 10:39:18,889 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=218, Invalid=538, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:39:18,889 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-09 10:39:18,892 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 142. [2020-10-09 10:39:18,892 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:39:18,893 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-09 10:39:18,893 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-09 10:39:18,893 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:18,893 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-09 10:39:18,893 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:18,893 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-09 10:39:18,893 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:18,893 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:18,894 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:19,098 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126,120 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:19,099 INFO L429 AbstractCegarLoop]: === Iteration 128 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:19,099 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:19,099 INFO L82 PathProgramCache]: Analyzing trace with hash -1705103698, now seen corresponding path program 102 times [2020-10-09 10:39:19,100 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:19,100 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1006186747] [2020-10-09 10:39:19,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:19,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:19,182 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:19,182 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1006186747] [2020-10-09 10:39:19,183 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1592417486] [2020-10-09 10:39:19,183 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 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 121 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:19,220 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:19,220 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:19,221 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:19,221 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:19,356 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:19,357 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:19,357 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:19,357 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1747575857] [2020-10-09 10:39:19,358 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:19,358 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:19,358 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:19,358 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:19,358 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-09 10:39:19,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:19,764 INFO L93 Difference]: Finished difference Result 196 states and 461 transitions. [2020-10-09 10:39:19,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:39:19,765 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:19,765 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:19,766 INFO L225 Difference]: With dead ends: 196 [2020-10-09 10:39:19,766 INFO L226 Difference]: Without dead ends: 194 [2020-10-09 10:39:19,766 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=211, Invalid=491, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:19,767 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-09 10:39:19,769 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 144. [2020-10-09 10:39:19,769 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:39:19,770 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:39:19,770 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:39:19,770 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:19,770 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:39:19,771 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:19,771 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:39:19,771 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:19,771 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:19,771 INFO L421 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:19,975 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127,121 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:19,976 INFO L429 AbstractCegarLoop]: === Iteration 129 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:19,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:19,976 INFO L82 PathProgramCache]: Analyzing trace with hash -1705082339, now seen corresponding path program 103 times [2020-10-09 10:39:19,976 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:19,977 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400999587] [2020-10-09 10:39:19,977 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:19,981 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:20,073 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:20,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400999587] [2020-10-09 10:39:20,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1805967931] [2020-10-09 10:39:20,074 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 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 122 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:20,112 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:20,113 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:20,114 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:20,218 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:20,230 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:20,230 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:20,231 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:20,231 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2046182153] [2020-10-09 10:39:20,231 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:20,231 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:20,232 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:20,232 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:20,232 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:39:20,641 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:20,642 INFO L93 Difference]: Finished difference Result 191 states and 460 transitions. [2020-10-09 10:39:20,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:39:20,643 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:20,644 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:20,645 INFO L225 Difference]: With dead ends: 191 [2020-10-09 10:39:20,645 INFO L226 Difference]: Without dead ends: 186 [2020-10-09 10:39:20,645 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=196, Invalid=404, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:20,647 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-09 10:39:20,650 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 144. [2020-10-09 10:39:20,650 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:39:20,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:39:20,651 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:39:20,652 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:20,652 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:39:20,652 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:20,652 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:39:20,653 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:20,653 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:20,653 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:20,866 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 122 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable128 [2020-10-09 10:39:20,866 INFO L429 AbstractCegarLoop]: === Iteration 130 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:20,867 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:20,867 INFO L82 PathProgramCache]: Analyzing trace with hash -1705081378, now seen corresponding path program 104 times [2020-10-09 10:39:20,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:20,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1536440341] [2020-10-09 10:39:20,868 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:20,874 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:20,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1536440341] [2020-10-09 10:39:20,974 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1497640588] [2020-10-09 10:39:20,974 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 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 123 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:21,016 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:21,016 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:21,017 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:21,017 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:21,125 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:21,169 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:21,170 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:21,170 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:21,170 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1924581324] [2020-10-09 10:39:21,170 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:21,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:21,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:21,171 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:21,171 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:39:21,745 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:21,745 INFO L93 Difference]: Finished difference Result 232 states and 551 transitions. [2020-10-09 10:39:21,746 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:39:21,746 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:21,746 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:21,747 INFO L225 Difference]: With dead ends: 232 [2020-10-09 10:39:21,747 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:39:21,747 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=280, Invalid=650, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:39:21,748 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:39:21,750 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 142. [2020-10-09 10:39:21,750 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 142 states. [2020-10-09 10:39:21,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 142 states to 142 states and 353 transitions. [2020-10-09 10:39:21,751 INFO L78 Accepts]: Start accepts. Automaton has 142 states and 353 transitions. Word has length 13 [2020-10-09 10:39:21,751 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:21,751 INFO L481 AbstractCegarLoop]: Abstraction has 142 states and 353 transitions. [2020-10-09 10:39:21,751 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:21,752 INFO L276 IsEmpty]: Start isEmpty. Operand 142 states and 353 transitions. [2020-10-09 10:39:21,752 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:21,752 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:21,752 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:21,952 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129,123 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:21,953 INFO L429 AbstractCegarLoop]: === Iteration 131 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:21,953 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:21,953 INFO L82 PathProgramCache]: Analyzing trace with hash -1705073907, now seen corresponding path program 105 times [2020-10-09 10:39:21,954 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:21,954 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [724102741] [2020-10-09 10:39:21,954 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:21,959 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:22,029 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:22,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [724102741] [2020-10-09 10:39:22,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [213323353] [2020-10-09 10:39:22,030 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 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 124 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:22,066 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:22,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:22,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:22,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:22,214 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:22,214 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:22,214 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:22,215 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1599677734] [2020-10-09 10:39:22,215 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:22,215 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:22,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:22,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=152, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:22,216 INFO L87 Difference]: Start difference. First operand 142 states and 353 transitions. Second operand 15 states. [2020-10-09 10:39:22,768 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:22,768 INFO L93 Difference]: Finished difference Result 222 states and 521 transitions. [2020-10-09 10:39:22,769 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:39:22,769 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:22,769 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:22,770 INFO L225 Difference]: With dead ends: 222 [2020-10-09 10:39:22,770 INFO L226 Difference]: Without dead ends: 220 [2020-10-09 10:39:22,770 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=277, Invalid=653, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:39:22,771 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 220 states. [2020-10-09 10:39:22,772 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 220 to 144. [2020-10-09 10:39:22,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 144 states. [2020-10-09 10:39:22,773 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 144 states to 144 states and 360 transitions. [2020-10-09 10:39:22,773 INFO L78 Accepts]: Start accepts. Automaton has 144 states and 360 transitions. Word has length 13 [2020-10-09 10:39:22,773 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:22,773 INFO L481 AbstractCegarLoop]: Abstraction has 144 states and 360 transitions. [2020-10-09 10:39:22,773 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:22,773 INFO L276 IsEmpty]: Start isEmpty. Operand 144 states and 360 transitions. [2020-10-09 10:39:22,774 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:22,774 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:22,774 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:22,974 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130,124 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:22,975 INFO L429 AbstractCegarLoop]: === Iteration 132 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:22,975 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:22,975 INFO L82 PathProgramCache]: Analyzing trace with hash -1705052548, now seen corresponding path program 106 times [2020-10-09 10:39:22,975 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:22,976 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1982346985] [2020-10-09 10:39:22,976 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:22,980 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:23,060 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:23,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1982346985] [2020-10-09 10:39:23,060 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [569903797] [2020-10-09 10:39:23,061 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 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 125 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:23,100 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:23,100 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:23,101 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:23,102 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:23,224 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:23,263 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:23,264 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:23,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:23,265 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1440126210] [2020-10-09 10:39:23,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:23,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:23,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:23,265 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:23,265 INFO L87 Difference]: Start difference. First operand 144 states and 360 transitions. Second operand 15 states. [2020-10-09 10:39:24,068 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:24,068 INFO L93 Difference]: Finished difference Result 254 states and 608 transitions. [2020-10-09 10:39:24,072 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:39:24,072 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:24,072 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:24,073 INFO L225 Difference]: With dead ends: 254 [2020-10-09 10:39:24,073 INFO L226 Difference]: Without dead ends: 246 [2020-10-09 10:39:24,073 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 285 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=345, Invalid=777, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:39:24,074 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-09 10:39:24,076 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 146. [2020-10-09 10:39:24,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 146 states. [2020-10-09 10:39:24,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 146 states to 146 states and 370 transitions. [2020-10-09 10:39:24,077 INFO L78 Accepts]: Start accepts. Automaton has 146 states and 370 transitions. Word has length 13 [2020-10-09 10:39:24,077 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:24,077 INFO L481 AbstractCegarLoop]: Abstraction has 146 states and 370 transitions. [2020-10-09 10:39:24,077 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:24,077 INFO L276 IsEmpty]: Start isEmpty. Operand 146 states and 370 transitions. [2020-10-09 10:39:24,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:24,077 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:24,078 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:24,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131,125 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:24,285 INFO L429 AbstractCegarLoop]: === Iteration 133 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:24,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:24,285 INFO L82 PathProgramCache]: Analyzing trace with hash -1705051587, now seen corresponding path program 107 times [2020-10-09 10:39:24,285 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:24,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1031692927] [2020-10-09 10:39:24,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:24,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:24,370 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:24,370 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1031692927] [2020-10-09 10:39:24,371 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623140644] [2020-10-09 10:39:24,371 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 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 126 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:24,414 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:24,414 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:24,415 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:24,415 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:24,531 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:24,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:24,552 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:24,552 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:24,552 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1288227276] [2020-10-09 10:39:24,553 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:24,553 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:24,553 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:24,553 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:24,553 INFO L87 Difference]: Start difference. First operand 146 states and 370 transitions. Second operand 15 states. [2020-10-09 10:39:25,357 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:25,357 INFO L93 Difference]: Finished difference Result 246 states and 581 transitions. [2020-10-09 10:39:25,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:39:25,358 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:25,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:25,359 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:39:25,359 INFO L226 Difference]: Without dead ends: 238 [2020-10-09 10:39:25,360 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 348 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=384, Invalid=876, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:39:25,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 238 states. [2020-10-09 10:39:25,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 238 to 139. [2020-10-09 10:39:25,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:39:25,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 344 transitions. [2020-10-09 10:39:25,364 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 344 transitions. Word has length 13 [2020-10-09 10:39:25,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:25,364 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 344 transitions. [2020-10-09 10:39:25,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:25,364 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 344 transitions. [2020-10-09 10:39:25,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:25,365 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:25,365 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:25,575 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 126 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable132 [2020-10-09 10:39:25,575 INFO L429 AbstractCegarLoop]: === Iteration 134 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:25,576 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:25,576 INFO L82 PathProgramCache]: Analyzing trace with hash -1704843267, now seen corresponding path program 108 times [2020-10-09 10:39:25,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:25,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49998576] [2020-10-09 10:39:25,577 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:25,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:25,661 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:25,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49998576] [2020-10-09 10:39:25,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1039263294] [2020-10-09 10:39:25,661 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 127 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:25,699 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:25,699 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:25,699 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:25,700 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:25,835 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:25,835 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:25,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:25,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1847401945] [2020-10-09 10:39:25,836 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:25,836 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:25,836 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:25,837 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:25,837 INFO L87 Difference]: Start difference. First operand 139 states and 344 transitions. Second operand 15 states. [2020-10-09 10:39:26,261 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:26,261 INFO L93 Difference]: Finished difference Result 208 states and 483 transitions. [2020-10-09 10:39:26,261 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:39:26,262 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:26,262 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:26,262 INFO L225 Difference]: With dead ends: 208 [2020-10-09 10:39:26,262 INFO L226 Difference]: Without dead ends: 206 [2020-10-09 10:39:26,262 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 159 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=205, Invalid=497, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:39:26,263 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-09 10:39:26,264 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 136. [2020-10-09 10:39:26,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 136 states. [2020-10-09 10:39:26,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 136 states to 136 states and 337 transitions. [2020-10-09 10:39:26,265 INFO L78 Accepts]: Start accepts. Automaton has 136 states and 337 transitions. Word has length 13 [2020-10-09 10:39:26,265 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:26,265 INFO L481 AbstractCegarLoop]: Abstraction has 136 states and 337 transitions. [2020-10-09 10:39:26,265 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:26,265 INFO L276 IsEmpty]: Start isEmpty. Operand 136 states and 337 transitions. [2020-10-09 10:39:26,265 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:26,265 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:26,265 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:26,466 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 127 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable133 [2020-10-09 10:39:26,466 INFO L429 AbstractCegarLoop]: === Iteration 135 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:26,466 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:26,467 INFO L82 PathProgramCache]: Analyzing trace with hash -1704180177, now seen corresponding path program 109 times [2020-10-09 10:39:26,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:26,467 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1186631534] [2020-10-09 10:39:26,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:26,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:26,552 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:26,552 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1186631534] [2020-10-09 10:39:26,553 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [207985896] [2020-10-09 10:39:26,553 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 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 128 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:26,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:26,594 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:26,595 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:26,716 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:26,717 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:26,717 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:26,717 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1468308697] [2020-10-09 10:39:26,718 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:26,718 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:26,718 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:26,718 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=151, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:26,719 INFO L87 Difference]: Start difference. First operand 136 states and 337 transitions. Second operand 15 states. [2020-10-09 10:39:27,257 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:27,257 INFO L93 Difference]: Finished difference Result 215 states and 507 transitions. [2020-10-09 10:39:27,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:39:27,258 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:27,258 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:27,259 INFO L225 Difference]: With dead ends: 215 [2020-10-09 10:39:27,259 INFO L226 Difference]: Without dead ends: 213 [2020-10-09 10:39:27,259 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 192 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=265, Invalid=605, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:39:27,259 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 213 states. [2020-10-09 10:39:27,261 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 213 to 137. [2020-10-09 10:39:27,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:39:27,262 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-09 10:39:27,262 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-09 10:39:27,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:27,262 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-09 10:39:27,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:27,262 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-09 10:39:27,263 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:27,263 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:27,263 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:27,463 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 128 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable134 [2020-10-09 10:39:27,464 INFO L429 AbstractCegarLoop]: === Iteration 136 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:27,464 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:27,464 INFO L82 PathProgramCache]: Analyzing trace with hash -1704158818, now seen corresponding path program 110 times [2020-10-09 10:39:27,464 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:27,465 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [123201096] [2020-10-09 10:39:27,465 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:27,469 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:27,559 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:27,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [123201096] [2020-10-09 10:39:27,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [131879924] [2020-10-09 10:39:27,559 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 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 129 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:27,600 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:27,600 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:27,601 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:27,601 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:27,720 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:27,732 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:27,733 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:27,733 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:27,734 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [127473511] [2020-10-09 10:39:27,734 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:27,734 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:27,734 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:27,735 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:27,735 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-09 10:39:28,349 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:28,349 INFO L93 Difference]: Finished difference Result 236 states and 563 transitions. [2020-10-09 10:39:28,350 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:39:28,350 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:28,350 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:28,350 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:39:28,351 INFO L226 Difference]: Without dead ends: 228 [2020-10-09 10:39:28,351 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 296 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=343, Invalid=779, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:39:28,352 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 228 states. [2020-10-09 10:39:28,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 228 to 137. [2020-10-09 10:39:28,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-09 10:39:28,354 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 341 transitions. [2020-10-09 10:39:28,354 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 341 transitions. Word has length 13 [2020-10-09 10:39:28,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:28,354 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 341 transitions. [2020-10-09 10:39:28,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:28,354 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 341 transitions. [2020-10-09 10:39:28,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:28,354 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:28,354 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:28,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 129 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable135 [2020-10-09 10:39:28,555 INFO L429 AbstractCegarLoop]: === Iteration 137 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:28,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:28,556 INFO L82 PathProgramCache]: Analyzing trace with hash -1704157857, now seen corresponding path program 111 times [2020-10-09 10:39:28,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:28,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999327256] [2020-10-09 10:39:28,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:28,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:28,642 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:28,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999327256] [2020-10-09 10:39:28,643 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1001761556] [2020-10-09 10:39:28,643 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 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 130 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:28,683 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:28,683 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:28,684 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:28,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:28,802 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:28,812 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:28,813 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:28,813 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:28,813 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1174226324] [2020-10-09 10:39:28,813 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:28,813 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:28,814 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:28,814 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:28,814 INFO L87 Difference]: Start difference. First operand 137 states and 341 transitions. Second operand 15 states. [2020-10-09 10:39:29,473 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:29,473 INFO L93 Difference]: Finished difference Result 241 states and 576 transitions. [2020-10-09 10:39:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:39:29,476 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:29,476 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:29,477 INFO L225 Difference]: With dead ends: 241 [2020-10-09 10:39:29,477 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:39:29,477 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 270 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=349, Invalid=773, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:39:29,478 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:39:29,480 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 133. [2020-10-09 10:39:29,480 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-09 10:39:29,480 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 324 transitions. [2020-10-09 10:39:29,480 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 324 transitions. Word has length 13 [2020-10-09 10:39:29,481 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:29,481 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 324 transitions. [2020-10-09 10:39:29,481 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:29,481 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 324 transitions. [2020-10-09 10:39:29,481 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:29,481 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:29,481 INFO L421 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:29,682 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 130 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable136 [2020-10-09 10:39:29,682 INFO L429 AbstractCegarLoop]: === Iteration 138 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:29,683 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:29,683 INFO L82 PathProgramCache]: Analyzing trace with hash -1704129027, now seen corresponding path program 112 times [2020-10-09 10:39:29,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:29,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1324898277] [2020-10-09 10:39:29,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:29,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:29,767 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:29,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1324898277] [2020-10-09 10:39:29,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [396458859] [2020-10-09 10:39:29,767 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 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 131 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:29,808 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:29,808 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:29,809 INFO L263 TraceCheckSpWp]: Trace formula consists of 89 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-09 10:39:29,810 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:29,932 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:29,946 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:29,947 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:29,947 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-09 10:39:29,947 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206187234] [2020-10-09 10:39:29,947 INFO L461 AbstractCegarLoop]: Interpolant automaton has 15 states [2020-10-09 10:39:29,947 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:29,948 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2020-10-09 10:39:29,948 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-09 10:39:29,948 INFO L87 Difference]: Start difference. First operand 133 states and 324 transitions. Second operand 15 states. [2020-10-09 10:39:30,601 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:30,601 INFO L93 Difference]: Finished difference Result 232 states and 545 transitions. [2020-10-09 10:39:30,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:39:30,602 INFO L78 Accepts]: Start accepts. Automaton has 15 states. Word has length 13 [2020-10-09 10:39:30,602 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:30,603 INFO L225 Difference]: With dead ends: 232 [2020-10-09 10:39:30,604 INFO L226 Difference]: Without dead ends: 224 [2020-10-09 10:39:30,604 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 261 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=325, Invalid=731, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:39:30,605 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-09 10:39:30,607 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 130. [2020-10-09 10:39:30,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-09 10:39:30,608 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 305 transitions. [2020-10-09 10:39:30,608 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 305 transitions. Word has length 13 [2020-10-09 10:39:30,608 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:30,608 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 305 transitions. [2020-10-09 10:39:30,608 INFO L482 AbstractCegarLoop]: Interpolant automaton has 15 states. [2020-10-09 10:39:30,609 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 305 transitions. [2020-10-09 10:39:30,609 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:30,609 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:30,609 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:30,818 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137,131 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:30,818 INFO L429 AbstractCegarLoop]: === Iteration 139 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:30,819 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:30,819 INFO L82 PathProgramCache]: Analyzing trace with hash 1141268816, now seen corresponding path program 6 times [2020-10-09 10:39:30,819 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:30,819 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437539593] [2020-10-09 10:39:30,819 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:30,822 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:30,930 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:30,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437539593] [2020-10-09 10:39:30,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1670575919] [2020-10-09 10:39:30,931 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 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 132 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:30,968 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:39:30,969 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:30,969 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:30,970 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:31,144 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:39:31,178 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:31,178 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:31,178 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:39:31,178 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404069700] [2020-10-09 10:39:31,179 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:39:31,179 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:31,179 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:39:31,179 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=223, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:39:31,179 INFO L87 Difference]: Start difference. First operand 130 states and 305 transitions. Second operand 18 states. [2020-10-09 10:39:31,425 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:31,426 INFO L93 Difference]: Finished difference Result 185 states and 431 transitions. [2020-10-09 10:39:31,426 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:39:31,426 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 13 [2020-10-09 10:39:31,426 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:31,427 INFO L225 Difference]: With dead ends: 185 [2020-10-09 10:39:31,427 INFO L226 Difference]: Without dead ends: 180 [2020-10-09 10:39:31,427 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:31,428 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-09 10:39:31,431 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 139. [2020-10-09 10:39:31,431 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 139 states. [2020-10-09 10:39:31,431 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 139 states to 139 states and 341 transitions. [2020-10-09 10:39:31,432 INFO L78 Accepts]: Start accepts. Automaton has 139 states and 341 transitions. Word has length 13 [2020-10-09 10:39:31,432 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:31,432 INFO L481 AbstractCegarLoop]: Abstraction has 139 states and 341 transitions. [2020-10-09 10:39:31,432 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:39:31,432 INFO L276 IsEmpty]: Start isEmpty. Operand 139 states and 341 transitions. [2020-10-09 10:39:31,433 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:31,433 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:31,433 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:31,641 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 132 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable138 [2020-10-09 10:39:31,641 INFO L429 AbstractCegarLoop]: === Iteration 140 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:31,642 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:31,642 INFO L82 PathProgramCache]: Analyzing trace with hash 33766584, now seen corresponding path program 21 times [2020-10-09 10:39:31,642 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:31,642 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62056788] [2020-10-09 10:39:31,642 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:31,648 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:31,817 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:31,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62056788] [2020-10-09 10:39:31,818 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [670767144] [2020-10-09 10:39:31,818 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 133 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:31,858 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:39:31,858 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:31,859 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:31,860 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:32,061 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:32,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:32,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:32,062 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1121578196] [2020-10-09 10:39:32,062 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:32,062 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:32,062 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:32,062 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:32,062 INFO L87 Difference]: Start difference. First operand 139 states and 341 transitions. Second operand 17 states. [2020-10-09 10:39:32,129 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:32,129 INFO L93 Difference]: Finished difference Result 180 states and 423 transitions. [2020-10-09 10:39:32,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:39:32,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:39:32,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:32,130 INFO L225 Difference]: With dead ends: 180 [2020-10-09 10:39:32,130 INFO L226 Difference]: Without dead ends: 177 [2020-10-09 10:39:32,131 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 20 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:32,131 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 177 states. [2020-10-09 10:39:32,133 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 177 to 148. [2020-10-09 10:39:32,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-09 10:39:32,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-09 10:39:32,134 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-09 10:39:32,134 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:32,134 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-09 10:39:32,135 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:32,135 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-09 10:39:32,135 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:32,135 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:32,135 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:32,336 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 133 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable139 [2020-10-09 10:39:32,336 INFO L429 AbstractCegarLoop]: === Iteration 141 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:32,336 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:32,337 INFO L82 PathProgramCache]: Analyzing trace with hash -913710200, now seen corresponding path program 22 times [2020-10-09 10:39:32,337 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:32,337 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1105627299] [2020-10-09 10:39:32,337 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:32,341 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:32,497 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:32,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1105627299] [2020-10-09 10:39:32,497 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [414463981] [2020-10-09 10:39:32,498 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 134 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:32,534 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:32,534 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:32,535 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:32,535 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:32,731 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:32,731 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:32,731 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:32,731 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1464206172] [2020-10-09 10:39:32,732 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:32,732 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:32,732 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:32,732 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:32,732 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-09 10:39:32,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:32,826 INFO L93 Difference]: Finished difference Result 197 states and 456 transitions. [2020-10-09 10:39:32,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:39:32,827 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:39:32,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:32,827 INFO L225 Difference]: With dead ends: 197 [2020-10-09 10:39:32,827 INFO L226 Difference]: Without dead ends: 194 [2020-10-09 10:39:32,828 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:39:32,828 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 194 states. [2020-10-09 10:39:32,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 194 to 148. [2020-10-09 10:39:32,830 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 148 states. [2020-10-09 10:39:32,830 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 148 states to 148 states and 362 transitions. [2020-10-09 10:39:32,830 INFO L78 Accepts]: Start accepts. Automaton has 148 states and 362 transitions. Word has length 13 [2020-10-09 10:39:32,831 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:32,831 INFO L481 AbstractCegarLoop]: Abstraction has 148 states and 362 transitions. [2020-10-09 10:39:32,831 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:32,831 INFO L276 IsEmpty]: Start isEmpty. Operand 148 states and 362 transitions. [2020-10-09 10:39:32,831 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:32,831 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:32,832 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:33,039 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140,134 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:33,040 INFO L429 AbstractCegarLoop]: === Iteration 142 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:33,040 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:33,040 INFO L82 PathProgramCache]: Analyzing trace with hash -1775557960, now seen corresponding path program 23 times [2020-10-09 10:39:33,040 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:33,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [840302530] [2020-10-09 10:39:33,041 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:33,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:33,179 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:33,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [840302530] [2020-10-09 10:39:33,180 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1135126707] [2020-10-09 10:39:33,180 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 135 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:33,217 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 10:39:33,217 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:33,218 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:33,219 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:33,428 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:33,428 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:33,428 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:33,428 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1955384145] [2020-10-09 10:39:33,428 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:33,428 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:33,429 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:33,429 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:33,429 INFO L87 Difference]: Start difference. First operand 148 states and 362 transitions. Second operand 17 states. [2020-10-09 10:39:33,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:33,544 INFO L93 Difference]: Finished difference Result 196 states and 456 transitions. [2020-10-09 10:39:33,545 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:39:33,545 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:39:33,545 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:33,545 INFO L225 Difference]: With dead ends: 196 [2020-10-09 10:39:33,546 INFO L226 Difference]: Without dead ends: 193 [2020-10-09 10:39:33,546 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:39:33,546 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 193 states. [2020-10-09 10:39:33,548 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 193 to 149. [2020-10-09 10:39:33,548 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 149 states. [2020-10-09 10:39:33,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 149 states to 149 states and 367 transitions. [2020-10-09 10:39:33,549 INFO L78 Accepts]: Start accepts. Automaton has 149 states and 367 transitions. Word has length 13 [2020-10-09 10:39:33,549 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:33,549 INFO L481 AbstractCegarLoop]: Abstraction has 149 states and 367 transitions. [2020-10-09 10:39:33,549 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:33,549 INFO L276 IsEmpty]: Start isEmpty. Operand 149 states and 367 transitions. [2020-10-09 10:39:33,549 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:33,550 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:33,550 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:33,750 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141,135 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:33,750 INFO L429 AbstractCegarLoop]: === Iteration 143 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:33,751 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:33,751 INFO L82 PathProgramCache]: Analyzing trace with hash -1110622840, now seen corresponding path program 24 times [2020-10-09 10:39:33,751 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:33,751 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1366769835] [2020-10-09 10:39:33,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:33,756 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:33,887 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:33,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1366769835] [2020-10-09 10:39:33,887 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1553816225] [2020-10-09 10:39:33,887 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 136 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:33,926 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:39:33,926 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:33,927 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:33,928 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:34,118 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:34,118 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:34,118 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:34,119 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2117780432] [2020-10-09 10:39:34,119 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:34,119 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:34,119 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:34,120 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:34,120 INFO L87 Difference]: Start difference. First operand 149 states and 367 transitions. Second operand 17 states. [2020-10-09 10:39:34,266 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:34,267 INFO L93 Difference]: Finished difference Result 195 states and 456 transitions. [2020-10-09 10:39:34,267 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:39:34,268 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:39:34,268 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:34,269 INFO L225 Difference]: With dead ends: 195 [2020-10-09 10:39:34,269 INFO L226 Difference]: Without dead ends: 192 [2020-10-09 10:39:34,269 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:39:34,270 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-09 10:39:34,272 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 150. [2020-10-09 10:39:34,272 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 150 states. [2020-10-09 10:39:34,272 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 150 states to 150 states and 372 transitions. [2020-10-09 10:39:34,272 INFO L78 Accepts]: Start accepts. Automaton has 150 states and 372 transitions. Word has length 13 [2020-10-09 10:39:34,273 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:34,273 INFO L481 AbstractCegarLoop]: Abstraction has 150 states and 372 transitions. [2020-10-09 10:39:34,273 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:34,273 INFO L276 IsEmpty]: Start isEmpty. Operand 150 states and 372 transitions. [2020-10-09 10:39:34,273 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:34,273 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:34,273 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:34,474 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142,136 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:34,474 INFO L429 AbstractCegarLoop]: === Iteration 144 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:34,474 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:34,475 INFO L82 PathProgramCache]: Analyzing trace with hash -1089173320, now seen corresponding path program 25 times [2020-10-09 10:39:34,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:34,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [609609553] [2020-10-09 10:39:34,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:34,479 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:34,597 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:34,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [609609553] [2020-10-09 10:39:34,598 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [451457520] [2020-10-09 10:39:34,598 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 137 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:34,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:34,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:34,635 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:34,822 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:34,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:34,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:34,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1031958975] [2020-10-09 10:39:34,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:34,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:34,824 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:34,824 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:34,824 INFO L87 Difference]: Start difference. First operand 150 states and 372 transitions. Second operand 17 states. [2020-10-09 10:39:35,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:35,017 INFO L93 Difference]: Finished difference Result 194 states and 456 transitions. [2020-10-09 10:39:35,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:39:35,018 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:39:35,018 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:35,019 INFO L225 Difference]: With dead ends: 194 [2020-10-09 10:39:35,019 INFO L226 Difference]: Without dead ends: 191 [2020-10-09 10:39:35,019 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:39:35,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-09 10:39:35,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 152. [2020-10-09 10:39:35,022 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 152 states. [2020-10-09 10:39:35,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 152 states to 152 states and 379 transitions. [2020-10-09 10:39:35,023 INFO L78 Accepts]: Start accepts. Automaton has 152 states and 379 transitions. Word has length 13 [2020-10-09 10:39:35,023 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:35,023 INFO L481 AbstractCegarLoop]: Abstraction has 152 states and 379 transitions. [2020-10-09 10:39:35,023 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:35,023 INFO L276 IsEmpty]: Start isEmpty. Operand 152 states and 379 transitions. [2020-10-09 10:39:35,024 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:35,024 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:35,024 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:35,234 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143,137 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:35,234 INFO L429 AbstractCegarLoop]: === Iteration 145 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:35,235 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:35,235 INFO L82 PathProgramCache]: Analyzing trace with hash -1088481400, now seen corresponding path program 26 times [2020-10-09 10:39:35,235 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:35,235 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1428599239] [2020-10-09 10:39:35,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:35,238 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:35,355 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:35,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1428599239] [2020-10-09 10:39:35,356 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1427855464] [2020-10-09 10:39:35,356 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 138 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:35,410 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:35,411 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:35,411 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:35,412 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:35,604 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:35,604 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:35,605 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:35,605 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [955672901] [2020-10-09 10:39:35,605 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:35,605 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:35,606 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:35,606 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:35,606 INFO L87 Difference]: Start difference. First operand 152 states and 379 transitions. Second operand 17 states. [2020-10-09 10:39:35,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:35,832 INFO L93 Difference]: Finished difference Result 193 states and 456 transitions. [2020-10-09 10:39:35,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:39:35,833 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:39:35,833 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:35,834 INFO L225 Difference]: With dead ends: 193 [2020-10-09 10:39:35,834 INFO L226 Difference]: Without dead ends: 190 [2020-10-09 10:39:35,834 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:39:35,835 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 190 states. [2020-10-09 10:39:35,837 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 190 to 154. [2020-10-09 10:39:35,837 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-09 10:39:35,837 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 386 transitions. [2020-10-09 10:39:35,837 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 386 transitions. Word has length 13 [2020-10-09 10:39:35,837 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:35,838 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 386 transitions. [2020-10-09 10:39:35,838 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:35,838 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 386 transitions. [2020-10-09 10:39:35,838 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-09 10:39:35,838 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:35,838 INFO L421 BasicCegarLoop]: trace histogram [6, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:36,038 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 138 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable144 [2020-10-09 10:39:36,039 INFO L429 AbstractCegarLoop]: === Iteration 146 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:36,039 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:36,039 INFO L82 PathProgramCache]: Analyzing trace with hash -1088459080, now seen corresponding path program 27 times [2020-10-09 10:39:36,039 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:36,040 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783667901] [2020-10-09 10:39:36,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:36,154 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:36,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783667901] [2020-10-09 10:39:36,155 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1206028995] [2020-10-09 10:39:36,155 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 139 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:36,203 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:39:36,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:36,204 INFO L263 TraceCheckSpWp]: Trace formula consists of 88 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:36,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:36,373 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:39:36,389 INFO L134 CoverageAnalysis]: Checked inductivity of 15 backedges. 0 proven. 15 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:36,389 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:36,390 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:36,390 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1719772523] [2020-10-09 10:39:36,390 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:36,390 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:36,390 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:36,390 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:36,390 INFO L87 Difference]: Start difference. First operand 154 states and 386 transitions. Second operand 17 states. [2020-10-09 10:39:36,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:36,673 INFO L93 Difference]: Finished difference Result 202 states and 480 transitions. [2020-10-09 10:39:36,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:39:36,674 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 13 [2020-10-09 10:39:36,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:36,675 INFO L225 Difference]: With dead ends: 202 [2020-10-09 10:39:36,675 INFO L226 Difference]: Without dead ends: 196 [2020-10-09 10:39:36,676 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 4 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 55 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:36,678 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-09 10:39:36,680 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 151. [2020-10-09 10:39:36,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 151 states. [2020-10-09 10:39:36,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 151 states to 151 states and 382 transitions. [2020-10-09 10:39:36,681 INFO L78 Accepts]: Start accepts. Automaton has 151 states and 382 transitions. Word has length 13 [2020-10-09 10:39:36,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:36,681 INFO L481 AbstractCegarLoop]: Abstraction has 151 states and 382 transitions. [2020-10-09 10:39:36,681 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:36,681 INFO L276 IsEmpty]: Start isEmpty. Operand 151 states and 382 transitions. [2020-10-09 10:39:36,682 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:36,682 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:36,682 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:36,891 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 139 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable145 [2020-10-09 10:39:36,891 INFO L429 AbstractCegarLoop]: === Iteration 147 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:36,892 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:36,892 INFO L82 PathProgramCache]: Analyzing trace with hash -195697579, now seen corresponding path program 113 times [2020-10-09 10:39:36,892 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:36,892 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1348200962] [2020-10-09 10:39:36,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:36,895 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:37,018 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:37,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1348200962] [2020-10-09 10:39:37,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [276996353] [2020-10-09 10:39:37,019 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 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 140 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:37,067 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:37,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:37,068 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:37,069 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:37,263 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:37,263 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:37,264 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:37,264 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1343540242] [2020-10-09 10:39:37,264 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:37,264 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:37,264 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:37,264 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:37,265 INFO L87 Difference]: Start difference. First operand 151 states and 382 transitions. Second operand 17 states. [2020-10-09 10:39:37,334 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:37,334 INFO L93 Difference]: Finished difference Result 188 states and 456 transitions. [2020-10-09 10:39:37,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-09 10:39:37,335 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:37,335 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:37,336 INFO L225 Difference]: With dead ends: 188 [2020-10-09 10:39:37,336 INFO L226 Difference]: Without dead ends: 186 [2020-10-09 10:39:37,336 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 53 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:37,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 186 states. [2020-10-09 10:39:37,340 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 186 to 159. [2020-10-09 10:39:37,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:39:37,340 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 406 transitions. [2020-10-09 10:39:37,341 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 406 transitions. Word has length 14 [2020-10-09 10:39:37,341 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:37,341 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 406 transitions. [2020-10-09 10:39:37,341 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:37,341 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 406 transitions. [2020-10-09 10:39:37,341 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:37,342 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:37,342 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:37,551 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 140 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable146 [2020-10-09 10:39:37,552 INFO L429 AbstractCegarLoop]: === Iteration 148 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:37,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:37,552 INFO L82 PathProgramCache]: Analyzing trace with hash -195696618, now seen corresponding path program 114 times [2020-10-09 10:39:37,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:37,553 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [717777608] [2020-10-09 10:39:37,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:37,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:37,678 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:37,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [717777608] [2020-10-09 10:39:37,679 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2040361053] [2020-10-09 10:39:37,679 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 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 141 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:37,718 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:37,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:37,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:37,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:37,928 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:37,929 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:37,929 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:37,929 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1191969935] [2020-10-09 10:39:37,929 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:37,929 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:37,929 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:37,930 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:37,930 INFO L87 Difference]: Start difference. First operand 159 states and 406 transitions. Second operand 17 states. [2020-10-09 10:39:38,190 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:38,190 INFO L93 Difference]: Finished difference Result 199 states and 478 transitions. [2020-10-09 10:39:38,191 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:39:38,191 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:38,191 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:38,192 INFO L225 Difference]: With dead ends: 199 [2020-10-09 10:39:38,192 INFO L226 Difference]: Without dead ends: 197 [2020-10-09 10:39:38,192 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:39:38,193 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-09 10:39:38,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 157. [2020-10-09 10:39:38,195 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-09 10:39:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-09 10:39:38,195 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-09 10:39:38,195 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:38,195 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-09 10:39:38,195 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:38,195 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-09 10:39:38,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:38,196 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:38,196 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:38,396 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 141 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable147 [2020-10-09 10:39:38,397 INFO L429 AbstractCegarLoop]: === Iteration 149 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:38,397 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:38,397 INFO L82 PathProgramCache]: Analyzing trace with hash -195667788, now seen corresponding path program 115 times [2020-10-09 10:39:38,398 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:38,398 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [573952853] [2020-10-09 10:39:38,398 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:38,402 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:38,523 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [573952853] [2020-10-09 10:39:38,523 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1443969339] [2020-10-09 10:39:38,523 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 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 142 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:38,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:38,561 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:38,562 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:38,803 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:38,803 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:38,804 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:38,804 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1735256085] [2020-10-09 10:39:38,804 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:38,804 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:38,804 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:38,804 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=88, Invalid=184, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:38,804 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-09 10:39:39,123 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:39,123 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-09 10:39:39,124 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:39:39,124 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:39,124 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:39,124 INFO L225 Difference]: With dead ends: 210 [2020-10-09 10:39:39,124 INFO L226 Difference]: Without dead ends: 208 [2020-10-09 10:39:39,125 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=174, Invalid=332, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:39:39,125 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-09 10:39:39,127 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 155. [2020-10-09 10:39:39,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 155 states. [2020-10-09 10:39:39,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 155 states to 155 states and 394 transitions. [2020-10-09 10:39:39,128 INFO L78 Accepts]: Start accepts. Automaton has 155 states and 394 transitions. Word has length 14 [2020-10-09 10:39:39,128 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:39,128 INFO L481 AbstractCegarLoop]: Abstraction has 155 states and 394 transitions. [2020-10-09 10:39:39,128 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:39,128 INFO L276 IsEmpty]: Start isEmpty. Operand 155 states and 394 transitions. [2020-10-09 10:39:39,128 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:39,128 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:39,128 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:39,329 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 142 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable148 [2020-10-09 10:39:39,329 INFO L429 AbstractCegarLoop]: === Iteration 150 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:39,330 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:39,330 INFO L82 PathProgramCache]: Analyzing trace with hash -194774058, now seen corresponding path program 116 times [2020-10-09 10:39:39,330 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:39,330 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1791983457] [2020-10-09 10:39:39,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:39,334 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:39,460 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1791983457] [2020-10-09 10:39:39,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [35023734] [2020-10-09 10:39:39,461 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 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 143 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:39,499 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:39,499 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:39,500 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:39,500 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:39,735 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:39,735 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:39,735 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:39,735 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120633375] [2020-10-09 10:39:39,736 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:39,736 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:39,736 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:39,736 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:39,736 INFO L87 Difference]: Start difference. First operand 155 states and 394 transitions. Second operand 17 states. [2020-10-09 10:39:40,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:40,109 INFO L93 Difference]: Finished difference Result 210 states and 500 transitions. [2020-10-09 10:39:40,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:39:40,110 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:40,110 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:40,110 INFO L225 Difference]: With dead ends: 210 [2020-10-09 10:39:40,110 INFO L226 Difference]: Without dead ends: 208 [2020-10-09 10:39:40,111 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:40,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 208 states. [2020-10-09 10:39:40,113 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 208 to 157. [2020-10-09 10:39:40,114 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 157 states. [2020-10-09 10:39:40,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 157 states to 157 states and 400 transitions. [2020-10-09 10:39:40,114 INFO L78 Accepts]: Start accepts. Automaton has 157 states and 400 transitions. Word has length 14 [2020-10-09 10:39:40,114 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:40,115 INFO L481 AbstractCegarLoop]: Abstraction has 157 states and 400 transitions. [2020-10-09 10:39:40,115 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:40,115 INFO L276 IsEmpty]: Start isEmpty. Operand 157 states and 400 transitions. [2020-10-09 10:39:40,115 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:40,115 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:40,115 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:40,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 143 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable149 [2020-10-09 10:39:40,325 INFO L429 AbstractCegarLoop]: === Iteration 151 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -194773097, now seen corresponding path program 117 times [2020-10-09 10:39:40,325 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:40,326 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [715180381] [2020-10-09 10:39:40,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:40,331 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:40,448 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:40,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [715180381] [2020-10-09 10:39:40,449 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [509726280] [2020-10-09 10:39:40,449 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 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 144 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:40,486 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-09 10:39:40,486 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:40,487 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:40,488 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:44,599 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:44,600 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:44,600 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:44,600 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [426080955] [2020-10-09 10:39:44,600 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:44,600 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:44,600 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:44,601 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=187, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:39:44,601 INFO L87 Difference]: Start difference. First operand 157 states and 400 transitions. Second operand 17 states. [2020-10-09 10:39:48,818 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:39:49,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:49,125 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-09 10:39:49,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:39:49,127 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:49,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:49,128 INFO L225 Difference]: With dead ends: 218 [2020-10-09 10:39:49,129 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 10:39:49,129 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=183, Invalid=368, Unknown=1, NotChecked=0, Total=552 [2020-10-09 10:39:49,130 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 10:39:49,132 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-09 10:39:49,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:39:49,133 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-09 10:39:49,133 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-09 10:39:49,133 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:49,133 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-09 10:39:49,133 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:49,133 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-09 10:39:49,134 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:49,134 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:49,134 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:49,334 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150,144 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:49,335 INFO L429 AbstractCegarLoop]: === Iteration 152 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:49,335 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:49,335 INFO L82 PathProgramCache]: Analyzing trace with hash -194744267, now seen corresponding path program 118 times [2020-10-09 10:39:49,335 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:49,335 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757921070] [2020-10-09 10:39:49,335 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:49,338 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:49,465 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:49,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757921070] [2020-10-09 10:39:49,466 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1482086824] [2020-10-09 10:39:49,466 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 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 145 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:49,503 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:49,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:49,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:49,505 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:49,849 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:49,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:49,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:49,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [917350858] [2020-10-09 10:39:49,850 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:49,851 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-09 10:39:50,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:50,286 INFO L93 Difference]: Finished difference Result 212 states and 507 transitions. [2020-10-09 10:39:50,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:39:50,287 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:50,287 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:50,288 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:39:50,288 INFO L226 Difference]: Without dead ends: 210 [2020-10-09 10:39:50,288 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=190, Invalid=362, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:50,289 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-09 10:39:50,290 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 153. [2020-10-09 10:39:50,291 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 153 states. [2020-10-09 10:39:50,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 153 states to 153 states and 388 transitions. [2020-10-09 10:39:50,291 INFO L78 Accepts]: Start accepts. Automaton has 153 states and 388 transitions. Word has length 14 [2020-10-09 10:39:50,291 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:50,291 INFO L481 AbstractCegarLoop]: Abstraction has 153 states and 388 transitions. [2020-10-09 10:39:50,291 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:50,291 INFO L276 IsEmpty]: Start isEmpty. Operand 153 states and 388 transitions. [2020-10-09 10:39:50,292 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:50,292 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:50,292 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:50,492 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151,145 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:50,493 INFO L429 AbstractCegarLoop]: === Iteration 153 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:50,493 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:50,493 INFO L82 PathProgramCache]: Analyzing trace with hash -167068428, now seen corresponding path program 119 times [2020-10-09 10:39:50,493 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:50,494 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [735160293] [2020-10-09 10:39:50,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:50,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:50,613 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:50,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [735160293] [2020-10-09 10:39:50,614 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1401624771] [2020-10-09 10:39:50,614 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 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 146 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:50,653 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:50,654 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:50,655 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:50,655 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:50,844 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:50,845 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:50,845 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:50,845 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719837875] [2020-10-09 10:39:50,845 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:50,845 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:50,845 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:50,845 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:50,846 INFO L87 Difference]: Start difference. First operand 153 states and 388 transitions. Second operand 17 states. [2020-10-09 10:39:51,215 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:51,215 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-09 10:39:51,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:39:51,216 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:51,216 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:51,217 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:39:51,217 INFO L226 Difference]: Without dead ends: 210 [2020-10-09 10:39:51,217 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=217, Invalid=433, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:39:51,218 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-09 10:39:51,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 156. [2020-10-09 10:39:51,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:39:51,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-09 10:39:51,221 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-09 10:39:51,221 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:51,221 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-09 10:39:51,221 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:51,221 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-09 10:39:51,222 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:51,222 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:51,222 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:51,422 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152,146 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:51,423 INFO L429 AbstractCegarLoop]: === Iteration 154 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:51,423 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:51,423 INFO L82 PathProgramCache]: Analyzing trace with hash -167067467, now seen corresponding path program 120 times [2020-10-09 10:39:51,423 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:51,424 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2118554774] [2020-10-09 10:39:51,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:51,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:51,544 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:51,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2118554774] [2020-10-09 10:39:51,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [868722588] [2020-10-09 10:39:51,545 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 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 147 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:51,588 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:39:51,588 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:51,589 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:51,590 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:51,783 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:51,783 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:51,783 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:51,783 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762499518] [2020-10-09 10:39:51,784 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:51,784 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:51,784 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:51,784 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:51,784 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-09 10:39:52,178 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:52,178 INFO L93 Difference]: Finished difference Result 224 states and 529 transitions. [2020-10-09 10:39:52,179 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:39:52,179 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:52,179 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:52,180 INFO L225 Difference]: With dead ends: 224 [2020-10-09 10:39:52,180 INFO L226 Difference]: Without dead ends: 222 [2020-10-09 10:39:52,180 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:39:52,180 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 222 states. [2020-10-09 10:39:52,182 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 222 to 156. [2020-10-09 10:39:52,183 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:39:52,183 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-09 10:39:52,183 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-09 10:39:52,185 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:52,185 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-09 10:39:52,185 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:52,185 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-09 10:39:52,186 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:52,186 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:52,186 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:52,394 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153,147 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:52,395 INFO L429 AbstractCegarLoop]: === Iteration 155 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:52,395 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:52,395 INFO L82 PathProgramCache]: Analyzing trace with hash -167038637, now seen corresponding path program 121 times [2020-10-09 10:39:52,395 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:52,396 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191773832] [2020-10-09 10:39:52,396 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:52,400 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:52,520 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:52,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191773832] [2020-10-09 10:39:52,520 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [778674650] [2020-10-09 10:39:52,520 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 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 148 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:52,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:52,559 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:52,560 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:52,757 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:52,758 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:52,758 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:52,758 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [583038314] [2020-10-09 10:39:52,758 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:52,759 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:52,759 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:52,759 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:52,759 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-09 10:39:53,114 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:53,114 INFO L93 Difference]: Finished difference Result 218 states and 519 transitions. [2020-10-09 10:39:53,115 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:39:53,115 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:53,115 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:53,115 INFO L225 Difference]: With dead ends: 218 [2020-10-09 10:39:53,116 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 10:39:53,116 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 147 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:53,116 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 10:39:53,118 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 156. [2020-10-09 10:39:53,118 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:39:53,119 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 397 transitions. [2020-10-09 10:39:53,119 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 397 transitions. Word has length 14 [2020-10-09 10:39:53,119 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:53,119 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 397 transitions. [2020-10-09 10:39:53,119 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:53,119 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 397 transitions. [2020-10-09 10:39:53,119 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:53,120 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:53,120 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:53,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154,148 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:53,320 INFO L429 AbstractCegarLoop]: === Iteration 156 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:53,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:53,321 INFO L82 PathProgramCache]: Analyzing trace with hash -166114155, now seen corresponding path program 122 times [2020-10-09 10:39:53,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:53,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1765385475] [2020-10-09 10:39:53,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:53,327 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:53,440 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:53,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1765385475] [2020-10-09 10:39:53,441 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [902245563] [2020-10-09 10:39:53,441 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 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 149 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:53,479 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:53,480 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:53,481 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:53,482 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:53,662 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:53,663 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:53,663 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:53,663 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [452187383] [2020-10-09 10:39:53,664 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:53,664 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:53,664 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:53,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:53,664 INFO L87 Difference]: Start difference. First operand 156 states and 397 transitions. Second operand 17 states. [2020-10-09 10:39:53,954 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:53,955 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-09 10:39:53,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:39:53,955 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:53,956 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:53,956 INFO L225 Difference]: With dead ends: 206 [2020-10-09 10:39:53,956 INFO L226 Difference]: Without dead ends: 204 [2020-10-09 10:39:53,956 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 137 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:53,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 204 states. [2020-10-09 10:39:53,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 204 to 154. [2020-10-09 10:39:53,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 154 states. [2020-10-09 10:39:53,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 154 states to 154 states and 389 transitions. [2020-10-09 10:39:53,958 INFO L78 Accepts]: Start accepts. Automaton has 154 states and 389 transitions. Word has length 14 [2020-10-09 10:39:53,958 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:53,958 INFO L481 AbstractCegarLoop]: Abstraction has 154 states and 389 transitions. [2020-10-09 10:39:53,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:53,959 INFO L276 IsEmpty]: Start isEmpty. Operand 154 states and 389 transitions. [2020-10-09 10:39:53,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:53,959 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:53,959 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:54,159 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 149 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable155 [2020-10-09 10:39:54,160 INFO L429 AbstractCegarLoop]: === Iteration 157 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:54,160 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:54,160 INFO L82 PathProgramCache]: Analyzing trace with hash 691806102, now seen corresponding path program 123 times [2020-10-09 10:39:54,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:54,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1606558460] [2020-10-09 10:39:54,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:54,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:54,291 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:54,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1606558460] [2020-10-09 10:39:54,292 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1124075451] [2020-10-09 10:39:54,292 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 150 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:54,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:39:54,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:54,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:54,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:54,526 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:54,526 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:54,526 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:54,526 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2002368794] [2020-10-09 10:39:54,526 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:54,527 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:54,527 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:54,527 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:54,527 INFO L87 Difference]: Start difference. First operand 154 states and 389 transitions. Second operand 17 states. [2020-10-09 10:39:54,831 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:54,831 INFO L93 Difference]: Finished difference Result 207 states and 495 transitions. [2020-10-09 10:39:54,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:39:54,832 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:54,832 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:54,832 INFO L225 Difference]: With dead ends: 207 [2020-10-09 10:39:54,833 INFO L226 Difference]: Without dead ends: 205 [2020-10-09 10:39:54,833 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:54,833 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 205 states. [2020-10-09 10:39:54,835 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 205 to 159. [2020-10-09 10:39:54,836 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:39:54,836 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 403 transitions. [2020-10-09 10:39:54,836 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 403 transitions. Word has length 14 [2020-10-09 10:39:54,836 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:54,836 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 403 transitions. [2020-10-09 10:39:54,836 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:54,836 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 403 transitions. [2020-10-09 10:39:54,837 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:54,837 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:54,837 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:55,037 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 150 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable156 [2020-10-09 10:39:55,038 INFO L429 AbstractCegarLoop]: === Iteration 158 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:55,038 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:55,038 INFO L82 PathProgramCache]: Analyzing trace with hash 691807063, now seen corresponding path program 124 times [2020-10-09 10:39:55,038 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:55,039 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1913730626] [2020-10-09 10:39:55,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:55,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:55,166 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:55,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1913730626] [2020-10-09 10:39:55,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [630370801] [2020-10-09 10:39:55,167 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 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 151 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:55,205 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:39:55,205 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:55,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:55,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:55,407 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:55,408 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:55,408 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:55,408 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1227668350] [2020-10-09 10:39:55,408 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:55,408 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:55,409 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:55,409 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:55,409 INFO L87 Difference]: Start difference. First operand 159 states and 403 transitions. Second operand 17 states. [2020-10-09 10:39:55,735 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:55,735 INFO L93 Difference]: Finished difference Result 217 states and 516 transitions. [2020-10-09 10:39:55,735 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:39:55,736 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:55,736 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:55,736 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:39:55,736 INFO L226 Difference]: Without dead ends: 215 [2020-10-09 10:39:55,737 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:55,737 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-09 10:39:55,739 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 158. [2020-10-09 10:39:55,739 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-09 10:39:55,740 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 400 transitions. [2020-10-09 10:39:55,740 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 400 transitions. Word has length 14 [2020-10-09 10:39:55,740 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:55,740 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 400 transitions. [2020-10-09 10:39:55,740 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:55,740 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 400 transitions. [2020-10-09 10:39:55,740 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:55,740 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:55,741 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:55,941 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 151 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable157 [2020-10-09 10:39:55,941 INFO L429 AbstractCegarLoop]: === Iteration 159 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:55,942 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:55,942 INFO L82 PathProgramCache]: Analyzing trace with hash 691835893, now seen corresponding path program 125 times [2020-10-09 10:39:55,942 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:55,942 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [78943030] [2020-10-09 10:39:55,943 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:55,947 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:56,074 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:56,074 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [78943030] [2020-10-09 10:39:56,075 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1561211626] [2020-10-09 10:39:56,075 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 152 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:56,114 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:39:56,115 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:56,116 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:56,116 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:56,412 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:56,413 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:56,413 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:56,413 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980142695] [2020-10-09 10:39:56,413 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:56,413 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:56,413 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:56,414 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:56,414 INFO L87 Difference]: Start difference. First operand 158 states and 400 transitions. Second operand 17 states. [2020-10-09 10:39:56,870 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:56,870 INFO L93 Difference]: Finished difference Result 223 states and 528 transitions. [2020-10-09 10:39:56,871 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:39:56,871 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:56,871 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:56,872 INFO L225 Difference]: With dead ends: 223 [2020-10-09 10:39:56,872 INFO L226 Difference]: Without dead ends: 221 [2020-10-09 10:39:56,872 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=197, Invalid=403, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:56,873 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-09 10:39:56,875 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 162. [2020-10-09 10:39:56,875 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:39:56,876 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 411 transitions. [2020-10-09 10:39:56,876 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 411 transitions. Word has length 14 [2020-10-09 10:39:56,876 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:56,876 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 411 transitions. [2020-10-09 10:39:56,876 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:56,877 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 411 transitions. [2020-10-09 10:39:56,877 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:56,877 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:56,877 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:57,079 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 152 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable158 [2020-10-09 10:39:57,080 INFO L429 AbstractCegarLoop]: === Iteration 160 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:57,080 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:57,080 INFO L82 PathProgramCache]: Analyzing trace with hash 692730584, now seen corresponding path program 126 times [2020-10-09 10:39:57,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:57,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1998615626] [2020-10-09 10:39:57,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:57,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:57,215 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:57,215 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1998615626] [2020-10-09 10:39:57,216 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731075849] [2020-10-09 10:39:57,216 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 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 153 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:57,255 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:39:57,255 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:57,256 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:57,257 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:57,436 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:57,437 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:57,437 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:57,437 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228699229] [2020-10-09 10:39:57,437 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:57,438 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:57,438 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:57,438 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:57,438 INFO L87 Difference]: Start difference. First operand 162 states and 411 transitions. Second operand 17 states. [2020-10-09 10:39:57,770 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:57,770 INFO L93 Difference]: Finished difference Result 225 states and 531 transitions. [2020-10-09 10:39:57,771 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:39:57,771 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:57,771 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:57,772 INFO L225 Difference]: With dead ends: 225 [2020-10-09 10:39:57,772 INFO L226 Difference]: Without dead ends: 223 [2020-10-09 10:39:57,772 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=200, Invalid=400, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:39:57,772 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-09 10:39:57,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 161. [2020-10-09 10:39:57,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:39:57,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 407 transitions. [2020-10-09 10:39:57,775 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 407 transitions. Word has length 14 [2020-10-09 10:39:57,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:57,776 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 407 transitions. [2020-10-09 10:39:57,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:57,776 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 407 transitions. [2020-10-09 10:39:57,776 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:57,776 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:57,776 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:57,976 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159,153 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:57,977 INFO L429 AbstractCegarLoop]: === Iteration 161 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:57,977 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:57,977 INFO L82 PathProgramCache]: Analyzing trace with hash 720435253, now seen corresponding path program 127 times [2020-10-09 10:39:57,978 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:57,978 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1824920304] [2020-10-09 10:39:57,978 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:57,982 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:58,116 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:58,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1824920304] [2020-10-09 10:39:58,117 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [277390965] [2020-10-09 10:39:58,117 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 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 154 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:58,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:58,156 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:58,156 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:58,362 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:58,362 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:58,362 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:58,362 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771766823] [2020-10-09 10:39:58,363 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:58,363 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:58,363 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:58,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:58,363 INFO L87 Difference]: Start difference. First operand 161 states and 407 transitions. Second operand 17 states. [2020-10-09 10:39:58,694 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:58,694 INFO L93 Difference]: Finished difference Result 214 states and 509 transitions. [2020-10-09 10:39:58,695 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:39:58,696 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:58,696 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:58,696 INFO L225 Difference]: With dead ends: 214 [2020-10-09 10:39:58,697 INFO L226 Difference]: Without dead ends: 212 [2020-10-09 10:39:58,697 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 134 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=183, Invalid=369, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:39:58,697 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 212 states. [2020-10-09 10:39:58,700 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 212 to 160. [2020-10-09 10:39:58,700 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:39:58,700 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 404 transitions. [2020-10-09 10:39:58,700 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 404 transitions. Word has length 14 [2020-10-09 10:39:58,700 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:58,701 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 404 transitions. [2020-10-09 10:39:58,701 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:58,701 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 404 transitions. [2020-10-09 10:39:58,701 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:58,701 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:58,701 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:58,901 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160,154 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:58,902 INFO L429 AbstractCegarLoop]: === Iteration 162 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:58,902 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:58,902 INFO L82 PathProgramCache]: Analyzing trace with hash 721388565, now seen corresponding path program 128 times [2020-10-09 10:39:58,903 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:58,903 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [426162096] [2020-10-09 10:39:58,903 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:58,907 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:59,072 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:59,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [426162096] [2020-10-09 10:39:59,073 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1674507525] [2020-10-09 10:39:59,073 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 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 155 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:59,111 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:39:59,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:59,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:59,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:39:59,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:59,305 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:39:59,306 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:39:59,306 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [289119933] [2020-10-09 10:39:59,306 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:39:59,306 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:39:59,306 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:39:59,307 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:39:59,307 INFO L87 Difference]: Start difference. First operand 160 states and 404 transitions. Second operand 17 states. [2020-10-09 10:39:59,552 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:39:59,552 INFO L93 Difference]: Finished difference Result 203 states and 486 transitions. [2020-10-09 10:39:59,553 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:39:59,553 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:39:59,553 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:39:59,554 INFO L225 Difference]: With dead ends: 203 [2020-10-09 10:39:59,554 INFO L226 Difference]: Without dead ends: 201 [2020-10-09 10:39:59,554 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=152, Invalid=310, Unknown=0, NotChecked=0, Total=462 [2020-10-09 10:39:59,555 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-09 10:39:59,557 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 158. [2020-10-09 10:39:59,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-09 10:39:59,558 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 397 transitions. [2020-10-09 10:39:59,558 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 397 transitions. Word has length 14 [2020-10-09 10:39:59,558 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:39:59,558 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 397 transitions. [2020-10-09 10:39:59,558 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:39:59,558 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 397 transitions. [2020-10-09 10:39:59,558 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:39:59,558 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:39:59,558 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:39:59,759 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 155 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable161 [2020-10-09 10:39:59,759 INFO L429 AbstractCegarLoop]: === Iteration 163 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:39:59,759 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:39:59,760 INFO L82 PathProgramCache]: Analyzing trace with hash -1998481017, now seen corresponding path program 129 times [2020-10-09 10:39:59,760 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:39:59,760 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [184518607] [2020-10-09 10:39:59,760 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:39:59,764 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:39:59,948 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:39:59,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [184518607] [2020-10-09 10:39:59,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1853588249] [2020-10-09 10:39:59,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 156 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:39:59,989 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:39:59,989 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:39:59,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:39:59,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:00,183 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:00,183 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:00,184 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:00,184 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677172552] [2020-10-09 10:40:00,184 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:00,184 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:00,184 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:00,184 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:00,185 INFO L87 Difference]: Start difference. First operand 158 states and 397 transitions. Second operand 17 states. [2020-10-09 10:40:00,264 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:00,264 INFO L93 Difference]: Finished difference Result 212 states and 504 transitions. [2020-10-09 10:40:00,265 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:40:00,265 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:00,265 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:00,266 INFO L225 Difference]: With dead ends: 212 [2020-10-09 10:40:00,266 INFO L226 Difference]: Without dead ends: 210 [2020-10-09 10:40:00,266 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 66 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=90, Invalid=216, Unknown=0, NotChecked=0, Total=306 [2020-10-09 10:40:00,267 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 210 states. [2020-10-09 10:40:00,269 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 210 to 166. [2020-10-09 10:40:00,269 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:40:00,269 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 421 transitions. [2020-10-09 10:40:00,269 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 421 transitions. Word has length 14 [2020-10-09 10:40:00,269 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:00,269 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 421 transitions. [2020-10-09 10:40:00,269 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:00,270 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 421 transitions. [2020-10-09 10:40:00,270 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:00,270 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:00,270 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:00,470 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162,156 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:00,471 INFO L429 AbstractCegarLoop]: === Iteration 164 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:00,471 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:00,471 INFO L82 PathProgramCache]: Analyzing trace with hash -1998480056, now seen corresponding path program 130 times [2020-10-09 10:40:00,471 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:00,472 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1999697208] [2020-10-09 10:40:00,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:00,476 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:00,670 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:00,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1999697208] [2020-10-09 10:40:00,670 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [358103362] [2020-10-09 10:40:00,670 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 157 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:00,720 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:00,720 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:00,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:00,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:00,933 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:00,934 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:00,934 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:00,934 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1755023070] [2020-10-09 10:40:00,934 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:00,934 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:00,934 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:00,934 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:00,934 INFO L87 Difference]: Start difference. First operand 166 states and 421 transitions. Second operand 17 states. [2020-10-09 10:40:01,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:01,199 INFO L93 Difference]: Finished difference Result 217 states and 513 transitions. [2020-10-09 10:40:01,199 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:40:01,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:01,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:01,200 INFO L225 Difference]: With dead ends: 217 [2020-10-09 10:40:01,200 INFO L226 Difference]: Without dead ends: 215 [2020-10-09 10:40:01,200 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:40:01,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 215 states. [2020-10-09 10:40:01,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 215 to 164. [2020-10-09 10:40:01,202 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:40:01,202 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-09 10:40:01,202 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-09 10:40:01,202 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:01,202 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-09 10:40:01,202 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:01,203 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-09 10:40:01,203 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:01,203 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:01,203 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:01,403 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163,157 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:01,404 INFO L429 AbstractCegarLoop]: === Iteration 165 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:01,404 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:01,404 INFO L82 PathProgramCache]: Analyzing trace with hash -1998451226, now seen corresponding path program 131 times [2020-10-09 10:40:01,404 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:01,405 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924007213] [2020-10-09 10:40:01,405 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:01,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:01,568 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:01,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924007213] [2020-10-09 10:40:01,569 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1697310041] [2020-10-09 10:40:01,569 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 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 158 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:01,608 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:40:01,608 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:01,609 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:01,609 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:01,880 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:01,880 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:01,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:01,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1483619509] [2020-10-09 10:40:01,881 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:01,881 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:01,881 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:01,881 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=76, Invalid=196, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:01,881 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-09 10:40:02,236 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:02,236 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-09 10:40:02,237 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:40:02,237 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:02,237 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:02,237 INFO L225 Difference]: With dead ends: 227 [2020-10-09 10:40:02,237 INFO L226 Difference]: Without dead ends: 225 [2020-10-09 10:40:02,238 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 117 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=180, Invalid=372, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:40:02,238 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-09 10:40:02,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 162. [2020-10-09 10:40:02,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:40:02,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 409 transitions. [2020-10-09 10:40:02,240 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 409 transitions. Word has length 14 [2020-10-09 10:40:02,240 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:02,240 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 409 transitions. [2020-10-09 10:40:02,240 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:02,240 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 409 transitions. [2020-10-09 10:40:02,240 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:02,240 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:02,241 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:02,441 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164,158 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:02,441 INFO L429 AbstractCegarLoop]: === Iteration 166 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:02,442 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:02,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1997557496, now seen corresponding path program 132 times [2020-10-09 10:40:02,442 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:02,442 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1513752905] [2020-10-09 10:40:02,443 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:02,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:02,578 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:02,578 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1513752905] [2020-10-09 10:40:02,579 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [4328817] [2020-10-09 10:40:02,579 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 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 159 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:02,622 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:40:02,623 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:02,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:02,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:02,867 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:02,867 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:02,867 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:02,867 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2015450412] [2020-10-09 10:40:02,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:02,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:02,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:02,868 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:02,868 INFO L87 Difference]: Start difference. First operand 162 states and 409 transitions. Second operand 17 states. [2020-10-09 10:40:03,335 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:03,335 INFO L93 Difference]: Finished difference Result 227 states and 533 transitions. [2020-10-09 10:40:03,336 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:40:03,336 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:03,336 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:03,337 INFO L225 Difference]: With dead ends: 227 [2020-10-09 10:40:03,337 INFO L226 Difference]: Without dead ends: 225 [2020-10-09 10:40:03,337 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=208, Invalid=442, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:40:03,337 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 225 states. [2020-10-09 10:40:03,339 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 225 to 164. [2020-10-09 10:40:03,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:40:03,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 415 transitions. [2020-10-09 10:40:03,339 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 415 transitions. Word has length 14 [2020-10-09 10:40:03,339 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:03,340 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 415 transitions. [2020-10-09 10:40:03,340 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:03,340 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 415 transitions. [2020-10-09 10:40:03,340 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:03,340 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:03,341 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:03,543 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 159 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable165 [2020-10-09 10:40:03,543 INFO L429 AbstractCegarLoop]: === Iteration 167 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:03,543 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:03,544 INFO L82 PathProgramCache]: Analyzing trace with hash -1997556535, now seen corresponding path program 133 times [2020-10-09 10:40:03,544 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:03,544 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1448716949] [2020-10-09 10:40:03,545 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:03,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:03,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:03,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1448716949] [2020-10-09 10:40:03,668 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [355226271] [2020-10-09 10:40:03,669 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 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 160 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:03,705 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:03,707 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:03,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:07,795 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:07,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:07,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:07,796 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1751383949] [2020-10-09 10:40:07,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:07,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:07,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:07,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=200, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:40:07,796 INFO L87 Difference]: Start difference. First operand 164 states and 415 transitions. Second operand 17 states. [2020-10-09 10:40:12,048 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:40:12,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:12,401 INFO L93 Difference]: Finished difference Result 237 states and 553 transitions. [2020-10-09 10:40:12,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:12,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:12,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:12,402 INFO L225 Difference]: With dead ends: 237 [2020-10-09 10:40:12,402 INFO L226 Difference]: Without dead ends: 235 [2020-10-09 10:40:12,403 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 8.6s TimeCoverageRelationStatistics Valid=205, Invalid=444, Unknown=1, NotChecked=0, Total=650 [2020-10-09 10:40:12,403 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-09 10:40:12,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 163. [2020-10-09 10:40:12,406 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:12,406 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-09 10:40:12,406 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-09 10:40:12,406 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:12,407 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-09 10:40:12,407 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:12,407 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-09 10:40:12,407 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:12,407 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:12,407 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:12,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 160 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable166 [2020-10-09 10:40:12,609 INFO L429 AbstractCegarLoop]: === Iteration 168 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:12,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:12,609 INFO L82 PathProgramCache]: Analyzing trace with hash -1997527705, now seen corresponding path program 134 times [2020-10-09 10:40:12,609 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:12,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767970610] [2020-10-09 10:40:12,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:12,615 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:12,752 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:12,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767970610] [2020-10-09 10:40:12,752 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228383883] [2020-10-09 10:40:12,753 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 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 161 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:12,791 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:12,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:12,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:12,793 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:13,089 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:13,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:13,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:13,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1069514660] [2020-10-09 10:40:13,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:13,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:13,090 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:13,090 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:13,090 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-09 10:40:13,602 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:13,603 INFO L93 Difference]: Finished difference Result 229 states and 539 transitions. [2020-10-09 10:40:13,603 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:13,603 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:13,603 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:13,604 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:40:13,604 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:40:13,604 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 157 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=210, Invalid=440, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:40:13,604 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:40:13,606 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-09 10:40:13,606 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:40:13,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 403 transitions. [2020-10-09 10:40:13,607 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 403 transitions. Word has length 14 [2020-10-09 10:40:13,607 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:13,607 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 403 transitions. [2020-10-09 10:40:13,607 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:13,607 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 403 transitions. [2020-10-09 10:40:13,608 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:13,608 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:13,608 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:13,808 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 161 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable167 [2020-10-09 10:40:13,808 INFO L429 AbstractCegarLoop]: === Iteration 169 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:13,809 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:13,809 INFO L82 PathProgramCache]: Analyzing trace with hash -1969851866, now seen corresponding path program 135 times [2020-10-09 10:40:13,809 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:13,809 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1933494235] [2020-10-09 10:40:13,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:13,814 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:13,930 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:13,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1933494235] [2020-10-09 10:40:13,931 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [762100755] [2020-10-09 10:40:13,931 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 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 162 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:13,971 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:13,971 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:13,972 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:13,973 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:14,174 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:14,174 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:14,175 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:14,175 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [130288278] [2020-10-09 10:40:14,175 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:14,175 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:14,176 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:14,176 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:14,176 INFO L87 Difference]: Start difference. First operand 160 states and 403 transitions. Second operand 17 states. [2020-10-09 10:40:14,660 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:14,660 INFO L93 Difference]: Finished difference Result 225 states and 529 transitions. [2020-10-09 10:40:14,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:40:14,661 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:14,661 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:14,661 INFO L225 Difference]: With dead ends: 225 [2020-10-09 10:40:14,661 INFO L226 Difference]: Without dead ends: 223 [2020-10-09 10:40:14,661 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 183 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=250, Invalid=562, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:40:14,662 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-09 10:40:14,664 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 163. [2020-10-09 10:40:14,664 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:14,664 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-09 10:40:14,664 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-09 10:40:14,664 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:14,665 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-09 10:40:14,665 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:14,665 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-09 10:40:14,665 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:14,665 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:14,665 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:14,865 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 162 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable168 [2020-10-09 10:40:14,866 INFO L429 AbstractCegarLoop]: === Iteration 170 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:14,866 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:14,866 INFO L82 PathProgramCache]: Analyzing trace with hash -1969850905, now seen corresponding path program 136 times [2020-10-09 10:40:14,867 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:14,867 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592056044] [2020-10-09 10:40:14,867 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:14,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:15,003 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:15,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592056044] [2020-10-09 10:40:15,004 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [153919889] [2020-10-09 10:40:15,004 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 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 163 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:15,043 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:15,043 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:15,045 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:15,045 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:15,287 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:15,288 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:15,288 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:15,288 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1386904491] [2020-10-09 10:40:15,289 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:15,289 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:15,289 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:15,289 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:15,290 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-09 10:40:16,078 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:16,078 INFO L93 Difference]: Finished difference Result 239 states and 557 transitions. [2020-10-09 10:40:16,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:40:16,080 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:16,080 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:16,081 INFO L225 Difference]: With dead ends: 239 [2020-10-09 10:40:16,081 INFO L226 Difference]: Without dead ends: 237 [2020-10-09 10:40:16,081 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 201 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=248, Invalid=564, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:40:16,082 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-09 10:40:16,086 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-09 10:40:16,086 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:16,087 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-09 10:40:16,087 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-09 10:40:16,087 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:16,087 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-09 10:40:16,088 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:16,088 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-09 10:40:16,088 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:16,089 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:16,089 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:16,300 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 163 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable169 [2020-10-09 10:40:16,300 INFO L429 AbstractCegarLoop]: === Iteration 171 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:16,301 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:16,301 INFO L82 PathProgramCache]: Analyzing trace with hash -1969822075, now seen corresponding path program 137 times [2020-10-09 10:40:16,301 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:16,301 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [346191033] [2020-10-09 10:40:16,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:16,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:16,427 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:16,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [346191033] [2020-10-09 10:40:16,428 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [330991896] [2020-10-09 10:40:16,428 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 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 164 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:16,465 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:40:16,466 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:16,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:16,467 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:16,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:16,666 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:16,666 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1492108365] [2020-10-09 10:40:16,666 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:16,666 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:16,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:16,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:16,667 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-09 10:40:17,102 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:17,103 INFO L93 Difference]: Finished difference Result 234 states and 550 transitions. [2020-10-09 10:40:17,104 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:40:17,104 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:17,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:17,105 INFO L225 Difference]: With dead ends: 234 [2020-10-09 10:40:17,105 INFO L226 Difference]: Without dead ends: 232 [2020-10-09 10:40:17,106 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 175 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:40:17,106 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 232 states. [2020-10-09 10:40:17,108 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 232 to 163. [2020-10-09 10:40:17,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:17,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 412 transitions. [2020-10-09 10:40:17,109 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 412 transitions. Word has length 14 [2020-10-09 10:40:17,109 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:17,109 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 412 transitions. [2020-10-09 10:40:17,109 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:17,109 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 412 transitions. [2020-10-09 10:40:17,111 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:17,111 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:17,111 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:17,320 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 164 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable170 [2020-10-09 10:40:17,321 INFO L429 AbstractCegarLoop]: === Iteration 172 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:17,321 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:17,321 INFO L82 PathProgramCache]: Analyzing trace with hash -1968897593, now seen corresponding path program 138 times [2020-10-09 10:40:17,321 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:17,322 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345783333] [2020-10-09 10:40:17,322 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:17,326 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:17,445 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:17,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345783333] [2020-10-09 10:40:17,445 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [313861087] [2020-10-09 10:40:17,445 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 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 165 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:17,484 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:40:17,484 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:17,484 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:17,485 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:17,679 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:17,680 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:17,680 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:17,680 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1814791262] [2020-10-09 10:40:17,680 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:17,680 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:17,680 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:17,681 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:17,681 INFO L87 Difference]: Start difference. First operand 163 states and 412 transitions. Second operand 17 states. [2020-10-09 10:40:18,043 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:18,044 INFO L93 Difference]: Finished difference Result 218 states and 515 transitions. [2020-10-09 10:40:18,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:18,044 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:18,045 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:18,045 INFO L225 Difference]: With dead ends: 218 [2020-10-09 10:40:18,045 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 10:40:18,045 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 145 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:40:18,046 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 10:40:18,048 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 159. [2020-10-09 10:40:18,048 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:40:18,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 399 transitions. [2020-10-09 10:40:18,049 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 399 transitions. Word has length 14 [2020-10-09 10:40:18,049 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:18,049 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 399 transitions. [2020-10-09 10:40:18,049 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:18,049 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 399 transitions. [2020-10-09 10:40:18,050 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:18,050 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:18,050 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:18,250 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171,165 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:18,251 INFO L429 AbstractCegarLoop]: === Iteration 173 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:18,251 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:18,251 INFO L82 PathProgramCache]: Analyzing trace with hash 575763989, now seen corresponding path program 139 times [2020-10-09 10:40:18,251 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:18,252 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1938463046] [2020-10-09 10:40:18,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:18,423 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:18,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1938463046] [2020-10-09 10:40:18,423 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [761612693] [2020-10-09 10:40:18,423 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 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 166 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:18,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:18,463 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:18,464 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:18,666 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:18,666 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:18,667 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:18,667 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [413992842] [2020-10-09 10:40:18,667 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:18,667 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:18,667 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:18,667 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:18,668 INFO L87 Difference]: Start difference. First operand 159 states and 399 transitions. Second operand 17 states. [2020-10-09 10:40:18,789 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:18,789 INFO L93 Difference]: Finished difference Result 208 states and 495 transitions. [2020-10-09 10:40:18,790 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-09 10:40:18,790 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:18,790 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:18,790 INFO L225 Difference]: With dead ends: 208 [2020-10-09 10:40:18,790 INFO L226 Difference]: Without dead ends: 206 [2020-10-09 10:40:18,791 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 74 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=100, Invalid=242, Unknown=0, NotChecked=0, Total=342 [2020-10-09 10:40:18,791 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 206 states. [2020-10-09 10:40:18,792 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 206 to 165. [2020-10-09 10:40:18,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:40:18,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 417 transitions. [2020-10-09 10:40:18,793 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 417 transitions. Word has length 14 [2020-10-09 10:40:18,793 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:18,793 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 417 transitions. [2020-10-09 10:40:18,793 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:18,794 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 417 transitions. [2020-10-09 10:40:18,794 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:18,794 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:18,794 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:18,994 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172,166 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:18,995 INFO L429 AbstractCegarLoop]: === Iteration 174 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:18,995 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:18,995 INFO L82 PathProgramCache]: Analyzing trace with hash 575764950, now seen corresponding path program 140 times [2020-10-09 10:40:18,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:18,996 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1376033365] [2020-10-09 10:40:18,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:19,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:19,157 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:19,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1376033365] [2020-10-09 10:40:19,157 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1623072424] [2020-10-09 10:40:19,158 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 167 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:19,202 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:19,203 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:19,203 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:19,205 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:19,409 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:19,409 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:19,409 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:19,410 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [510430847] [2020-10-09 10:40:19,410 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:19,410 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:19,410 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:19,410 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:19,411 INFO L87 Difference]: Start difference. First operand 165 states and 417 transitions. Second operand 17 states. [2020-10-09 10:40:19,728 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:19,728 INFO L93 Difference]: Finished difference Result 229 states and 536 transitions. [2020-10-09 10:40:19,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:40:19,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:19,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:19,730 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:40:19,730 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:40:19,730 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-09 10:40:19,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:40:19,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 163. [2020-10-09 10:40:19,734 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:19,734 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-09 10:40:19,734 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-09 10:40:19,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:19,734 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-09 10:40:19,735 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:19,735 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-09 10:40:19,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:19,735 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:19,735 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:19,938 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173,167 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:19,939 INFO L429 AbstractCegarLoop]: === Iteration 175 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:19,939 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:19,939 INFO L82 PathProgramCache]: Analyzing trace with hash 575793780, now seen corresponding path program 141 times [2020-10-09 10:40:19,939 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:19,940 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [612244828] [2020-10-09 10:40:19,940 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:19,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:20,080 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:20,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [612244828] [2020-10-09 10:40:20,081 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [519649310] [2020-10-09 10:40:20,081 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 168 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:20,120 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:20,120 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:20,121 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:20,121 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:20,363 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:20,364 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:20,364 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:20,364 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1587112929] [2020-10-09 10:40:20,364 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:20,364 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:20,364 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:20,364 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:20,365 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-09 10:40:20,773 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:20,773 INFO L93 Difference]: Finished difference Result 235 states and 548 transitions. [2020-10-09 10:40:20,774 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:40:20,774 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:20,774 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:20,774 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:40:20,774 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:40:20,774 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=188, Invalid=412, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:40:20,775 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:40:20,776 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 161. [2020-10-09 10:40:20,777 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:40:20,777 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 405 transitions. [2020-10-09 10:40:20,777 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 405 transitions. Word has length 14 [2020-10-09 10:40:20,777 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:20,777 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 405 transitions. [2020-10-09 10:40:20,777 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:20,777 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 405 transitions. [2020-10-09 10:40:20,778 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:20,778 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:20,778 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:20,978 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174,168 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:20,979 INFO L429 AbstractCegarLoop]: === Iteration 176 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:20,979 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:20,979 INFO L82 PathProgramCache]: Analyzing trace with hash 576687510, now seen corresponding path program 142 times [2020-10-09 10:40:20,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:20,980 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [893530181] [2020-10-09 10:40:20,980 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:20,983 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:21,101 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:21,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [893530181] [2020-10-09 10:40:21,102 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [562604632] [2020-10-09 10:40:21,102 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 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 169 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:21,141 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:21,141 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:21,141 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:21,142 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:21,400 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:21,401 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:21,401 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:21,401 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48072539] [2020-10-09 10:40:21,401 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:21,401 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:21,401 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:21,401 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:21,402 INFO L87 Difference]: Start difference. First operand 161 states and 405 transitions. Second operand 17 states. [2020-10-09 10:40:21,913 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:21,913 INFO L93 Difference]: Finished difference Result 233 states and 544 transitions. [2020-10-09 10:40:21,914 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:21,914 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:21,914 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:21,914 INFO L225 Difference]: With dead ends: 233 [2020-10-09 10:40:21,914 INFO L226 Difference]: Without dead ends: 231 [2020-10-09 10:40:21,915 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 150 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=216, Invalid=486, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:40:21,915 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-09 10:40:21,917 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 163. [2020-10-09 10:40:21,917 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:21,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 411 transitions. [2020-10-09 10:40:21,918 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 411 transitions. Word has length 14 [2020-10-09 10:40:21,918 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:21,918 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 411 transitions. [2020-10-09 10:40:21,918 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:21,918 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 411 transitions. [2020-10-09 10:40:21,919 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:21,919 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:21,919 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:22,128 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175,169 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:22,129 INFO L429 AbstractCegarLoop]: === Iteration 177 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:22,129 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:22,129 INFO L82 PathProgramCache]: Analyzing trace with hash 576688471, now seen corresponding path program 143 times [2020-10-09 10:40:22,129 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:22,129 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [802432345] [2020-10-09 10:40:22,129 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:22,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:22,256 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:22,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [802432345] [2020-10-09 10:40:22,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1681996493] [2020-10-09 10:40:22,257 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 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 170 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:22,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:22,295 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:22,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:22,296 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:26,562 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:26,562 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:26,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:26,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [322906627] [2020-10-09 10:40:26,563 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:26,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:26,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:26,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=208, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:40:26,563 INFO L87 Difference]: Start difference. First operand 163 states and 411 transitions. Second operand 17 states. [2020-10-09 10:40:30,856 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:40:31,231 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:31,231 INFO L93 Difference]: Finished difference Result 241 states and 560 transitions. [2020-10-09 10:40:31,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:40:31,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:31,232 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:31,232 INFO L225 Difference]: With dead ends: 241 [2020-10-09 10:40:31,233 INFO L226 Difference]: Without dead ends: 239 [2020-10-09 10:40:31,233 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 161 ImplicationChecksByTransitivity, 8.8s TimeCoverageRelationStatistics Valid=211, Invalid=490, Unknown=1, NotChecked=0, Total=702 [2020-10-09 10:40:31,234 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-09 10:40:31,236 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-09 10:40:31,236 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:31,236 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 410 transitions. [2020-10-09 10:40:31,236 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 410 transitions. Word has length 14 [2020-10-09 10:40:31,236 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:31,236 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 410 transitions. [2020-10-09 10:40:31,236 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:31,237 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 410 transitions. [2020-10-09 10:40:31,237 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:31,237 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:31,237 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:31,437 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176,170 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:31,438 INFO L429 AbstractCegarLoop]: === Iteration 178 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:31,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:31,438 INFO L82 PathProgramCache]: Analyzing trace with hash 576717301, now seen corresponding path program 144 times [2020-10-09 10:40:31,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:31,439 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [413883065] [2020-10-09 10:40:31,439 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:31,442 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:31,565 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [413883065] [2020-10-09 10:40:31,566 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1118330480] [2020-10-09 10:40:31,566 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 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 171 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:31,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:40:31,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:31,611 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:31,611 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:31,917 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:31,917 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:31,917 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:31,917 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173907852] [2020-10-09 10:40:31,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:31,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:31,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:31,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:31,918 INFO L87 Difference]: Start difference. First operand 163 states and 410 transitions. Second operand 17 states. [2020-10-09 10:40:32,566 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:32,567 INFO L93 Difference]: Finished difference Result 233 states and 548 transitions. [2020-10-09 10:40:32,568 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:40:32,568 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:32,568 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:32,568 INFO L225 Difference]: With dead ends: 233 [2020-10-09 10:40:32,569 INFO L226 Difference]: Without dead ends: 231 [2020-10-09 10:40:32,569 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=215, Invalid=487, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:40:32,569 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-09 10:40:32,571 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 160. [2020-10-09 10:40:32,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:40:32,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 401 transitions. [2020-10-09 10:40:32,572 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 401 transitions. Word has length 14 [2020-10-09 10:40:32,572 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:32,572 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 401 transitions. [2020-10-09 10:40:32,572 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:32,572 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 401 transitions. [2020-10-09 10:40:32,572 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:32,572 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:32,572 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:32,773 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 171 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable177 [2020-10-09 10:40:32,773 INFO L429 AbstractCegarLoop]: === Iteration 179 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:32,773 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:32,774 INFO L82 PathProgramCache]: Analyzing trace with hash 1212993479, now seen corresponding path program 145 times [2020-10-09 10:40:32,774 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:32,774 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [661739957] [2020-10-09 10:40:32,774 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:32,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:32,973 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:32,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [661739957] [2020-10-09 10:40:32,973 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [525110385] [2020-10-09 10:40:32,973 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 172 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:33,011 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:33,012 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:33,012 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:33,237 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:33,237 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:33,237 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:33,237 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478175237] [2020-10-09 10:40:33,238 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:33,238 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:33,238 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:33,238 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:33,239 INFO L87 Difference]: Start difference. First operand 160 states and 401 transitions. Second operand 17 states. [2020-10-09 10:40:33,410 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:33,410 INFO L93 Difference]: Finished difference Result 204 states and 486 transitions. [2020-10-09 10:40:33,411 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-09 10:40:33,412 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:33,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:33,412 INFO L225 Difference]: With dead ends: 204 [2020-10-09 10:40:33,412 INFO L226 Difference]: Without dead ends: 202 [2020-10-09 10:40:33,413 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=113, Invalid=267, Unknown=0, NotChecked=0, Total=380 [2020-10-09 10:40:33,413 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 202 states. [2020-10-09 10:40:33,416 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 202 to 164. [2020-10-09 10:40:33,416 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:40:33,416 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 413 transitions. [2020-10-09 10:40:33,416 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 413 transitions. Word has length 14 [2020-10-09 10:40:33,416 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:33,416 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 413 transitions. [2020-10-09 10:40:33,416 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:33,417 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 413 transitions. [2020-10-09 10:40:33,417 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:33,417 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:33,417 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:33,617 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178,172 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:33,618 INFO L429 AbstractCegarLoop]: === Iteration 180 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:33,618 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:33,618 INFO L82 PathProgramCache]: Analyzing trace with hash 1212994440, now seen corresponding path program 146 times [2020-10-09 10:40:33,618 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:33,619 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1540357339] [2020-10-09 10:40:33,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:33,623 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:33,763 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1540357339] [2020-10-09 10:40:33,763 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1807640590] [2020-10-09 10:40:33,763 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 173 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:33,800 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:33,801 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:33,802 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:33,802 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:34,003 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:34,003 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:34,003 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:34,003 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255691682] [2020-10-09 10:40:34,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:34,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:34,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:34,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:34,004 INFO L87 Difference]: Start difference. First operand 164 states and 413 transitions. Second operand 17 states. [2020-10-09 10:40:34,371 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:34,372 INFO L93 Difference]: Finished difference Result 225 states and 527 transitions. [2020-10-09 10:40:34,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:34,372 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:34,373 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:34,373 INFO L225 Difference]: With dead ends: 225 [2020-10-09 10:40:34,373 INFO L226 Difference]: Without dead ends: 223 [2020-10-09 10:40:34,373 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:40:34,374 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 223 states. [2020-10-09 10:40:34,375 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 223 to 162. [2020-10-09 10:40:34,375 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:40:34,376 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 407 transitions. [2020-10-09 10:40:34,376 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 407 transitions. Word has length 14 [2020-10-09 10:40:34,376 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:34,376 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 407 transitions. [2020-10-09 10:40:34,376 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:34,376 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 407 transitions. [2020-10-09 10:40:34,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:34,376 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:34,376 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:34,577 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 173 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable179 [2020-10-09 10:40:34,577 INFO L429 AbstractCegarLoop]: === Iteration 181 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:34,578 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:34,578 INFO L82 PathProgramCache]: Analyzing trace with hash 1213023270, now seen corresponding path program 147 times [2020-10-09 10:40:34,578 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:34,578 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203064301] [2020-10-09 10:40:34,578 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:34,582 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:34,704 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:34,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203064301] [2020-10-09 10:40:34,704 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1926811437] [2020-10-09 10:40:34,705 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 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 174 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:34,745 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:34,745 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:34,746 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:34,747 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:34,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:34,990 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:34,990 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:34,990 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1228462375] [2020-10-09 10:40:34,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:34,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:34,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:34,991 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:34,991 INFO L87 Difference]: Start difference. First operand 162 states and 407 transitions. Second operand 17 states. [2020-10-09 10:40:35,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:35,482 INFO L93 Difference]: Finished difference Result 231 states and 539 transitions. [2020-10-09 10:40:35,483 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:40:35,483 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:35,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:35,483 INFO L225 Difference]: With dead ends: 231 [2020-10-09 10:40:35,484 INFO L226 Difference]: Without dead ends: 229 [2020-10-09 10:40:35,484 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=200, Invalid=450, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:40:35,485 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-09 10:40:35,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 161. [2020-10-09 10:40:35,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:40:35,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 403 transitions. [2020-10-09 10:40:35,487 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 403 transitions. Word has length 14 [2020-10-09 10:40:35,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:35,487 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 403 transitions. [2020-10-09 10:40:35,487 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:35,487 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 403 transitions. [2020-10-09 10:40:35,487 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:35,488 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:35,488 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:35,688 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180,174 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:35,688 INFO L429 AbstractCegarLoop]: === Iteration 182 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:35,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:35,689 INFO L82 PathProgramCache]: Analyzing trace with hash 1233549269, now seen corresponding path program 148 times [2020-10-09 10:40:35,689 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:35,689 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229280936] [2020-10-09 10:40:35,690 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:35,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:35,832 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:35,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229280936] [2020-10-09 10:40:35,832 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228495802] [2020-10-09 10:40:35,832 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 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 175 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:35,871 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:35,871 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:35,872 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:35,872 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:36,090 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:36,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:36,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:36,091 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1465202159] [2020-10-09 10:40:36,091 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:36,091 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:36,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:36,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:36,092 INFO L87 Difference]: Start difference. First operand 161 states and 403 transitions. Second operand 17 states. [2020-10-09 10:40:36,404 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:36,405 INFO L93 Difference]: Finished difference Result 200 states and 477 transitions. [2020-10-09 10:40:36,406 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2020-10-09 10:40:36,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:36,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:36,408 INFO L225 Difference]: With dead ends: 200 [2020-10-09 10:40:36,408 INFO L226 Difference]: Without dead ends: 198 [2020-10-09 10:40:36,408 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=129, Invalid=291, Unknown=0, NotChecked=0, Total=420 [2020-10-09 10:40:36,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-09 10:40:36,412 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 163. [2020-10-09 10:40:36,413 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:40:36,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 409 transitions. [2020-10-09 10:40:36,414 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 409 transitions. Word has length 14 [2020-10-09 10:40:36,414 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:36,414 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 409 transitions. [2020-10-09 10:40:36,414 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:36,414 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 409 transitions. [2020-10-09 10:40:36,418 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:36,418 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:36,418 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:36,630 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181,175 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:36,630 INFO L429 AbstractCegarLoop]: === Iteration 183 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:36,630 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:36,631 INFO L82 PathProgramCache]: Analyzing trace with hash 1233550230, now seen corresponding path program 149 times [2020-10-09 10:40:36,631 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:36,631 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2005080693] [2020-10-09 10:40:36,631 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:36,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:36,753 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:36,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2005080693] [2020-10-09 10:40:36,753 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1068820616] [2020-10-09 10:40:36,753 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 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 176 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:36,791 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:40:36,791 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:36,792 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:36,792 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:36,989 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:36,989 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:36,989 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:36,989 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [209624491] [2020-10-09 10:40:36,990 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:36,990 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:36,990 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:36,990 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:36,991 INFO L87 Difference]: Start difference. First operand 163 states and 409 transitions. Second operand 17 states. [2020-10-09 10:40:37,405 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:37,405 INFO L93 Difference]: Finished difference Result 221 states and 518 transitions. [2020-10-09 10:40:37,407 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:40:37,407 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:37,407 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:37,408 INFO L225 Difference]: With dead ends: 221 [2020-10-09 10:40:37,408 INFO L226 Difference]: Without dead ends: 219 [2020-10-09 10:40:37,408 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 118 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=204, Invalid=446, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:40:37,409 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 219 states. [2020-10-09 10:40:37,411 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 219 to 162. [2020-10-09 10:40:37,411 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:40:37,411 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 405 transitions. [2020-10-09 10:40:37,411 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 405 transitions. Word has length 14 [2020-10-09 10:40:37,411 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:37,411 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 405 transitions. [2020-10-09 10:40:37,411 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:37,411 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 405 transitions. [2020-10-09 10:40:37,412 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:37,412 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:37,412 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:37,619 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 176 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable182 [2020-10-09 10:40:37,619 INFO L429 AbstractCegarLoop]: === Iteration 184 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:37,620 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:37,620 INFO L82 PathProgramCache]: Analyzing trace with hash 1234212359, now seen corresponding path program 150 times [2020-10-09 10:40:37,620 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:37,620 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424643610] [2020-10-09 10:40:37,620 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:37,624 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:37,755 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:37,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424643610] [2020-10-09 10:40:37,755 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2011901907] [2020-10-09 10:40:37,755 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 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 177 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:37,792 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:40:37,793 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:37,794 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 13 conjunts are in the unsatisfiable core [2020-10-09 10:40:37,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:37,822 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:37,823 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:37,823 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 9 [2020-10-09 10:40:37,823 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1879637158] [2020-10-09 10:40:37,823 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-09 10:40:37,823 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:37,823 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-09 10:40:37,823 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-09 10:40:37,824 INFO L87 Difference]: Start difference. First operand 162 states and 405 transitions. Second operand 11 states. [2020-10-09 10:40:38,027 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:38,027 INFO L93 Difference]: Finished difference Result 201 states and 476 transitions. [2020-10-09 10:40:38,028 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-09 10:40:38,028 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 14 [2020-10-09 10:40:38,028 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:38,028 INFO L225 Difference]: With dead ends: 201 [2020-10-09 10:40:38,028 INFO L226 Difference]: Without dead ends: 199 [2020-10-09 10:40:38,029 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=93, Invalid=147, Unknown=0, NotChecked=0, Total=240 [2020-10-09 10:40:38,029 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 199 states. [2020-10-09 10:40:38,031 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 199 to 166. [2020-10-09 10:40:38,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:40:38,032 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-09 10:40:38,032 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-09 10:40:38,032 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:38,032 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-09 10:40:38,032 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-09 10:40:38,032 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-09 10:40:38,032 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:38,032 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:38,033 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:38,233 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183,177 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:38,233 INFO L429 AbstractCegarLoop]: === Iteration 185 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:38,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:38,234 INFO L82 PathProgramCache]: Analyzing trace with hash 1234234679, now seen corresponding path program 151 times [2020-10-09 10:40:38,234 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:38,234 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1127266001] [2020-10-09 10:40:38,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:38,240 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:38,356 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:38,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1127266001] [2020-10-09 10:40:38,357 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1780692813] [2020-10-09 10:40:38,357 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 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 178 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:38,395 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:38,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:38,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:38,590 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:38,637 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:38,637 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:38,638 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:38,638 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1271541084] [2020-10-09 10:40:38,638 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:38,638 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:38,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:38,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:38,639 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-09 10:40:39,198 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:39,198 INFO L93 Difference]: Finished difference Result 226 states and 539 transitions. [2020-10-09 10:40:39,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:40:39,199 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:39,199 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:39,199 INFO L225 Difference]: With dead ends: 226 [2020-10-09 10:40:39,199 INFO L226 Difference]: Without dead ends: 221 [2020-10-09 10:40:39,200 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 112 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:40:39,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 221 states. [2020-10-09 10:40:39,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 221 to 164. [2020-10-09 10:40:39,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:40:39,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-09 10:40:39,203 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-09 10:40:39,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:39,203 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-09 10:40:39,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:39,204 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-09 10:40:39,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:39,204 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:39,204 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:39,404 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184,178 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:39,405 INFO L429 AbstractCegarLoop]: === Iteration 186 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:39,405 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:39,405 INFO L82 PathProgramCache]: Analyzing trace with hash 1234242150, now seen corresponding path program 152 times [2020-10-09 10:40:39,406 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:39,406 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1068314565] [2020-10-09 10:40:39,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:39,410 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:39,518 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:39,518 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1068314565] [2020-10-09 10:40:39,519 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1961882288] [2020-10-09 10:40:39,519 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 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 179 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:39,557 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:39,558 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:39,558 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:39,559 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:39,794 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:39,795 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:39,795 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:39,795 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [440801721] [2020-10-09 10:40:39,796 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:39,796 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:39,796 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:39,796 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:39,796 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-09 10:40:40,263 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:40,263 INFO L93 Difference]: Finished difference Result 218 states and 517 transitions. [2020-10-09 10:40:40,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:40:40,264 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:40,264 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:40,264 INFO L225 Difference]: With dead ends: 218 [2020-10-09 10:40:40,264 INFO L226 Difference]: Without dead ends: 216 [2020-10-09 10:40:40,264 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 116 ImplicationChecksByTransitivity, 0.6s TimeCoverageRelationStatistics Valid=217, Invalid=485, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:40:40,265 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 216 states. [2020-10-09 10:40:40,267 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 216 to 166. [2020-10-09 10:40:40,267 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:40:40,267 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-09 10:40:40,267 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-09 10:40:40,267 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:40,268 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-09 10:40:40,268 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:40,268 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-09 10:40:40,268 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:40,268 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:40,268 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:40,468 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185,179 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:40,469 INFO L429 AbstractCegarLoop]: === Iteration 187 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:40,469 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:40,469 INFO L82 PathProgramCache]: Analyzing trace with hash 1234263509, now seen corresponding path program 153 times [2020-10-09 10:40:40,470 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:40,470 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1338673016] [2020-10-09 10:40:40,470 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:40,474 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:40,579 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:40,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1338673016] [2020-10-09 10:40:40,580 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1828691088] [2020-10-09 10:40:40,580 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 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 180 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:40,619 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:40,620 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:40,621 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:40,622 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:40,808 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:40,845 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:40,846 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:40,846 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:40,846 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152912560] [2020-10-09 10:40:40,846 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:40,847 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:40,847 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:40,847 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:40,847 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-09 10:40:41,578 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:41,578 INFO L93 Difference]: Finished difference Result 248 states and 590 transitions. [2020-10-09 10:40:41,579 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:40:41,579 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:41,580 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:41,580 INFO L225 Difference]: With dead ends: 248 [2020-10-09 10:40:41,580 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:40:41,581 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=323, Invalid=669, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:40:41,581 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:40:41,583 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 166. [2020-10-09 10:40:41,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:40:41,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-09 10:40:41,584 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-09 10:40:41,584 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:41,584 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-09 10:40:41,584 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:41,584 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-09 10:40:41,584 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:41,584 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:41,584 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:41,785 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186,180 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:41,785 INFO L429 AbstractCegarLoop]: === Iteration 188 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:41,785 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:41,786 INFO L82 PathProgramCache]: Analyzing trace with hash 1234264470, now seen corresponding path program 154 times [2020-10-09 10:40:41,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:41,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [369742597] [2020-10-09 10:40:41,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:41,790 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:41,900 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:41,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [369742597] [2020-10-09 10:40:41,901 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [384204285] [2020-10-09 10:40:41,901 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 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 181 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:41,937 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:40:41,937 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:41,938 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:41,939 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:42,133 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:40:42,159 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:42,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:42,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:42,160 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702379505] [2020-10-09 10:40:42,160 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:42,160 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:42,161 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:42,161 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:42,161 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-09 10:40:42,707 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:42,707 INFO L93 Difference]: Finished difference Result 238 states and 567 transitions. [2020-10-09 10:40:42,708 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:40:42,708 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:42,708 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:42,708 INFO L225 Difference]: With dead ends: 238 [2020-10-09 10:40:42,708 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:40:42,709 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 129 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=264, Invalid=548, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:40:42,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:40:42,711 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-09 10:40:42,711 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:40:42,712 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-09 10:40:42,712 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-09 10:40:42,712 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:42,712 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-09 10:40:42,712 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:42,712 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-09 10:40:42,712 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:42,713 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:42,713 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:42,913 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187,181 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:42,913 INFO L429 AbstractCegarLoop]: === Iteration 189 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:42,914 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:42,914 INFO L82 PathProgramCache]: Analyzing trace with hash 1234472790, now seen corresponding path program 155 times [2020-10-09 10:40:42,914 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:42,914 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403017403] [2020-10-09 10:40:42,915 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:42,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:43,037 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:43,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403017403] [2020-10-09 10:40:43,038 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311507160] [2020-10-09 10:40:43,038 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 182 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:43,077 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:40:43,077 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:43,078 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:43,078 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:43,344 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:43,345 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:43,345 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:43,345 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1578942779] [2020-10-09 10:40:43,345 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:43,345 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:43,346 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:43,346 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:43,346 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-09 10:40:44,015 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:44,015 INFO L93 Difference]: Finished difference Result 235 states and 547 transitions. [2020-10-09 10:40:44,016 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:40:44,016 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:44,016 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:44,016 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:40:44,017 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:40:44,017 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=201, Invalid=501, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:40:44,017 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:40:44,020 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 164. [2020-10-09 10:40:44,020 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:40:44,020 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 404 transitions. [2020-10-09 10:40:44,021 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 404 transitions. Word has length 14 [2020-10-09 10:40:44,021 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:44,021 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 404 transitions. [2020-10-09 10:40:44,021 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:44,021 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 404 transitions. [2020-10-09 10:40:44,023 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:44,023 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:44,023 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:44,232 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188,182 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:44,232 INFO L429 AbstractCegarLoop]: === Iteration 190 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:44,233 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:44,233 INFO L82 PathProgramCache]: Analyzing trace with hash 1235135880, now seen corresponding path program 156 times [2020-10-09 10:40:44,233 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:44,233 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1286849045] [2020-10-09 10:40:44,233 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:44,237 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:44,343 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:44,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1286849045] [2020-10-09 10:40:44,343 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [957941856] [2020-10-09 10:40:44,343 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 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 183 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:44,385 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:40:44,385 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:44,385 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:44,386 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:44,640 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:44,640 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:44,641 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:44,641 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [697669508] [2020-10-09 10:40:44,641 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:44,641 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:44,641 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:44,641 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:44,641 INFO L87 Difference]: Start difference. First operand 164 states and 404 transitions. Second operand 17 states. [2020-10-09 10:40:45,398 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:45,398 INFO L93 Difference]: Finished difference Result 252 states and 594 transitions. [2020-10-09 10:40:45,399 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:40:45,399 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:45,399 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:45,400 INFO L225 Difference]: With dead ends: 252 [2020-10-09 10:40:45,400 INFO L226 Difference]: Without dead ends: 250 [2020-10-09 10:40:45,400 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=272, Invalid=598, Unknown=0, NotChecked=0, Total=870 [2020-10-09 10:40:45,401 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 250 states. [2020-10-09 10:40:45,403 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 250 to 166. [2020-10-09 10:40:45,403 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:40:45,404 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 411 transitions. [2020-10-09 10:40:45,404 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 411 transitions. Word has length 14 [2020-10-09 10:40:45,404 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:45,404 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 411 transitions. [2020-10-09 10:40:45,404 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:45,404 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 411 transitions. [2020-10-09 10:40:45,404 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:45,404 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:45,405 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:45,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 183 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable189 [2020-10-09 10:40:45,605 INFO L429 AbstractCegarLoop]: === Iteration 191 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:45,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:45,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1235157239, now seen corresponding path program 157 times [2020-10-09 10:40:45,606 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:45,606 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1866761111] [2020-10-09 10:40:45,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:45,610 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:45,740 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:45,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1866761111] [2020-10-09 10:40:45,741 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [563566662] [2020-10-09 10:40:45,741 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 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 184 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:45,784 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:45,785 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:45,785 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:46,036 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:46,089 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:46,090 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:46,090 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:46,090 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [374851385] [2020-10-09 10:40:46,090 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:46,090 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:46,091 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:46,091 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=91, Invalid=181, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:40:46,091 INFO L87 Difference]: Start difference. First operand 166 states and 411 transitions. Second operand 17 states. [2020-10-09 10:40:47,119 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:47,119 INFO L93 Difference]: Finished difference Result 258 states and 617 transitions. [2020-10-09 10:40:47,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:40:47,121 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:47,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:47,121 INFO L225 Difference]: With dead ends: 258 [2020-10-09 10:40:47,121 INFO L226 Difference]: Without dead ends: 253 [2020-10-09 10:40:47,122 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 240 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=371, Invalid=751, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:40:47,122 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-09 10:40:47,124 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-09 10:40:47,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:40:47,125 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:40:47,125 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:40:47,125 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:47,125 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:40:47,125 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:47,125 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:40:47,126 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:47,126 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:47,126 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:47,327 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 184 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable190 [2020-10-09 10:40:47,328 INFO L429 AbstractCegarLoop]: === Iteration 192 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:47,328 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:47,328 INFO L82 PathProgramCache]: Analyzing trace with hash 1235158200, now seen corresponding path program 158 times [2020-10-09 10:40:47,328 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:47,329 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1295121417] [2020-10-09 10:40:47,329 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:47,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:47,464 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:47,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1295121417] [2020-10-09 10:40:47,464 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [930602520] [2020-10-09 10:40:47,465 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 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 185 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:47,504 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:40:47,504 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:47,505 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:47,506 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:49,781 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:49,850 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:49,850 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:40:49,850 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:40:49,850 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1363189153] [2020-10-09 10:40:49,851 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:40:49,851 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:40:49,851 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:40:49,851 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=86, Invalid=185, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:40:49,851 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:40:54,228 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 39 DAG size of output: 35 [2020-10-09 10:40:58,527 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 44 DAG size of output: 38 [2020-10-09 10:40:59,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:40:59,247 INFO L93 Difference]: Finished difference Result 287 states and 685 transitions. [2020-10-09 10:40:59,248 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:40:59,248 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:40:59,248 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:40:59,249 INFO L225 Difference]: With dead ends: 287 [2020-10-09 10:40:59,249 INFO L226 Difference]: Without dead ends: 279 [2020-10-09 10:40:59,249 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 265 ImplicationChecksByTransitivity, 11.5s TimeCoverageRelationStatistics Valid=370, Invalid=819, Unknown=1, NotChecked=0, Total=1190 [2020-10-09 10:40:59,250 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 279 states. [2020-10-09 10:40:59,253 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 279 to 162. [2020-10-09 10:40:59,253 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:40:59,254 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 400 transitions. [2020-10-09 10:40:59,254 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 400 transitions. Word has length 14 [2020-10-09 10:40:59,254 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:40:59,254 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 400 transitions. [2020-10-09 10:40:59,254 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:40:59,254 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 400 transitions. [2020-10-09 10:40:59,255 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:40:59,255 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:40:59,255 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:40:59,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 185 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable191 [2020-10-09 10:40:59,459 INFO L429 AbstractCegarLoop]: === Iteration 193 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:40:59,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:40:59,459 INFO L82 PathProgramCache]: Analyzing trace with hash 1235187030, now seen corresponding path program 159 times [2020-10-09 10:40:59,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:40:59,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1487451355] [2020-10-09 10:40:59,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:40:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:40:59,596 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:40:59,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1487451355] [2020-10-09 10:40:59,597 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [926417603] [2020-10-09 10:40:59,597 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 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 186 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:40:59,640 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:40:59,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:40:59,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:40:59,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:40:59,886 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:40:59,887 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:41:01,318 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:41:01,319 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:41:01,319 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:41:01,319 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2132284649] [2020-10-09 10:41:01,319 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:41:01,320 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:41:01,320 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:41:01,320 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-09 10:41:01,320 INFO L87 Difference]: Start difference. First operand 162 states and 400 transitions. Second operand 18 states. [2020-10-09 10:41:03,987 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-09 10:41:12,239 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 46 [2020-10-09 10:41:26,290 WARN L193 SmtUtils]: Spent 3.99 s on a formula simplification. DAG size of input: 55 DAG size of output: 53 [2020-10-09 10:41:35,948 WARN L193 SmtUtils]: Spent 1.56 s on a formula simplification. DAG size of input: 34 DAG size of output: 32 [2020-10-09 10:42:01,331 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:01,331 INFO L93 Difference]: Finished difference Result 283 states and 667 transitions. [2020-10-09 10:42:01,332 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:42:01,332 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-09 10:42:01,332 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:01,333 INFO L225 Difference]: With dead ends: 283 [2020-10-09 10:42:01,333 INFO L226 Difference]: Without dead ends: 278 [2020-10-09 10:42:01,333 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 302 ImplicationChecksByTransitivity, 31.0s TimeCoverageRelationStatistics Valid=391, Invalid=930, Unknown=11, NotChecked=0, Total=1332 [2020-10-09 10:42:01,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 278 states. [2020-10-09 10:42:01,336 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 278 to 160. [2020-10-09 10:42:01,336 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:42:01,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 390 transitions. [2020-10-09 10:42:01,337 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 390 transitions. Word has length 14 [2020-10-09 10:42:01,337 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:01,337 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 390 transitions. [2020-10-09 10:42:01,337 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:42:01,337 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 390 transitions. [2020-10-09 10:42:01,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:01,337 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:01,337 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:01,538 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192,186 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:01,538 INFO L429 AbstractCegarLoop]: === Iteration 194 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:01,538 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:01,539 INFO L82 PathProgramCache]: Analyzing trace with hash 1241622630, now seen corresponding path program 160 times [2020-10-09 10:42:01,539 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:01,539 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896592962] [2020-10-09 10:42:01,539 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:01,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:01,673 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:01,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896592962] [2020-10-09 10:42:01,673 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1144453728] [2020-10-09 10:42:01,674 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 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 187 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:01,714 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:42:01,715 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:01,716 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:01,716 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:02,052 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:02,052 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:02,052 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:02,053 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558119350] [2020-10-09 10:42:02,053 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:02,053 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:02,053 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:02,053 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:02,053 INFO L87 Difference]: Start difference. First operand 160 states and 390 transitions. Second operand 17 states. [2020-10-09 10:42:02,687 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:02,688 INFO L93 Difference]: Finished difference Result 235 states and 543 transitions. [2020-10-09 10:42:02,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:42:02,689 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:02,689 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:02,690 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:42:02,690 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:42:02,691 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 0.8s TimeCoverageRelationStatistics Valid=193, Invalid=509, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:42:02,691 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:42:02,693 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 163. [2020-10-09 10:42:02,693 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:42:02,694 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 401 transitions. [2020-10-09 10:42:02,694 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 401 transitions. Word has length 14 [2020-10-09 10:42:02,694 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:02,694 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 401 transitions. [2020-10-09 10:42:02,694 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:02,694 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 401 transitions. [2020-10-09 10:42:02,694 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:02,694 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:02,694 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:02,895 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193,187 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:02,895 INFO L429 AbstractCegarLoop]: === Iteration 195 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:02,896 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:02,896 INFO L82 PathProgramCache]: Analyzing trace with hash 1241623591, now seen corresponding path program 161 times [2020-10-09 10:42:02,896 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:02,896 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331689118] [2020-10-09 10:42:02,897 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:02,900 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:03,040 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:03,040 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331689118] [2020-10-09 10:42:03,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1700074413] [2020-10-09 10:42:03,041 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 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 188 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:03,079 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:42:03,080 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:03,080 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:03,081 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:06,955 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:06,955 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:06,955 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:06,955 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [966304589] [2020-10-09 10:42:06,955 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:06,956 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:06,956 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:06,956 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=212, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:42:06,956 INFO L87 Difference]: Start difference. First operand 163 states and 401 transitions. Second operand 17 states. [2020-10-09 10:42:11,361 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:42:17,874 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:17,874 INFO L93 Difference]: Finished difference Result 241 states and 556 transitions. [2020-10-09 10:42:17,875 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:42:17,875 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:17,876 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:17,876 INFO L225 Difference]: With dead ends: 241 [2020-10-09 10:42:17,876 INFO L226 Difference]: Without dead ends: 239 [2020-10-09 10:42:17,876 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 8.5s TimeCoverageRelationStatistics Valid=193, Invalid=508, Unknown=1, NotChecked=0, Total=702 [2020-10-09 10:42:17,877 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 239 states. [2020-10-09 10:42:17,878 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 239 to 163. [2020-10-09 10:42:17,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:42:17,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 400 transitions. [2020-10-09 10:42:17,879 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 400 transitions. Word has length 14 [2020-10-09 10:42:17,879 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:17,879 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 400 transitions. [2020-10-09 10:42:17,879 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:17,879 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 400 transitions. [2020-10-09 10:42:17,880 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:17,880 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:17,880 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:18,080 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 188 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable194 [2020-10-09 10:42:18,080 INFO L429 AbstractCegarLoop]: === Iteration 196 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:18,081 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:18,081 INFO L82 PathProgramCache]: Analyzing trace with hash 1241652421, now seen corresponding path program 162 times [2020-10-09 10:42:18,081 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:18,081 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1062711666] [2020-10-09 10:42:18,082 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:18,086 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:18,228 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:18,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1062711666] [2020-10-09 10:42:18,228 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1520115646] [2020-10-09 10:42:18,228 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 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 189 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:18,271 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:42:18,271 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:18,272 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:18,273 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:18,623 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:18,624 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:18,624 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:18,624 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1430192552] [2020-10-09 10:42:18,624 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:18,624 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:18,625 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:18,625 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:18,625 INFO L87 Difference]: Start difference. First operand 163 states and 400 transitions. Second operand 17 states. [2020-10-09 10:42:19,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:19,280 INFO L93 Difference]: Finished difference Result 235 states and 546 transitions. [2020-10-09 10:42:19,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:42:19,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:19,281 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:19,282 INFO L225 Difference]: With dead ends: 235 [2020-10-09 10:42:19,282 INFO L226 Difference]: Without dead ends: 233 [2020-10-09 10:42:19,283 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 146 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=192, Invalid=510, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:42:19,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 233 states. [2020-10-09 10:42:19,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 233 to 162. [2020-10-09 10:42:19,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:42:19,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 397 transitions. [2020-10-09 10:42:19,286 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 397 transitions. Word has length 14 [2020-10-09 10:42:19,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:19,286 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 397 transitions. [2020-10-09 10:42:19,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:19,286 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 397 transitions. [2020-10-09 10:42:19,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:19,286 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:19,286 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:19,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195,189 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:19,487 INFO L429 AbstractCegarLoop]: === Iteration 197 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:19,487 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:19,488 INFO L82 PathProgramCache]: Analyzing trace with hash 1262178420, now seen corresponding path program 163 times [2020-10-09 10:42:19,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:19,488 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098644597] [2020-10-09 10:42:19,488 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:19,492 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:19,634 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:19,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098644597] [2020-10-09 10:42:19,634 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354765065] [2020-10-09 10:42:19,635 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 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 190 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:19,675 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:19,676 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:19,676 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:19,987 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:19,987 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:19,987 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:19,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210066465] [2020-10-09 10:42:19,988 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:19,988 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:19,988 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:19,988 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:19,988 INFO L87 Difference]: Start difference. First operand 162 states and 397 transitions. Second operand 17 states. [2020-10-09 10:42:20,969 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:20,969 INFO L93 Difference]: Finished difference Result 254 states and 587 transitions. [2020-10-09 10:42:20,970 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:42:20,970 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:20,970 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:20,971 INFO L225 Difference]: With dead ends: 254 [2020-10-09 10:42:20,971 INFO L226 Difference]: Without dead ends: 252 [2020-10-09 10:42:20,971 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 209 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=290, Invalid=702, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:42:20,971 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-09 10:42:20,974 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 164. [2020-10-09 10:42:20,974 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:42:20,974 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 405 transitions. [2020-10-09 10:42:20,974 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 405 transitions. Word has length 14 [2020-10-09 10:42:20,974 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:20,974 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 405 transitions. [2020-10-09 10:42:20,974 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:20,974 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 405 transitions. [2020-10-09 10:42:20,975 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:20,975 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:20,975 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:21,175 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 190 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable196 [2020-10-09 10:42:21,176 INFO L429 AbstractCegarLoop]: === Iteration 198 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:21,176 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:21,176 INFO L82 PathProgramCache]: Analyzing trace with hash 1262179381, now seen corresponding path program 164 times [2020-10-09 10:42:21,176 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:21,177 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [439924395] [2020-10-09 10:42:21,177 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:21,181 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:21,336 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:21,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [439924395] [2020-10-09 10:42:21,337 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1633126927] [2020-10-09 10:42:21,337 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 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 191 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:21,376 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:42:21,376 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:21,377 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:21,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:21,884 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:21,885 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:21,885 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:21,885 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1834244786] [2020-10-09 10:42:21,885 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:21,886 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:21,886 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:21,886 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:21,886 INFO L87 Difference]: Start difference. First operand 164 states and 405 transitions. Second operand 17 states. [2020-10-09 10:42:26,407 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:42:43,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:43,329 INFO L93 Difference]: Finished difference Result 264 states and 610 transitions. [2020-10-09 10:42:43,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:42:43,330 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:43,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:43,331 INFO L225 Difference]: With dead ends: 264 [2020-10-09 10:42:43,331 INFO L226 Difference]: Without dead ends: 262 [2020-10-09 10:42:43,331 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 6 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 214 ImplicationChecksByTransitivity, 15.6s TimeCoverageRelationStatistics Valid=289, Invalid=698, Unknown=5, NotChecked=0, Total=992 [2020-10-09 10:42:43,331 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 262 states. [2020-10-09 10:42:43,334 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 262 to 165. [2020-10-09 10:42:43,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:42:43,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-09 10:42:43,335 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-09 10:42:43,335 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:43,335 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-09 10:42:43,335 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:43,335 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-09 10:42:43,335 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:43,335 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:43,335 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:43,536 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197,191 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:43,536 INFO L429 AbstractCegarLoop]: === Iteration 199 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:43,536 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:43,537 INFO L82 PathProgramCache]: Analyzing trace with hash 1262841510, now seen corresponding path program 165 times [2020-10-09 10:42:43,537 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:43,537 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100980092] [2020-10-09 10:42:43,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:43,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:43,674 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:43,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100980092] [2020-10-09 10:42:43,675 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [964142843] [2020-10-09 10:42:43,675 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 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 192 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:43,717 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:42:43,717 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:43,718 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:43,719 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:44,033 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:44,034 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:44,034 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:44,034 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1831308462] [2020-10-09 10:42:44,034 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:44,034 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:44,034 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:44,035 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:44,035 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-09 10:42:44,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:44,948 INFO L93 Difference]: Finished difference Result 255 states and 604 transitions. [2020-10-09 10:42:44,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2020-10-09 10:42:44,949 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:44,949 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:44,950 INFO L225 Difference]: With dead ends: 255 [2020-10-09 10:42:44,950 INFO L226 Difference]: Without dead ends: 253 [2020-10-09 10:42:44,951 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 210 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=313, Invalid=679, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:42:44,951 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 253 states. [2020-10-09 10:42:44,954 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 253 to 167. [2020-10-09 10:42:44,954 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:42:44,954 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:42:44,954 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:42:44,954 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:44,955 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:42:44,955 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:44,955 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:42:44,955 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:44,955 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:44,955 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:45,155 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198,192 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:45,156 INFO L429 AbstractCegarLoop]: === Iteration 200 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:45,156 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:45,156 INFO L82 PathProgramCache]: Analyzing trace with hash 1262862869, now seen corresponding path program 166 times [2020-10-09 10:42:45,157 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:45,157 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1795829012] [2020-10-09 10:42:45,157 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:45,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:45,304 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:45,304 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1795829012] [2020-10-09 10:42:45,305 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1731108941] [2020-10-09 10:42:45,305 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 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 193 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:45,344 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:42:45,344 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:45,345 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:45,346 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:45,611 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:42:45,670 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:45,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:45,671 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:42:45,671 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [162160946] [2020-10-09 10:42:45,671 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:42:45,671 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:45,672 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:42:45,672 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=87, Invalid=185, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:42:45,672 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:42:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:42:46,905 INFO L93 Difference]: Finished difference Result 256 states and 613 transitions. [2020-10-09 10:42:46,906 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:42:46,906 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:42:46,907 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:42:46,907 INFO L225 Difference]: With dead ends: 256 [2020-10-09 10:42:46,907 INFO L226 Difference]: Without dead ends: 251 [2020-10-09 10:42:46,908 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 303 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=408, Invalid=852, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:42:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-09 10:42:46,910 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 167. [2020-10-09 10:42:46,910 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:42:46,910 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:42:46,910 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:42:46,911 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:42:46,911 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:42:46,911 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:42:46,911 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:42:46,911 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:42:46,911 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:42:46,911 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:42:47,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 193 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable199 [2020-10-09 10:42:47,112 INFO L429 AbstractCegarLoop]: === Iteration 201 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:42:47,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:42:47,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1262863830, now seen corresponding path program 167 times [2020-10-09 10:42:47,113 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:42:47,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952075963] [2020-10-09 10:42:47,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:42:47,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:42:47,255 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:47,255 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952075963] [2020-10-09 10:42:47,256 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1568925333] [2020-10-09 10:42:47,256 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 194 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:42:47,295 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:42:47,296 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:42:47,296 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:42:47,297 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:42:47,617 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:42:47,636 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:42:47,642 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:42:51,719 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 27 [2020-10-09 10:42:51,720 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:42:51,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:42:51,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:42:51,721 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1305355106] [2020-10-09 10:42:51,721 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:42:51,721 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:42:51,721 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:42:51,721 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=89, Invalid=216, Unknown=1, NotChecked=0, Total=306 [2020-10-09 10:42:51,722 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 18 states. [2020-10-09 10:42:56,858 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 39 [2020-10-09 10:42:59,068 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 42 [2020-10-09 10:43:05,448 WARN L193 SmtUtils]: Spent 120.00 ms on a formula simplification. DAG size of input: 60 DAG size of output: 31 [2020-10-09 10:43:15,738 WARN L193 SmtUtils]: Spent 2.04 s on a formula simplification that was a NOOP. DAG size: 39 [2020-10-09 10:43:36,426 WARN L193 SmtUtils]: Spent 4.10 s on a formula simplification. DAG size of input: 46 DAG size of output: 42 [2020-10-09 10:44:05,860 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 34 DAG size of output: 33 [2020-10-09 10:44:36,306 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:36,307 INFO L93 Difference]: Finished difference Result 311 states and 731 transitions. [2020-10-09 10:44:36,308 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 32 states. [2020-10-09 10:44:36,308 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-09 10:44:36,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:36,309 INFO L225 Difference]: With dead ends: 311 [2020-10-09 10:44:36,309 INFO L226 Difference]: Without dead ends: 306 [2020-10-09 10:44:36,309 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 46 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 40 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 455 ImplicationChecksByTransitivity, 51.0s TimeCoverageRelationStatistics Valid=499, Invalid=1207, Unknown=16, NotChecked=0, Total=1722 [2020-10-09 10:44:36,310 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 306 states. [2020-10-09 10:44:36,312 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 306 to 165. [2020-10-09 10:44:36,312 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:44:36,313 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 409 transitions. [2020-10-09 10:44:36,313 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 409 transitions. Word has length 14 [2020-10-09 10:44:36,313 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:36,313 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 409 transitions. [2020-10-09 10:44:36,313 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:44:36,313 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 409 transitions. [2020-10-09 10:44:36,314 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:36,314 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:36,314 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:36,514 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 194 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable200 [2020-10-09 10:44:36,515 INFO L429 AbstractCegarLoop]: === Iteration 202 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:36,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:36,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1262871301, now seen corresponding path program 168 times [2020-10-09 10:44:36,515 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:36,516 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [56446994] [2020-10-09 10:44:36,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:36,520 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:36,679 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:36,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [56446994] [2020-10-09 10:44:36,680 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1237722098] [2020-10-09 10:44:36,680 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 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 195 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:36,720 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:44:36,721 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:44:36,721 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:36,722 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:39,210 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:39,211 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:39,211 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:39,211 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1001600889] [2020-10-09 10:44:39,211 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:39,211 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:39,211 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:39,212 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:44:39,212 INFO L87 Difference]: Start difference. First operand 165 states and 409 transitions. Second operand 17 states. [2020-10-09 10:44:43,664 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:44:47,983 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 41 DAG size of output: 37 [2020-10-09 10:44:48,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:44:48,861 INFO L93 Difference]: Finished difference Result 271 states and 639 transitions. [2020-10-09 10:44:48,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 10:44:48,864 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:44:48,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:44:48,865 INFO L225 Difference]: With dead ends: 271 [2020-10-09 10:44:48,865 INFO L226 Difference]: Without dead ends: 269 [2020-10-09 10:44:48,865 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 294 ImplicationChecksByTransitivity, 11.8s TimeCoverageRelationStatistics Valid=348, Invalid=841, Unknown=1, NotChecked=0, Total=1190 [2020-10-09 10:44:48,866 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-09 10:44:48,869 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 167. [2020-10-09 10:44:48,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:44:48,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:44:48,870 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:44:48,870 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:44:48,870 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:44:48,870 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:44:48,870 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:44:48,870 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:44:48,871 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:44:48,871 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:44:49,076 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 195 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable201 [2020-10-09 10:44:49,077 INFO L429 AbstractCegarLoop]: === Iteration 203 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:44:49,077 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:44:49,077 INFO L82 PathProgramCache]: Analyzing trace with hash 1262892660, now seen corresponding path program 169 times [2020-10-09 10:44:49,077 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:44:49,078 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722112252] [2020-10-09 10:44:49,078 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:44:49,083 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:49,268 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:49,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722112252] [2020-10-09 10:44:49,269 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1944269014] [2020-10-09 10:44:49,269 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 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 196 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:44:49,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:44:49,310 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:44:49,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:44:53,627 WARN L860 $PredicateComparison]: unable to prove that (exists ((aux_div_aux_mod_v_~j~0_554_43_92 Int) (v_~i~0_554 Int) (aux_div_v_~j~0_554_43 Int)) (let ((.cse0 (* 2 aux_div_aux_mod_v_~j~0_554_43_92)) (.cse1 (* 2 aux_div_v_~j~0_554_43))) (and (<= aux_div_v_~j~0_554_43 1) (<= v_~i~0_554 (+ .cse0 .cse1 3)) (<= c_~j~0 (+ .cse0 v_~i~0_554 2)) (<= (+ .cse0 .cse1 1) v_~i~0_554) (<= aux_div_aux_mod_v_~j~0_554_43_92 1) (<= c_~i~0 (+ v_~i~0_554 c_~j~0)) (<= (+ .cse1 c_~j~0) (* 2 v_~i~0_554))))) is different from true [2020-10-09 10:44:53,632 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:44:53,634 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:44:53,695 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:44:53,696 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:44:53,696 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:44:53,696 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [26195067] [2020-10-09 10:44:53,696 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:44:53,696 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:44:53,697 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:44:53,697 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=162, Unknown=2, NotChecked=28, Total=272 [2020-10-09 10:44:53,697 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:44:54,389 WARN L193 SmtUtils]: Spent 308.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 37 [2020-10-09 10:44:58,578 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 38 DAG size of output: 34 [2020-10-09 10:45:05,037 WARN L193 SmtUtils]: Spent 4.12 s on a formula simplification. DAG size of input: 43 DAG size of output: 37 [2020-10-09 10:45:11,953 WARN L193 SmtUtils]: Spent 193.00 ms on a formula simplification. DAG size of input: 56 DAG size of output: 40 [2020-10-09 10:45:22,911 WARN L193 SmtUtils]: Spent 199.00 ms on a formula simplification. DAG size of input: 30 DAG size of output: 25 [2020-10-09 10:45:30,315 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification. DAG size of input: 33 DAG size of output: 29 [2020-10-09 10:45:30,419 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:30,420 INFO L93 Difference]: Finished difference Result 292 states and 717 transitions. [2020-10-09 10:45:30,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:45:30,422 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:30,422 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:30,423 INFO L225 Difference]: With dead ends: 292 [2020-10-09 10:45:30,423 INFO L226 Difference]: Without dead ends: 287 [2020-10-09 10:45:30,423 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 53 GetRequests, 5 SyntacticMatches, 9 SemanticMatches, 39 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 503 ImplicationChecksByTransitivity, 40.7s TimeCoverageRelationStatistics Valid=482, Invalid=1073, Unknown=9, NotChecked=76, Total=1640 [2020-10-09 10:45:30,424 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 287 states. [2020-10-09 10:45:30,425 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 287 to 168. [2020-10-09 10:45:30,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 168 states. [2020-10-09 10:45:30,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 168 states to 168 states and 421 transitions. [2020-10-09 10:45:30,426 INFO L78 Accepts]: Start accepts. Automaton has 168 states and 421 transitions. Word has length 14 [2020-10-09 10:45:30,426 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:30,426 INFO L481 AbstractCegarLoop]: Abstraction has 168 states and 421 transitions. [2020-10-09 10:45:30,426 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:30,426 INFO L276 IsEmpty]: Start isEmpty. Operand 168 states and 421 transitions. [2020-10-09 10:45:30,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:30,427 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:30,427 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:30,627 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 196 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable202 [2020-10-09 10:45:30,628 INFO L429 AbstractCegarLoop]: === Iteration 204 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:30,628 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:30,629 INFO L82 PathProgramCache]: Analyzing trace with hash 1262893621, now seen corresponding path program 170 times [2020-10-09 10:45:30,629 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:30,629 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [953098985] [2020-10-09 10:45:30,629 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:30,634 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:30,812 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:30,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [953098985] [2020-10-09 10:45:30,812 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1192887429] [2020-10-09 10:45:30,813 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 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 197 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:30,854 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:45:30,854 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:30,855 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:30,856 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:33,216 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:45:33,275 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:33,275 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:33,275 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:33,275 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [128025695] [2020-10-09 10:45:33,276 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:33,276 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:33,276 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:33,276 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=189, Unknown=1, NotChecked=0, Total=272 [2020-10-09 10:45:33,276 INFO L87 Difference]: Start difference. First operand 168 states and 421 transitions. Second operand 17 states. [2020-10-09 10:45:34,099 WARN L193 SmtUtils]: Spent 117.00 ms on a formula simplification. DAG size of input: 50 DAG size of output: 38 [2020-10-09 10:45:35,613 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:35,613 INFO L93 Difference]: Finished difference Result 292 states and 701 transitions. [2020-10-09 10:45:35,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:45:35,615 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:35,615 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:35,616 INFO L225 Difference]: With dead ends: 292 [2020-10-09 10:45:35,616 INFO L226 Difference]: Without dead ends: 284 [2020-10-09 10:45:35,617 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 365 ImplicationChecksByTransitivity, 4.4s TimeCoverageRelationStatistics Valid=425, Invalid=980, Unknown=1, NotChecked=0, Total=1406 [2020-10-09 10:45:35,617 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-09 10:45:35,619 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 162. [2020-10-09 10:45:35,619 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:45:35,620 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-09 10:45:35,620 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-09 10:45:35,620 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:35,620 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-09 10:45:35,621 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:35,621 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-09 10:45:35,621 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:35,621 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:35,621 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:35,831 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 197 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable203 [2020-10-09 10:45:35,831 INFO L429 AbstractCegarLoop]: === Iteration 205 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:35,832 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:35,832 INFO L82 PathProgramCache]: Analyzing trace with hash 1263101941, now seen corresponding path program 171 times [2020-10-09 10:45:35,832 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:35,832 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003759865] [2020-10-09 10:45:35,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:35,835 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:35,977 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:35,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003759865] [2020-10-09 10:45:35,978 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [520623279] [2020-10-09 10:45:35,978 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 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 198 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:36,019 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:45:36,019 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:36,020 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:36,021 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:36,519 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:36,520 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:36,520 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:36,520 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1876156403] [2020-10-09 10:45:36,521 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:36,521 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:36,521 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:36,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=208, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:36,522 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-09 10:45:37,389 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:37,389 INFO L93 Difference]: Finished difference Result 231 states and 545 transitions. [2020-10-09 10:45:37,390 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:45:37,390 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:37,390 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:37,391 INFO L225 Difference]: With dead ends: 231 [2020-10-09 10:45:37,391 INFO L226 Difference]: Without dead ends: 229 [2020-10-09 10:45:37,391 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 141 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=202, Invalid=500, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:45:37,392 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 229 states. [2020-10-09 10:45:37,394 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 229 to 162. [2020-10-09 10:45:37,394 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:45:37,395 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 403 transitions. [2020-10-09 10:45:37,395 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 403 transitions. Word has length 14 [2020-10-09 10:45:37,395 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:37,395 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 403 transitions. [2020-10-09 10:45:37,395 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:37,395 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 403 transitions. [2020-10-09 10:45:37,396 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:37,396 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:37,396 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:37,605 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 198 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable204 [2020-10-09 10:45:37,606 INFO L429 AbstractCegarLoop]: === Iteration 206 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:37,606 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:37,606 INFO L82 PathProgramCache]: Analyzing trace with hash 1263765031, now seen corresponding path program 172 times [2020-10-09 10:45:37,607 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:37,607 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2119005794] [2020-10-09 10:45:37,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:37,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:37,781 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:37,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2119005794] [2020-10-09 10:45:37,782 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [874043731] [2020-10-09 10:45:37,782 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 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 199 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:37,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:45:37,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:37,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:37,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:38,232 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:38,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:38,233 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:38,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2109382121] [2020-10-09 10:45:38,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:38,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:38,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:38,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:38,233 INFO L87 Difference]: Start difference. First operand 162 states and 403 transitions. Second operand 17 states. [2020-10-09 10:45:39,647 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:39,647 INFO L93 Difference]: Finished difference Result 250 states and 594 transitions. [2020-10-09 10:45:39,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:45:39,649 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:39,650 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:39,650 INFO L225 Difference]: With dead ends: 250 [2020-10-09 10:45:39,650 INFO L226 Difference]: Without dead ends: 248 [2020-10-09 10:45:39,650 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 226 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=300, Invalid=692, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:45:39,651 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-09 10:45:39,652 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 163. [2020-10-09 10:45:39,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:45:39,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 405 transitions. [2020-10-09 10:45:39,653 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 405 transitions. Word has length 14 [2020-10-09 10:45:39,653 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:39,653 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 405 transitions. [2020-10-09 10:45:39,654 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:39,654 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 405 transitions. [2020-10-09 10:45:39,654 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:39,654 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:39,654 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:39,854 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable205,199 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:39,855 INFO L429 AbstractCegarLoop]: === Iteration 207 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:39,855 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:39,855 INFO L82 PathProgramCache]: Analyzing trace with hash 1263787351, now seen corresponding path program 173 times [2020-10-09 10:45:39,856 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:39,856 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885576943] [2020-10-09 10:45:39,856 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:39,860 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:40,056 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:40,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885576943] [2020-10-09 10:45:40,057 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1746533311] [2020-10-09 10:45:40,057 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 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 200 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:40,110 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:45:40,111 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:40,112 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:40,113 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:40,500 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:45:40,546 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:40,547 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:40,547 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:40,547 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210938013] [2020-10-09 10:45:40,547 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:40,547 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:40,548 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:40,548 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=84, Invalid=188, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:40,548 INFO L87 Difference]: Start difference. First operand 163 states and 405 transitions. Second operand 17 states. [2020-10-09 10:45:42,413 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:42,413 INFO L93 Difference]: Finished difference Result 288 states and 686 transitions. [2020-10-09 10:45:42,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:45:42,415 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:42,415 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:42,416 INFO L225 Difference]: With dead ends: 288 [2020-10-09 10:45:42,416 INFO L226 Difference]: Without dead ends: 283 [2020-10-09 10:45:42,417 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=426, Invalid=980, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:45:42,417 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-09 10:45:42,419 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 159. [2020-10-09 10:45:42,419 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:45:42,420 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 388 transitions. [2020-10-09 10:45:42,420 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 388 transitions. Word has length 14 [2020-10-09 10:45:42,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:42,420 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 388 transitions. [2020-10-09 10:45:42,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:42,420 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 388 transitions. [2020-10-09 10:45:42,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:42,420 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:42,421 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:42,621 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 200 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable206 [2020-10-09 10:45:42,621 INFO L429 AbstractCegarLoop]: === Iteration 208 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:42,622 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:42,622 INFO L82 PathProgramCache]: Analyzing trace with hash 1463267670, now seen corresponding path program 174 times [2020-10-09 10:45:42,622 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:42,622 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [461356800] [2020-10-09 10:45:42,623 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:42,626 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:42,791 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:42,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [461356800] [2020-10-09 10:45:42,791 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [646144088] [2020-10-09 10:45:42,792 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 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 201 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:42,830 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:45:42,831 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:42,831 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:42,832 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:43,146 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:43,147 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:43,147 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:43,147 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1123372784] [2020-10-09 10:45:43,147 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:43,148 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:43,148 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:43,148 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:43,148 INFO L87 Difference]: Start difference. First operand 159 states and 388 transitions. Second operand 17 states. [2020-10-09 10:45:43,894 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:43,894 INFO L93 Difference]: Finished difference Result 236 states and 544 transitions. [2020-10-09 10:45:43,897 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:45:43,897 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:43,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:43,898 INFO L225 Difference]: With dead ends: 236 [2020-10-09 10:45:43,898 INFO L226 Difference]: Without dead ends: 234 [2020-10-09 10:45:43,898 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 158 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=212, Invalid=544, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:45:43,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 234 states. [2020-10-09 10:45:43,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 234 to 163. [2020-10-09 10:45:43,901 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:45:43,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-09 10:45:43,902 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-09 10:45:43,902 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:43,902 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-09 10:45:43,902 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:43,903 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-09 10:45:43,903 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:43,903 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:43,903 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:44,111 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable207,201 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:44,112 INFO L429 AbstractCegarLoop]: === Iteration 209 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:44,112 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:44,112 INFO L82 PathProgramCache]: Analyzing trace with hash 1463268631, now seen corresponding path program 175 times [2020-10-09 10:45:44,112 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:44,113 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797589640] [2020-10-09 10:45:44,113 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:44,117 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:44,281 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:44,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797589640] [2020-10-09 10:45:44,281 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [917807256] [2020-10-09 10:45:44,281 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 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 202 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:44,322 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:44,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:44,323 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:44,693 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:44,694 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:44,694 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:44,694 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2025138501] [2020-10-09 10:45:44,694 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:44,695 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:44,695 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:44,695 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=214, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:44,695 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-09 10:45:45,459 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:45,459 INFO L93 Difference]: Finished difference Result 246 states and 565 transitions. [2020-10-09 10:45:45,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 20 states. [2020-10-09 10:45:45,462 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:45,462 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:45,463 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:45:45,463 INFO L226 Difference]: Without dead ends: 244 [2020-10-09 10:45:45,463 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=209, Invalid=547, Unknown=0, NotChecked=0, Total=756 [2020-10-09 10:45:45,464 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-09 10:45:45,466 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 163. [2020-10-09 10:45:45,466 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:45:45,467 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-09 10:45:45,467 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-09 10:45:45,467 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:45,467 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-09 10:45:45,467 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:45,467 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-09 10:45:45,467 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:45,467 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:45,467 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:45,668 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable208,202 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:45,669 INFO L429 AbstractCegarLoop]: === Iteration 210 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:45,669 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:45,669 INFO L82 PathProgramCache]: Analyzing trace with hash 1463297461, now seen corresponding path program 176 times [2020-10-09 10:45:45,669 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:45,670 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2145681930] [2020-10-09 10:45:45,670 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:45,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:45,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:45,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2145681930] [2020-10-09 10:45:45,854 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1342504179] [2020-10-09 10:45:45,854 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 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 203 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:45,894 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:45:45,894 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:45,895 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:45,895 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:46,231 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:46,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:46,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:46,232 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1092584557] [2020-10-09 10:45:46,232 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:46,232 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:46,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:46,233 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:46,233 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-09 10:45:46,923 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:46,924 INFO L93 Difference]: Finished difference Result 239 states and 554 transitions. [2020-10-09 10:45:46,925 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:45:46,925 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:46,925 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:46,926 INFO L225 Difference]: With dead ends: 239 [2020-10-09 10:45:46,926 INFO L226 Difference]: Without dead ends: 237 [2020-10-09 10:45:46,927 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 162 ImplicationChecksByTransitivity, 0.9s TimeCoverageRelationStatistics Valid=196, Invalid=506, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:45:46,927 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-09 10:45:46,929 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 163. [2020-10-09 10:45:46,930 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:45:46,930 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 402 transitions. [2020-10-09 10:45:46,930 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 402 transitions. Word has length 14 [2020-10-09 10:45:46,930 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:46,930 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 402 transitions. [2020-10-09 10:45:46,931 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:46,931 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 402 transitions. [2020-10-09 10:45:46,931 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:46,931 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:46,931 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:47,131 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable209,203 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:47,132 INFO L429 AbstractCegarLoop]: === Iteration 211 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:47,132 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:47,132 INFO L82 PathProgramCache]: Analyzing trace with hash 1464221943, now seen corresponding path program 177 times [2020-10-09 10:45:47,133 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:47,133 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [310692414] [2020-10-09 10:45:47,133 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:47,137 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:47,288 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:47,288 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [310692414] [2020-10-09 10:45:47,289 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [239315444] [2020-10-09 10:45:47,289 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 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 204 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:47,328 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:45:47,328 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:47,329 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:47,330 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:47,630 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:47,631 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:47,631 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:47,631 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [975317247] [2020-10-09 10:45:47,631 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:47,631 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:47,631 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:47,632 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:47,632 INFO L87 Difference]: Start difference. First operand 163 states and 402 transitions. Second operand 17 states. [2020-10-09 10:45:48,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:48,141 INFO L93 Difference]: Finished difference Result 229 states and 529 transitions. [2020-10-09 10:45:48,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:45:48,142 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:48,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:48,143 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:45:48,143 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:45:48,143 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 135 ImplicationChecksByTransitivity, 0.7s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:45:48,144 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:45:48,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-09 10:45:48,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:45:48,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-09 10:45:48,148 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-09 10:45:48,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:48,148 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-09 10:45:48,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:48,148 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-09 10:45:48,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:48,149 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:48,149 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:48,351 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 204 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable210 [2020-10-09 10:45:48,352 INFO L429 AbstractCegarLoop]: === Iteration 212 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:48,352 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:48,352 INFO L82 PathProgramCache]: Analyzing trace with hash 2100497160, now seen corresponding path program 178 times [2020-10-09 10:45:48,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:48,353 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392389314] [2020-10-09 10:45:48,353 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:48,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:48,515 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:48,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392389314] [2020-10-09 10:45:48,515 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890484372] [2020-10-09 10:45:48,515 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 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 205 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:48,556 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:45:48,557 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:48,557 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:48,558 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:48,881 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:48,881 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:48,881 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:48,881 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1385473067] [2020-10-09 10:45:48,882 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:48,882 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:48,882 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:48,882 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:48,882 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-09 10:45:50,076 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:50,076 INFO L93 Difference]: Finished difference Result 261 states and 599 transitions. [2020-10-09 10:45:50,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:45:50,079 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:50,079 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:50,079 INFO L225 Difference]: With dead ends: 261 [2020-10-09 10:45:50,080 INFO L226 Difference]: Without dead ends: 259 [2020-10-09 10:45:50,080 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=353, Invalid=907, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:45:50,081 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 259 states. [2020-10-09 10:45:50,082 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 259 to 164. [2020-10-09 10:45:50,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:45:50,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 406 transitions. [2020-10-09 10:45:50,083 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 406 transitions. Word has length 14 [2020-10-09 10:45:50,083 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:50,083 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 406 transitions. [2020-10-09 10:45:50,083 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:50,084 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 406 transitions. [2020-10-09 10:45:50,084 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:50,084 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:50,084 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:50,284 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable211,205 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:50,285 INFO L429 AbstractCegarLoop]: === Iteration 213 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:50,285 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:50,285 INFO L82 PathProgramCache]: Analyzing trace with hash 2100498121, now seen corresponding path program 179 times [2020-10-09 10:45:50,286 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:50,286 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [853213335] [2020-10-09 10:45:50,286 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:50,290 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:50,460 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [853213335] [2020-10-09 10:45:50,460 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1227079675] [2020-10-09 10:45:50,460 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 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 206 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:50,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:45:50,503 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:50,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:50,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:50,799 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:50,800 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:50,800 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:50,800 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [562934241] [2020-10-09 10:45:50,801 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:50,801 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:50,801 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:50,802 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=211, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:50,802 INFO L87 Difference]: Start difference. First operand 164 states and 406 transitions. Second operand 17 states. [2020-10-09 10:45:52,158 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:52,159 INFO L93 Difference]: Finished difference Result 271 states and 622 transitions. [2020-10-09 10:45:52,161 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:45:52,162 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:52,162 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:52,162 INFO L225 Difference]: With dead ends: 271 [2020-10-09 10:45:52,163 INFO L226 Difference]: Without dead ends: 269 [2020-10-09 10:45:52,163 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 246 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=296, Invalid=760, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:45:52,164 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-09 10:45:52,166 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 166. [2020-10-09 10:45:52,166 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:45:52,166 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 413 transitions. [2020-10-09 10:45:52,167 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 413 transitions. Word has length 14 [2020-10-09 10:45:52,167 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:52,167 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 413 transitions. [2020-10-09 10:45:52,167 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:52,167 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 413 transitions. [2020-10-09 10:45:52,167 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:52,168 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:52,168 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:52,377 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 206 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable212 [2020-10-09 10:45:52,377 INFO L429 AbstractCegarLoop]: === Iteration 214 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:52,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:52,378 INFO L82 PathProgramCache]: Analyzing trace with hash 2100526951, now seen corresponding path program 180 times [2020-10-09 10:45:52,378 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:52,378 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2042780959] [2020-10-09 10:45:52,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:52,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:52,504 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:52,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2042780959] [2020-10-09 10:45:52,505 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1732761710] [2020-10-09 10:45:52,505 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 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 207 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:52,542 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:45:52,542 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:52,543 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:52,543 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:52,864 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:52,864 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:52,864 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:52,864 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [849258358] [2020-10-09 10:45:52,865 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:52,865 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:52,865 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:52,865 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=62, Invalid=210, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:52,865 INFO L87 Difference]: Start difference. First operand 166 states and 413 transitions. Second operand 17 states. [2020-10-09 10:45:53,861 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:53,862 INFO L93 Difference]: Finished difference Result 253 states and 588 transitions. [2020-10-09 10:45:53,864 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:45:53,864 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:53,864 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:53,865 INFO L225 Difference]: With dead ends: 253 [2020-10-09 10:45:53,865 INFO L226 Difference]: Without dead ends: 251 [2020-10-09 10:45:53,865 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 232 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=274, Invalid=718, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:45:53,865 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 251 states. [2020-10-09 10:45:53,867 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 251 to 165. [2020-10-09 10:45:53,867 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:45:53,868 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-09 10:45:53,868 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-09 10:45:53,868 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:53,868 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-09 10:45:53,868 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:53,868 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-09 10:45:53,868 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:53,868 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:53,869 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:54,069 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 207 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable213 [2020-10-09 10:45:54,070 INFO L429 AbstractCegarLoop]: === Iteration 215 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:54,070 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:54,070 INFO L82 PathProgramCache]: Analyzing trace with hash 2121052950, now seen corresponding path program 181 times [2020-10-09 10:45:54,070 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:54,071 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1894683264] [2020-10-09 10:45:54,071 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:54,074 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:54,253 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1894683264] [2020-10-09 10:45:54,254 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1964591409] [2020-10-09 10:45:54,254 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 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 208 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:54,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:54,292 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:54,292 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:54,609 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:54,610 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:54,610 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:54,610 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1887893281] [2020-10-09 10:45:54,610 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:54,610 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:54,610 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:54,610 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:54,610 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-09 10:45:55,992 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:55,992 INFO L93 Difference]: Finished difference Result 268 states and 622 transitions. [2020-10-09 10:45:55,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:45:55,994 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:55,994 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:56,001 INFO L225 Difference]: With dead ends: 268 [2020-10-09 10:45:56,001 INFO L226 Difference]: Without dead ends: 266 [2020-10-09 10:45:56,002 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 317 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=395, Invalid=937, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:45:56,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-09 10:45:56,003 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 167. [2020-10-09 10:45:56,004 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:45:56,004 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-09 10:45:56,004 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-09 10:45:56,004 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:56,004 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-09 10:45:56,004 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:56,004 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-09 10:45:56,005 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:56,005 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:56,005 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:56,205 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable214,208 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:56,206 INFO L429 AbstractCegarLoop]: === Iteration 216 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:56,206 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:56,206 INFO L82 PathProgramCache]: Analyzing trace with hash 2121053911, now seen corresponding path program 182 times [2020-10-09 10:45:56,206 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:56,207 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [861284658] [2020-10-09 10:45:56,207 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:56,213 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:56,410 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:56,410 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [861284658] [2020-10-09 10:45:56,411 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1268391183] [2020-10-09 10:45:56,411 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 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 209 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:56,449 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:45:56,449 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:56,450 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:56,451 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:56,831 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:56,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:56,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:56,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1040151254] [2020-10-09 10:45:56,832 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:56,832 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:56,833 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:56,833 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:56,833 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-09 10:45:58,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:45:58,272 INFO L93 Difference]: Finished difference Result 271 states and 630 transitions. [2020-10-09 10:45:58,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 28 states. [2020-10-09 10:45:58,274 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:45:58,274 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:45:58,275 INFO L225 Difference]: With dead ends: 271 [2020-10-09 10:45:58,275 INFO L226 Difference]: Without dead ends: 269 [2020-10-09 10:45:58,276 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 315 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:45:58,276 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-09 10:45:58,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-09 10:45:58,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:45:58,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-09 10:45:58,279 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-09 10:45:58,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:45:58,280 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-09 10:45:58,280 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:45:58,280 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-09 10:45:58,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:45:58,280 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:45:58,280 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:45:58,481 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 209 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable215 [2020-10-09 10:45:58,481 INFO L429 AbstractCegarLoop]: === Iteration 217 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:45:58,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:45:58,482 INFO L82 PathProgramCache]: Analyzing trace with hash 2121716040, now seen corresponding path program 183 times [2020-10-09 10:45:58,482 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:45:58,482 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469593335] [2020-10-09 10:45:58,482 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:45:58,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:45:58,692 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:58,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469593335] [2020-10-09 10:45:58,693 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [987948874] [2020-10-09 10:45:58,693 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 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 210 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:45:58,735 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:45:58,735 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:45:58,736 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:45:58,737 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:45:59,127 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:45:59,128 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:45:59,128 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:45:59,128 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954199936] [2020-10-09 10:45:59,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:45:59,129 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:45:59,129 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:45:59,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:45:59,129 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-09 10:46:00,544 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:00,544 INFO L93 Difference]: Finished difference Result 262 states and 620 transitions. [2020-10-09 10:46:00,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:46:00,546 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:00,546 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:00,547 INFO L225 Difference]: With dead ends: 262 [2020-10-09 10:46:00,547 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:46:00,547 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 329 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=408, Invalid=924, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:46:00,548 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:46:00,550 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 171. [2020-10-09 10:46:00,550 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:46:00,551 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-09 10:46:00,551 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-09 10:46:00,551 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:00,551 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-09 10:46:00,551 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:00,551 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-09 10:46:00,551 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:00,551 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:00,551 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:00,752 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 210 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable216 [2020-10-09 10:46:00,752 INFO L429 AbstractCegarLoop]: === Iteration 218 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:00,753 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:00,753 INFO L82 PathProgramCache]: Analyzing trace with hash 2121737399, now seen corresponding path program 184 times [2020-10-09 10:46:00,753 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:00,753 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744332559] [2020-10-09 10:46:00,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:00,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:00,938 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:00,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744332559] [2020-10-09 10:46:00,939 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26301867] [2020-10-09 10:46:00,939 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 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 211 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:00,980 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:46:00,980 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:00,981 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:00,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:01,249 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:46:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:01,272 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:01,272 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:01,272 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [622060923] [2020-10-09 10:46:01,272 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:01,272 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:01,273 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:01,273 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:01,273 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-09 10:46:02,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:02,696 INFO L93 Difference]: Finished difference Result 248 states and 600 transitions. [2020-10-09 10:46:02,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:46:02,698 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:02,698 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:02,698 INFO L225 Difference]: With dead ends: 248 [2020-10-09 10:46:02,699 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:46:02,699 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 346 ImplicationChecksByTransitivity, 1.6s TimeCoverageRelationStatistics Valid=451, Invalid=955, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:46:02,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:46:02,708 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 171. [2020-10-09 10:46:02,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:46:02,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-09 10:46:02,709 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-09 10:46:02,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:02,709 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-09 10:46:02,709 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:02,710 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-09 10:46:02,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:02,710 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:02,710 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:02,910 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable217,211 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:02,911 INFO L429 AbstractCegarLoop]: === Iteration 219 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:02,911 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:02,912 INFO L82 PathProgramCache]: Analyzing trace with hash 2121738360, now seen corresponding path program 185 times [2020-10-09 10:46:02,912 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:02,912 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1770534782] [2020-10-09 10:46:02,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:02,916 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:03,130 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:03,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1770534782] [2020-10-09 10:46:03,130 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [890532139] [2020-10-09 10:46:03,131 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 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 212 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:03,175 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:46:03,175 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:03,176 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:03,176 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:03,544 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:46:03,635 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:03,636 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:03,636 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:03,636 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1875405023] [2020-10-09 10:46:03,637 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:03,637 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:03,637 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:03,637 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:03,637 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-09 10:46:05,700 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:05,700 INFO L93 Difference]: Finished difference Result 287 states and 694 transitions. [2020-10-09 10:46:05,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:46:05,703 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:05,703 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:05,704 INFO L225 Difference]: With dead ends: 287 [2020-10-09 10:46:05,704 INFO L226 Difference]: Without dead ends: 282 [2020-10-09 10:46:05,704 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 424 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=487, Invalid=1153, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:46:05,705 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-09 10:46:05,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 169. [2020-10-09 10:46:05,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:46:05,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 424 transitions. [2020-10-09 10:46:05,708 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 424 transitions. Word has length 14 [2020-10-09 10:46:05,708 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:05,708 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 424 transitions. [2020-10-09 10:46:05,708 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:05,708 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 424 transitions. [2020-10-09 10:46:05,708 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:05,708 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:05,709 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:05,909 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable218,212 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:05,909 INFO L429 AbstractCegarLoop]: === Iteration 220 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:05,910 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:05,910 INFO L82 PathProgramCache]: Analyzing trace with hash 2121745831, now seen corresponding path program 186 times [2020-10-09 10:46:05,910 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:05,910 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123692395] [2020-10-09 10:46:05,911 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:05,915 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:06,136 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:06,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123692395] [2020-10-09 10:46:06,137 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2004486742] [2020-10-09 10:46:06,137 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 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 213 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:06,200 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-09 10:46:06,200 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:06,201 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:06,202 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:06,703 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:06,703 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:06,704 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:06,704 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1757064353] [2020-10-09 10:46:06,704 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:06,705 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:06,705 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:06,705 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:06,706 INFO L87 Difference]: Start difference. First operand 169 states and 424 transitions. Second operand 17 states. [2020-10-09 10:46:08,554 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:08,554 INFO L93 Difference]: Finished difference Result 284 states and 678 transitions. [2020-10-09 10:46:08,555 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:46:08,556 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:08,556 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:08,556 INFO L225 Difference]: With dead ends: 284 [2020-10-09 10:46:08,557 INFO L226 Difference]: Without dead ends: 282 [2020-10-09 10:46:08,557 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 43 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 37 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 392 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=423, Invalid=1059, Unknown=0, NotChecked=0, Total=1482 [2020-10-09 10:46:08,558 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 282 states. [2020-10-09 10:46:08,560 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 282 to 171. [2020-10-09 10:46:08,560 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:46:08,560 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 431 transitions. [2020-10-09 10:46:08,560 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 431 transitions. Word has length 14 [2020-10-09 10:46:08,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:08,561 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 431 transitions. [2020-10-09 10:46:08,561 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:08,561 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 431 transitions. [2020-10-09 10:46:08,561 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:08,561 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:08,561 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:08,762 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable219,213 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:08,762 INFO L429 AbstractCegarLoop]: === Iteration 221 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:08,762 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:08,763 INFO L82 PathProgramCache]: Analyzing trace with hash 2121767190, now seen corresponding path program 187 times [2020-10-09 10:46:08,763 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:08,763 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [508146254] [2020-10-09 10:46:08,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:08,767 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:08,944 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:08,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [508146254] [2020-10-09 10:46:08,945 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1598984656] [2020-10-09 10:46:08,945 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 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 214 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:08,985 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:08,986 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:08,987 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:09,278 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:46:09,367 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:09,367 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:09,367 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:09,367 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016410658] [2020-10-09 10:46:09,367 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:09,368 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:09,368 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:09,368 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:09,368 INFO L87 Difference]: Start difference. First operand 171 states and 431 transitions. Second operand 17 states. [2020-10-09 10:46:11,529 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:11,529 INFO L93 Difference]: Finished difference Result 289 states and 702 transitions. [2020-10-09 10:46:11,532 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 31 states. [2020-10-09 10:46:11,533 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:11,533 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:11,533 INFO L225 Difference]: With dead ends: 289 [2020-10-09 10:46:11,534 INFO L226 Difference]: Without dead ends: 284 [2020-10-09 10:46:11,534 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 396 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=481, Invalid=1079, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:46:11,534 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 284 states. [2020-10-09 10:46:11,536 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 284 to 172. [2020-10-09 10:46:11,537 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 172 states. [2020-10-09 10:46:11,537 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 172 states to 172 states and 436 transitions. [2020-10-09 10:46:11,537 INFO L78 Accepts]: Start accepts. Automaton has 172 states and 436 transitions. Word has length 14 [2020-10-09 10:46:11,537 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:11,537 INFO L481 AbstractCegarLoop]: Abstraction has 172 states and 436 transitions. [2020-10-09 10:46:11,537 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:11,537 INFO L276 IsEmpty]: Start isEmpty. Operand 172 states and 436 transitions. [2020-10-09 10:46:11,538 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:11,538 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:11,538 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:11,738 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable220,214 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:11,739 INFO L429 AbstractCegarLoop]: === Iteration 222 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:11,739 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:11,739 INFO L82 PathProgramCache]: Analyzing trace with hash 2121768151, now seen corresponding path program 188 times [2020-10-09 10:46:11,739 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:11,740 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [161093001] [2020-10-09 10:46:11,740 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:11,744 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:11,967 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:11,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [161093001] [2020-10-09 10:46:11,968 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1950244367] [2020-10-09 10:46:11,968 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 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 215 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:12,007 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:46:12,007 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:12,008 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:12,009 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:12,335 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:46:12,373 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:12,374 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:12,374 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:12,374 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1980059675] [2020-10-09 10:46:12,374 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:12,374 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:12,374 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:12,375 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=79, Invalid=193, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:12,375 INFO L87 Difference]: Start difference. First operand 172 states and 436 transitions. Second operand 17 states. [2020-10-09 10:46:14,598 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:14,598 INFO L93 Difference]: Finished difference Result 312 states and 753 transitions. [2020-10-09 10:46:14,599 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:46:14,600 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:14,600 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:14,600 INFO L225 Difference]: With dead ends: 312 [2020-10-09 10:46:14,600 INFO L226 Difference]: Without dead ends: 304 [2020-10-09 10:46:14,600 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 530 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=543, Invalid=1349, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:46:14,601 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 304 states. [2020-10-09 10:46:14,603 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 304 to 165. [2020-10-09 10:46:14,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:46:14,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 410 transitions. [2020-10-09 10:46:14,604 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 410 transitions. Word has length 14 [2020-10-09 10:46:14,604 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:14,604 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 410 transitions. [2020-10-09 10:46:14,604 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:14,604 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 410 transitions. [2020-10-09 10:46:14,605 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:14,605 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:14,605 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:14,805 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable221,215 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:14,806 INFO L429 AbstractCegarLoop]: === Iteration 223 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:14,806 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:14,806 INFO L82 PathProgramCache]: Analyzing trace with hash 2121976471, now seen corresponding path program 189 times [2020-10-09 10:46:14,806 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:14,807 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [160156140] [2020-10-09 10:46:14,807 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:14,811 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:15,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [160156140] [2020-10-09 10:46:15,010 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2008954390] [2020-10-09 10:46:15,011 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 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 216 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:15,049 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:46:15,049 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:15,050 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:15,050 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:15,396 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:15,397 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:15,397 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:15,397 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [853789665] [2020-10-09 10:46:15,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:15,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:15,398 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:15,398 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=206, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:15,398 INFO L87 Difference]: Start difference. First operand 165 states and 410 transitions. Second operand 17 states. [2020-10-09 10:46:16,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:16,705 INFO L93 Difference]: Finished difference Result 262 states and 617 transitions. [2020-10-09 10:46:16,706 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:46:16,706 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:16,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:16,707 INFO L225 Difference]: With dead ends: 262 [2020-10-09 10:46:16,707 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:46:16,707 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 260 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=314, Invalid=808, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:46:16,708 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:46:16,710 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 167. [2020-10-09 10:46:16,710 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:46:16,710 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-09 10:46:16,711 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-09 10:46:16,711 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:16,711 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-09 10:46:16,711 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:16,711 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-09 10:46:16,711 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:16,711 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:16,712 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:16,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 216 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable222 [2020-10-09 10:46:16,921 INFO L429 AbstractCegarLoop]: === Iteration 224 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:16,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:16,922 INFO L82 PathProgramCache]: Analyzing trace with hash 2122639561, now seen corresponding path program 190 times [2020-10-09 10:46:16,922 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:16,922 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1151239276] [2020-10-09 10:46:16,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:16,925 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:17,139 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:17,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1151239276] [2020-10-09 10:46:17,139 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8313468] [2020-10-09 10:46:17,140 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 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 217 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:17,183 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:46:17,183 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:17,184 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:17,184 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:17,561 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:17,561 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:17,562 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:17,562 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1726923648] [2020-10-09 10:46:17,562 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:17,563 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:17,563 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:17,563 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:17,563 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-09 10:46:19,171 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:19,171 INFO L93 Difference]: Finished difference Result 271 states and 650 transitions. [2020-10-09 10:46:19,174 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:46:19,174 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:19,175 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:19,175 INFO L225 Difference]: With dead ends: 271 [2020-10-09 10:46:19,175 INFO L226 Difference]: Without dead ends: 269 [2020-10-09 10:46:19,176 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 344 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=396, Invalid=936, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:46:19,176 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 269 states. [2020-10-09 10:46:19,178 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 269 to 169. [2020-10-09 10:46:19,178 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:46:19,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-09 10:46:19,179 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-09 10:46:19,179 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:19,179 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-09 10:46:19,179 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:19,179 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-09 10:46:19,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:19,179 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:19,179 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:19,380 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 217 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable223 [2020-10-09 10:46:19,380 INFO L429 AbstractCegarLoop]: === Iteration 225 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:19,381 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:19,381 INFO L82 PathProgramCache]: Analyzing trace with hash 2122660920, now seen corresponding path program 191 times [2020-10-09 10:46:19,381 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:19,381 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [64607954] [2020-10-09 10:46:19,382 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:19,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:19,590 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:19,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [64607954] [2020-10-09 10:46:19,590 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [464140284] [2020-10-09 10:46:19,591 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 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 218 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:19,636 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:46:19,637 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:19,638 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:19,639 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:19,938 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:46:19,963 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:19,964 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:19,964 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:19,964 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320046925] [2020-10-09 10:46:19,965 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:19,965 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:19,965 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:19,965 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=82, Invalid=190, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:19,965 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-09 10:46:21,879 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:21,879 INFO L93 Difference]: Finished difference Result 296 states and 714 transitions. [2020-10-09 10:46:21,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:46:21,881 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:21,882 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:21,882 INFO L225 Difference]: With dead ends: 296 [2020-10-09 10:46:21,883 INFO L226 Difference]: Without dead ends: 288 [2020-10-09 10:46:21,883 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 48 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 42 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 538 ImplicationChecksByTransitivity, 2.0s TimeCoverageRelationStatistics Valid=559, Invalid=1333, Unknown=0, NotChecked=0, Total=1892 [2020-10-09 10:46:21,883 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 288 states. [2020-10-09 10:46:21,885 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 288 to 171. [2020-10-09 10:46:21,886 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:46:21,886 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-09 10:46:21,886 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-09 10:46:21,886 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:21,886 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-09 10:46:21,886 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:21,886 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-09 10:46:21,887 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:21,887 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:21,887 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:22,087 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 218 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable224 [2020-10-09 10:46:22,088 INFO L429 AbstractCegarLoop]: === Iteration 226 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:22,088 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:22,088 INFO L82 PathProgramCache]: Analyzing trace with hash 2122661881, now seen corresponding path program 192 times [2020-10-09 10:46:22,088 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:22,089 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [331825165] [2020-10-09 10:46:22,089 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:22,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:22,319 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [331825165] [2020-10-09 10:46:22,320 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1532422451] [2020-10-09 10:46:22,320 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 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 219 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:22,361 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:46:22,361 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:22,362 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:22,362 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:22,664 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:46:22,689 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:22,690 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:22,690 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:22,690 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740422743] [2020-10-09 10:46:22,690 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:22,691 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:22,691 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:22,691 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=189, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:22,691 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. [2020-10-09 10:46:24,323 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:24,324 INFO L93 Difference]: Finished difference Result 298 states and 732 transitions. [2020-10-09 10:46:24,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:46:24,326 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:24,326 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:24,327 INFO L225 Difference]: With dead ends: 298 [2020-10-09 10:46:24,327 INFO L226 Difference]: Without dead ends: 290 [2020-10-09 10:46:24,327 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 429 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=483, Invalid=1157, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:46:24,328 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 290 states. [2020-10-09 10:46:24,330 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 290 to 169. [2020-10-09 10:46:24,330 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:46:24,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 429 transitions. [2020-10-09 10:46:24,331 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 429 transitions. Word has length 14 [2020-10-09 10:46:24,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:24,331 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 429 transitions. [2020-10-09 10:46:24,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:24,331 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 429 transitions. [2020-10-09 10:46:24,331 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:24,331 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:24,331 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:24,532 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 219 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable225 [2020-10-09 10:46:24,532 INFO L429 AbstractCegarLoop]: === Iteration 227 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:24,532 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:24,533 INFO L82 PathProgramCache]: Analyzing trace with hash 2122690711, now seen corresponding path program 193 times [2020-10-09 10:46:24,533 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:24,533 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [188775557] [2020-10-09 10:46:24,533 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:24,537 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:24,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:24,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [188775557] [2020-10-09 10:46:24,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1311692164] [2020-10-09 10:46:24,742 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 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 220 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:24,787 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:24,788 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:24,789 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:25,140 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:46:25,172 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:25,172 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:25,173 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:25,173 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2034679031] [2020-10-09 10:46:25,173 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:25,173 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:25,173 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:25,173 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=81, Invalid=191, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:25,173 INFO L87 Difference]: Start difference. First operand 169 states and 429 transitions. Second operand 17 states. [2020-10-09 10:46:27,456 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:27,456 INFO L93 Difference]: Finished difference Result 291 states and 709 transitions. [2020-10-09 10:46:27,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:46:27,459 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:27,460 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:27,460 INFO L225 Difference]: With dead ends: 291 [2020-10-09 10:46:27,460 INFO L226 Difference]: Without dead ends: 283 [2020-10-09 10:46:27,461 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 45 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 39 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 444 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=480, Invalid=1160, Unknown=0, NotChecked=0, Total=1640 [2020-10-09 10:46:27,461 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 283 states. [2020-10-09 10:46:27,463 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 283 to 167. [2020-10-09 10:46:27,463 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:46:27,464 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-09 10:46:27,464 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-09 10:46:27,464 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:27,464 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-09 10:46:27,464 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:27,464 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-09 10:46:27,464 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:27,465 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:27,465 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:27,665 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 220 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable226 [2020-10-09 10:46:27,666 INFO L429 AbstractCegarLoop]: === Iteration 228 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:27,666 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:27,666 INFO L82 PathProgramCache]: Analyzing trace with hash -2145285195, now seen corresponding path program 194 times [2020-10-09 10:46:27,666 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:27,667 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1026927051] [2020-10-09 10:46:27,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:27,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:27,888 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:27,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1026927051] [2020-10-09 10:46:27,889 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1080379891] [2020-10-09 10:46:27,889 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 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 221 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:27,929 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:46:27,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:27,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:27,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:28,403 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:28,403 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:28,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:28,404 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1936635898] [2020-10-09 10:46:28,404 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:28,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:28,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:28,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:28,404 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-09 10:46:30,285 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:30,285 INFO L93 Difference]: Finished difference Result 265 states and 622 transitions. [2020-10-09 10:46:30,288 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:46:30,288 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:30,288 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:30,289 INFO L225 Difference]: With dead ends: 265 [2020-10-09 10:46:30,289 INFO L226 Difference]: Without dead ends: 263 [2020-10-09 10:46:30,290 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 321 ImplicationChecksByTransitivity, 2.1s TimeCoverageRelationStatistics Valid=361, Invalid=899, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:46:30,290 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 263 states. [2020-10-09 10:46:30,292 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 263 to 167. [2020-10-09 10:46:30,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:46:30,293 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-09 10:46:30,293 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-09 10:46:30,293 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:30,293 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-09 10:46:30,293 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:30,293 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-09 10:46:30,293 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:30,293 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:30,293 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:30,494 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable227,221 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:30,494 INFO L429 AbstractCegarLoop]: === Iteration 229 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:30,495 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:30,495 INFO L82 PathProgramCache]: Analyzing trace with hash -2144622105, now seen corresponding path program 195 times [2020-10-09 10:46:30,495 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:30,495 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [332589756] [2020-10-09 10:46:30,496 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:30,499 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:30,730 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:30,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [332589756] [2020-10-09 10:46:30,730 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [392087823] [2020-10-09 10:46:30,731 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 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 222 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:30,778 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:46:30,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:30,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:30,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:31,242 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:31,242 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:31,242 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:31,242 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1658014827] [2020-10-09 10:46:31,242 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:31,242 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:31,243 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:31,243 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:31,243 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 17 states. [2020-10-09 10:46:33,452 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:33,453 INFO L93 Difference]: Finished difference Result 262 states and 627 transitions. [2020-10-09 10:46:33,455 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 30 states. [2020-10-09 10:46:33,456 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:33,456 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:33,457 INFO L225 Difference]: With dead ends: 262 [2020-10-09 10:46:33,457 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:46:33,457 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 423 ImplicationChecksByTransitivity, 2.4s TimeCoverageRelationStatistics Valid=448, Invalid=1112, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:46:33,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:46:33,460 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 169. [2020-10-09 10:46:33,460 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:46:33,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-09 10:46:33,461 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-09 10:46:33,461 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:33,461 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-09 10:46:33,461 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:33,461 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-09 10:46:33,461 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:33,461 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:33,461 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:33,662 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 222 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable228 [2020-10-09 10:46:33,662 INFO L429 AbstractCegarLoop]: === Iteration 230 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:33,663 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:33,663 INFO L82 PathProgramCache]: Analyzing trace with hash -2144599785, now seen corresponding path program 196 times [2020-10-09 10:46:33,663 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:33,663 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [621016844] [2020-10-09 10:46:33,664 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:33,668 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:33,896 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:33,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [621016844] [2020-10-09 10:46:33,897 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459995826] [2020-10-09 10:46:33,897 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 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 223 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:33,940 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:46:33,941 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:33,942 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:33,942 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:34,346 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:46:34,417 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:34,418 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:34,418 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:46:34,418 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1313924811] [2020-10-09 10:46:34,418 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:46:34,418 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:34,419 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:46:34,419 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:46:34,419 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-09 10:46:37,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:46:37,725 INFO L93 Difference]: Finished difference Result 285 states and 688 transitions. [2020-10-09 10:46:37,729 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:46:37,729 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:46:37,729 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:46:37,730 INFO L225 Difference]: With dead ends: 285 [2020-10-09 10:46:37,730 INFO L226 Difference]: Without dead ends: 280 [2020-10-09 10:46:37,731 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 49 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 562 ImplicationChecksByTransitivity, 3.3s TimeCoverageRelationStatistics Valid=587, Invalid=1393, Unknown=0, NotChecked=0, Total=1980 [2020-10-09 10:46:37,731 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-09 10:46:37,733 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 167. [2020-10-09 10:46:37,733 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:46:37,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 419 transitions. [2020-10-09 10:46:37,734 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 419 transitions. Word has length 14 [2020-10-09 10:46:37,734 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:46:37,734 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 419 transitions. [2020-10-09 10:46:37,734 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:46:37,734 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 419 transitions. [2020-10-09 10:46:37,739 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:46:37,739 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:46:37,739 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:46:37,940 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable229,223 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:37,940 INFO L429 AbstractCegarLoop]: === Iteration 231 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:46:37,941 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:46:37,941 INFO L82 PathProgramCache]: Analyzing trace with hash -2144570955, now seen corresponding path program 197 times [2020-10-09 10:46:37,941 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:46:37,941 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1789912630] [2020-10-09 10:46:37,941 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:46:37,945 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:46:38,200 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:38,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1789912630] [2020-10-09 10:46:38,201 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [347558606] [2020-10-09 10:46:38,201 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 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 224 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:46:38,241 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:46:38,241 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:46:38,242 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:46:38,243 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:46:42,856 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:46:44,988 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:46:44,988 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:46:44,988 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2020-10-09 10:46:44,988 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1358579798] [2020-10-09 10:46:44,989 INFO L461 AbstractCegarLoop]: Interpolant automaton has 18 states [2020-10-09 10:46:44,989 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:46:44,989 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2020-10-09 10:46:44,989 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=83, Invalid=220, Unknown=3, NotChecked=0, Total=306 [2020-10-09 10:46:44,990 INFO L87 Difference]: Start difference. First operand 167 states and 419 transitions. Second operand 18 states. [2020-10-09 10:46:49,260 WARN L193 SmtUtils]: Spent 4.14 s on a formula simplification. DAG size of input: 54 DAG size of output: 38 [2020-10-09 10:46:49,869 WARN L193 SmtUtils]: Spent 118.00 ms on a formula simplification. DAG size of input: 43 DAG size of output: 16 [2020-10-09 10:46:54,223 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-09 10:46:54,700 WARN L193 SmtUtils]: Spent 341.00 ms on a formula simplification. DAG size of input: 59 DAG size of output: 23 [2020-10-09 10:46:57,478 WARN L193 SmtUtils]: Spent 257.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 22 [2020-10-09 10:46:59,769 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-09 10:47:25,588 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-09 10:47:32,199 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 24 DAG size of output: 22 [2020-10-09 10:48:21,666 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:21,666 INFO L93 Difference]: Finished difference Result 302 states and 718 transitions. [2020-10-09 10:48:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:48:21,674 INFO L78 Accepts]: Start accepts. Automaton has 18 states. Word has length 14 [2020-10-09 10:48:21,674 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:21,675 INFO L225 Difference]: With dead ends: 302 [2020-10-09 10:48:21,675 INFO L226 Difference]: Without dead ends: 297 [2020-10-09 10:48:21,675 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 51 GetRequests, 5 SyntacticMatches, 3 SemanticMatches, 43 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 614 ImplicationChecksByTransitivity, 61.8s TimeCoverageRelationStatistics Valid=556, Invalid=1408, Unknown=16, NotChecked=0, Total=1980 [2020-10-09 10:48:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 297 states. [2020-10-09 10:48:21,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 297 to 166. [2020-10-09 10:48:21,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:48:21,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 414 transitions. [2020-10-09 10:48:21,678 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 414 transitions. Word has length 14 [2020-10-09 10:48:21,678 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:21,678 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 414 transitions. [2020-10-09 10:48:21,678 INFO L482 AbstractCegarLoop]: Interpolant automaton has 18 states. [2020-10-09 10:48:21,679 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 414 transitions. [2020-10-09 10:48:21,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:21,679 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:21,679 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:21,880 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable230,224 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:21,880 INFO L429 AbstractCegarLoop]: === Iteration 232 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:21,881 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:21,881 INFO L82 PathProgramCache]: Analyzing trace with hash -2143668793, now seen corresponding path program 198 times [2020-10-09 10:48:21,881 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:21,881 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646334551] [2020-10-09 10:48:21,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:21,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:22,103 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:22,103 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646334551] [2020-10-09 10:48:22,104 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [305107538] [2020-10-09 10:48:22,104 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 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 225 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:22,145 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:48:22,146 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:22,147 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:22,147 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:22,529 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:22,529 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:22,529 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:22,529 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925777491] [2020-10-09 10:48:22,530 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:22,530 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:22,530 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:22,530 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:22,531 INFO L87 Difference]: Start difference. First operand 166 states and 414 transitions. Second operand 17 states. [2020-10-09 10:48:23,344 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:23,345 INFO L93 Difference]: Finished difference Result 219 states and 516 transitions. [2020-10-09 10:48:23,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:48:23,348 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:23,348 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:23,349 INFO L225 Difference]: With dead ends: 219 [2020-10-09 10:48:23,349 INFO L226 Difference]: Without dead ends: 217 [2020-10-09 10:48:23,350 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=214, Invalid=488, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:48:23,350 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 217 states. [2020-10-09 10:48:23,353 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 217 to 167. [2020-10-09 10:48:23,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:48:23,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 416 transitions. [2020-10-09 10:48:23,353 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 416 transitions. Word has length 14 [2020-10-09 10:48:23,354 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:23,354 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 416 transitions. [2020-10-09 10:48:23,354 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:23,354 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 416 transitions. [2020-10-09 10:48:23,354 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:23,354 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:23,354 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:23,555 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable231,225 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:23,555 INFO L429 AbstractCegarLoop]: === Iteration 233 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:23,555 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:23,556 INFO L82 PathProgramCache]: Analyzing trace with hash -2143646473, now seen corresponding path program 199 times [2020-10-09 10:48:23,556 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:23,556 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1442330836] [2020-10-09 10:48:23,556 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:23,561 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:23,813 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:23,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1442330836] [2020-10-09 10:48:23,814 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1283293960] [2020-10-09 10:48:23,814 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 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 226 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:23,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:23,854 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:23,854 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:24,139 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:48:24,160 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:24,160 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:24,160 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:24,161 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1377041434] [2020-10-09 10:48:24,161 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:24,161 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:24,162 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:24,162 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:24,162 INFO L87 Difference]: Start difference. First operand 167 states and 416 transitions. Second operand 17 states. [2020-10-09 10:48:25,126 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:25,126 INFO L93 Difference]: Finished difference Result 229 states and 538 transitions. [2020-10-09 10:48:25,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:48:25,130 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:25,130 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:25,131 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:48:25,131 INFO L226 Difference]: Without dead ends: 224 [2020-10-09 10:48:25,132 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.2s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:48:25,132 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 224 states. [2020-10-09 10:48:25,135 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 224 to 158. [2020-10-09 10:48:25,136 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 158 states. [2020-10-09 10:48:25,136 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 158 states to 158 states and 386 transitions. [2020-10-09 10:48:25,136 INFO L78 Accepts]: Start accepts. Automaton has 158 states and 386 transitions. Word has length 14 [2020-10-09 10:48:25,136 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:25,136 INFO L481 AbstractCegarLoop]: Abstraction has 158 states and 386 transitions. [2020-10-09 10:48:25,136 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:25,137 INFO L276 IsEmpty]: Start isEmpty. Operand 158 states and 386 transitions. [2020-10-09 10:48:25,137 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:25,137 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:25,137 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:25,337 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 226 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable232 [2020-10-09 10:48:25,338 INFO L429 AbstractCegarLoop]: === Iteration 234 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:25,338 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:25,338 INFO L82 PathProgramCache]: Analyzing trace with hash -255670682, now seen corresponding path program 200 times [2020-10-09 10:48:25,339 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:25,339 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1782370098] [2020-10-09 10:48:25,339 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:25,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:25,602 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:25,602 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1782370098] [2020-10-09 10:48:25,603 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [676089046] [2020-10-09 10:48:25,603 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 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 227 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:25,649 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:48:25,649 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:25,651 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:25,652 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:26,057 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:26,058 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:26,058 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:26,058 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [907761150] [2020-10-09 10:48:26,059 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:26,059 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:26,059 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:26,059 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:26,059 INFO L87 Difference]: Start difference. First operand 158 states and 386 transitions. Second operand 17 states. [2020-10-09 10:48:26,695 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:26,695 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-09 10:48:26,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:48:26,699 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:26,699 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:26,700 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:48:26,700 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:48:26,700 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 148 ImplicationChecksByTransitivity, 1.0s TimeCoverageRelationStatistics Valid=179, Invalid=421, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:48:26,700 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:48:26,702 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 161. [2020-10-09 10:48:26,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 161 states. [2020-10-09 10:48:26,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 161 states to 161 states and 395 transitions. [2020-10-09 10:48:26,703 INFO L78 Accepts]: Start accepts. Automaton has 161 states and 395 transitions. Word has length 14 [2020-10-09 10:48:26,704 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:26,704 INFO L481 AbstractCegarLoop]: Abstraction has 161 states and 395 transitions. [2020-10-09 10:48:26,704 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:26,704 INFO L276 IsEmpty]: Start isEmpty. Operand 161 states and 395 transitions. [2020-10-09 10:48:26,704 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:26,704 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:26,704 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:26,905 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 227 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable233 [2020-10-09 10:48:26,905 INFO L429 AbstractCegarLoop]: === Iteration 235 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:26,906 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:26,906 INFO L82 PathProgramCache]: Analyzing trace with hash -255669721, now seen corresponding path program 201 times [2020-10-09 10:48:26,906 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:26,906 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1935865928] [2020-10-09 10:48:26,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:26,910 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:27,192 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:27,192 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1935865928] [2020-10-09 10:48:27,193 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2042380857] [2020-10-09 10:48:27,193 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 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 228 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:27,233 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:48:27,233 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:27,234 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:27,235 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:27,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:27,674 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:27,674 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:27,675 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [576425773] [2020-10-09 10:48:27,675 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:27,675 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:27,675 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:27,675 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:27,675 INFO L87 Difference]: Start difference. First operand 161 states and 395 transitions. Second operand 17 states. [2020-10-09 10:48:28,558 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:28,558 INFO L93 Difference]: Finished difference Result 237 states and 545 transitions. [2020-10-09 10:48:28,560 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:48:28,560 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:28,560 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:28,560 INFO L225 Difference]: With dead ends: 237 [2020-10-09 10:48:28,560 INFO L226 Difference]: Without dead ends: 235 [2020-10-09 10:48:28,561 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=195, Invalid=455, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:48:28,561 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 235 states. [2020-10-09 10:48:28,563 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 235 to 160. [2020-10-09 10:48:28,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:48:28,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 392 transitions. [2020-10-09 10:48:28,564 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 392 transitions. Word has length 14 [2020-10-09 10:48:28,564 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:28,564 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 392 transitions. [2020-10-09 10:48:28,564 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:28,564 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 392 transitions. [2020-10-09 10:48:28,564 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:28,564 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:28,565 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:28,766 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 228 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable234 [2020-10-09 10:48:28,767 INFO L429 AbstractCegarLoop]: === Iteration 236 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:28,767 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:28,767 INFO L82 PathProgramCache]: Analyzing trace with hash -255640891, now seen corresponding path program 202 times [2020-10-09 10:48:28,768 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:28,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1697119062] [2020-10-09 10:48:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:28,773 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:29,041 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:29,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1697119062] [2020-10-09 10:48:29,041 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1952771979] [2020-10-09 10:48:29,042 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 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 229 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:29,082 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:48:29,082 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:29,083 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:29,084 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:31,719 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:31,719 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:31,719 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:31,719 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1634991267] [2020-10-09 10:48:31,720 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:31,720 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:31,720 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:31,720 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:31,720 INFO L87 Difference]: Start difference. First operand 160 states and 392 transitions. Second operand 17 states. [2020-10-09 10:48:32,983 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:32,984 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-09 10:48:32,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2020-10-09 10:48:32,987 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:32,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:32,988 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:48:32,988 INFO L226 Difference]: Without dead ends: 244 [2020-10-09 10:48:32,988 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 207 ImplicationChecksByTransitivity, 3.7s TimeCoverageRelationStatistics Valid=254, Invalid=558, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:48:32,989 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-09 10:48:32,991 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 164. [2020-10-09 10:48:32,991 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:48:32,992 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 403 transitions. [2020-10-09 10:48:32,992 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 403 transitions. Word has length 14 [2020-10-09 10:48:32,992 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:32,992 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 403 transitions. [2020-10-09 10:48:32,992 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:32,992 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 403 transitions. [2020-10-09 10:48:32,993 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:32,993 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:32,993 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:33,199 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 229 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable235 [2020-10-09 10:48:33,199 INFO L429 AbstractCegarLoop]: === Iteration 237 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:33,200 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:33,200 INFO L82 PathProgramCache]: Analyzing trace with hash -254746200, now seen corresponding path program 203 times [2020-10-09 10:48:33,200 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:33,201 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [836850466] [2020-10-09 10:48:33,201 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:33,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:33,467 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:33,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [836850466] [2020-10-09 10:48:33,467 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1199196705] [2020-10-09 10:48:33,468 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 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 230 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:33,514 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:48:33,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:33,516 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:33,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:33,949 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:33,950 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:33,950 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:33,950 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [926845395] [2020-10-09 10:48:33,950 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:33,950 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:33,950 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:33,950 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:33,951 INFO L87 Difference]: Start difference. First operand 164 states and 403 transitions. Second operand 17 states. [2020-10-09 10:48:34,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:34,950 INFO L93 Difference]: Finished difference Result 245 states and 560 transitions. [2020-10-09 10:48:34,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2020-10-09 10:48:34,954 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:34,954 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:34,954 INFO L225 Difference]: With dead ends: 245 [2020-10-09 10:48:34,955 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:48:34,955 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 173 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=222, Invalid=480, Unknown=0, NotChecked=0, Total=702 [2020-10-09 10:48:34,956 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:48:34,958 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 163. [2020-10-09 10:48:34,958 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:48:34,958 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 399 transitions. [2020-10-09 10:48:34,959 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 399 transitions. Word has length 14 [2020-10-09 10:48:34,959 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:34,959 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 399 transitions. [2020-10-09 10:48:34,959 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:34,959 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 399 transitions. [2020-10-09 10:48:34,959 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:34,959 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:34,959 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:35,160 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 230 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable236 [2020-10-09 10:48:35,160 INFO L429 AbstractCegarLoop]: === Iteration 238 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:35,161 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:35,161 INFO L82 PathProgramCache]: Analyzing trace with hash -227041531, now seen corresponding path program 204 times [2020-10-09 10:48:35,161 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:35,161 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1810855074] [2020-10-09 10:48:35,162 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:35,166 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:35,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:35,469 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1810855074] [2020-10-09 10:48:35,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238197231] [2020-10-09 10:48:35,470 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 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 231 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:35,523 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:48:35,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:35,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:35,525 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:35,993 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:35,994 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:35,994 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:35,994 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1907695283] [2020-10-09 10:48:35,994 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:35,994 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:35,994 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:35,994 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=205, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:35,995 INFO L87 Difference]: Start difference. First operand 163 states and 399 transitions. Second operand 17 states. [2020-10-09 10:48:36,853 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:36,854 INFO L93 Difference]: Finished difference Result 239 states and 549 transitions. [2020-10-09 10:48:36,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:48:36,857 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:36,857 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:36,858 INFO L225 Difference]: With dead ends: 239 [2020-10-09 10:48:36,858 INFO L226 Difference]: Without dead ends: 237 [2020-10-09 10:48:36,858 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 149 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=186, Invalid=414, Unknown=0, NotChecked=0, Total=600 [2020-10-09 10:48:36,859 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 237 states. [2020-10-09 10:48:36,861 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 237 to 162. [2020-10-09 10:48:36,861 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:48:36,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 396 transitions. [2020-10-09 10:48:36,862 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 396 transitions. Word has length 14 [2020-10-09 10:48:36,862 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:36,862 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 396 transitions. [2020-10-09 10:48:36,862 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:36,862 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 396 transitions. [2020-10-09 10:48:36,862 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:36,862 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:36,863 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:37,063 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 231 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable237 [2020-10-09 10:48:37,063 INFO L429 AbstractCegarLoop]: === Iteration 239 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:37,064 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:37,064 INFO L82 PathProgramCache]: Analyzing trace with hash -226088219, now seen corresponding path program 205 times [2020-10-09 10:48:37,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:37,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1907094942] [2020-10-09 10:48:37,065 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:37,068 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:37,406 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:37,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1907094942] [2020-10-09 10:48:37,406 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2086748112] [2020-10-09 10:48:37,407 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 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 232 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:37,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:37,448 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:37,448 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:37,861 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:37,861 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:37,861 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:37,862 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1457253836] [2020-10-09 10:48:37,862 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:37,862 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:37,863 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:37,863 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=200, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:37,863 INFO L87 Difference]: Start difference. First operand 162 states and 396 transitions. Second operand 17 states. [2020-10-09 10:48:38,505 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:38,506 INFO L93 Difference]: Finished difference Result 220 states and 508 transitions. [2020-10-09 10:48:38,509 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-09 10:48:38,510 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:38,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:38,510 INFO L225 Difference]: With dead ends: 220 [2020-10-09 10:48:38,511 INFO L226 Difference]: Without dead ends: 218 [2020-10-09 10:48:38,511 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 27 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 1.1s TimeCoverageRelationStatistics Valid=159, Invalid=347, Unknown=0, NotChecked=0, Total=506 [2020-10-09 10:48:38,511 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-09 10:48:38,513 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 156. [2020-10-09 10:48:38,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 156 states. [2020-10-09 10:48:38,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 156 states to 156 states and 381 transitions. [2020-10-09 10:48:38,513 INFO L78 Accepts]: Start accepts. Automaton has 156 states and 381 transitions. Word has length 14 [2020-10-09 10:48:38,514 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:38,514 INFO L481 AbstractCegarLoop]: Abstraction has 156 states and 381 transitions. [2020-10-09 10:48:38,514 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:38,514 INFO L276 IsEmpty]: Start isEmpty. Operand 156 states and 381 transitions. [2020-10-09 10:48:38,514 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:38,514 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:38,514 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:38,715 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 232 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable238 [2020-10-09 10:48:38,715 INFO L429 AbstractCegarLoop]: === Iteration 240 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:38,716 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:38,717 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392972, now seen corresponding path program 206 times [2020-10-09 10:48:38,717 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:38,718 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1118145185] [2020-10-09 10:48:38,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:38,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:38,982 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:38,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1118145185] [2020-10-09 10:48:38,982 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1323086751] [2020-10-09 10:48:38,983 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 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 233 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:39,025 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:48:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:39,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:39,027 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:39,538 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:39,538 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:39,539 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:39,539 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2122920379] [2020-10-09 10:48:39,539 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:39,539 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:39,539 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:39,539 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:39,539 INFO L87 Difference]: Start difference. First operand 156 states and 381 transitions. Second operand 17 states. [2020-10-09 10:48:40,453 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:40,453 INFO L93 Difference]: Finished difference Result 229 states and 528 transitions. [2020-10-09 10:48:40,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:48:40,457 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:40,457 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:40,458 INFO L225 Difference]: With dead ends: 229 [2020-10-09 10:48:40,458 INFO L226 Difference]: Without dead ends: 227 [2020-10-09 10:48:40,458 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 140 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=178, Invalid=472, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:48:40,458 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 227 states. [2020-10-09 10:48:40,461 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 227 to 160. [2020-10-09 10:48:40,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 160 states. [2020-10-09 10:48:40,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 160 states to 160 states and 395 transitions. [2020-10-09 10:48:40,462 INFO L78 Accepts]: Start accepts. Automaton has 160 states and 395 transitions. Word has length 14 [2020-10-09 10:48:40,462 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:40,462 INFO L481 AbstractCegarLoop]: Abstraction has 160 states and 395 transitions. [2020-10-09 10:48:40,462 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:40,462 INFO L276 IsEmpty]: Start isEmpty. Operand 160 states and 395 transitions. [2020-10-09 10:48:40,463 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:40,463 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:40,463 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:40,663 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 233 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable239 [2020-10-09 10:48:40,664 INFO L429 AbstractCegarLoop]: === Iteration 241 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:40,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:40,664 INFO L82 PathProgramCache]: Analyzing trace with hash -1976392011, now seen corresponding path program 207 times [2020-10-09 10:48:40,664 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:40,665 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [739189208] [2020-10-09 10:48:40,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:40,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:40,929 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:40,929 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [739189208] [2020-10-09 10:48:40,930 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426462963] [2020-10-09 10:48:40,930 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 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 234 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:40,974 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:48:40,974 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:40,975 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:40,975 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:41,511 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:41,511 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:41,511 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:41,511 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689570654] [2020-10-09 10:48:41,512 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:41,512 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:41,512 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:41,512 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=215, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:41,512 INFO L87 Difference]: Start difference. First operand 160 states and 395 transitions. Second operand 17 states. [2020-10-09 10:48:42,508 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:42,509 INFO L93 Difference]: Finished difference Result 233 states and 536 transitions. [2020-10-09 10:48:42,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-09 10:48:42,512 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:42,512 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:42,513 INFO L225 Difference]: With dead ends: 233 [2020-10-09 10:48:42,513 INFO L226 Difference]: Without dead ends: 231 [2020-10-09 10:48:42,513 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=174, Invalid=476, Unknown=0, NotChecked=0, Total=650 [2020-10-09 10:48:42,514 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 231 states. [2020-10-09 10:48:42,516 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 231 to 159. [2020-10-09 10:48:42,516 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 159 states. [2020-10-09 10:48:42,517 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 159 states to 159 states and 392 transitions. [2020-10-09 10:48:42,517 INFO L78 Accepts]: Start accepts. Automaton has 159 states and 392 transitions. Word has length 14 [2020-10-09 10:48:42,517 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:42,517 INFO L481 AbstractCegarLoop]: Abstraction has 159 states and 392 transitions. [2020-10-09 10:48:42,517 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:42,517 INFO L276 IsEmpty]: Start isEmpty. Operand 159 states and 392 transitions. [2020-10-09 10:48:42,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:42,517 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:42,518 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:42,718 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable240,234 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:42,718 INFO L429 AbstractCegarLoop]: === Iteration 242 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:42,719 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:42,719 INFO L82 PathProgramCache]: Analyzing trace with hash -1976363181, now seen corresponding path program 208 times [2020-10-09 10:48:42,719 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:42,719 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1319986263] [2020-10-09 10:48:42,720 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:42,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:42,959 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:42,959 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1319986263] [2020-10-09 10:48:42,960 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [18738609] [2020-10-09 10:48:42,960 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 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 235 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:43,005 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:48:43,006 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:43,007 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:43,007 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:46,190 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:46,191 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:46,191 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:46,191 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872813270] [2020-10-09 10:48:46,191 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:46,191 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:46,192 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:46,192 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:46,192 INFO L87 Difference]: Start difference. First operand 159 states and 392 transitions. Second operand 17 states. [2020-10-09 10:48:47,819 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:47,819 INFO L93 Difference]: Finished difference Result 256 states and 582 transitions. [2020-10-09 10:48:47,823 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:48:47,824 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:47,824 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:47,825 INFO L225 Difference]: With dead ends: 256 [2020-10-09 10:48:47,825 INFO L226 Difference]: Without dead ends: 254 [2020-10-09 10:48:47,825 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 236 ImplicationChecksByTransitivity, 4.5s TimeCoverageRelationStatistics Valid=259, Invalid=671, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:48:47,826 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 254 states. [2020-10-09 10:48:47,828 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 254 to 163. [2020-10-09 10:48:47,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 163 states. [2020-10-09 10:48:47,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 163 states to 163 states and 403 transitions. [2020-10-09 10:48:47,828 INFO L78 Accepts]: Start accepts. Automaton has 163 states and 403 transitions. Word has length 14 [2020-10-09 10:48:47,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:47,829 INFO L481 AbstractCegarLoop]: Abstraction has 163 states and 403 transitions. [2020-10-09 10:48:47,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:47,829 INFO L276 IsEmpty]: Start isEmpty. Operand 163 states and 403 transitions. [2020-10-09 10:48:47,829 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:47,829 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:47,829 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:48,030 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable241,235 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:48,030 INFO L429 AbstractCegarLoop]: === Iteration 243 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:48,031 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:48,031 INFO L82 PathProgramCache]: Analyzing trace with hash -1975468490, now seen corresponding path program 209 times [2020-10-09 10:48:48,031 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:48,031 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1413008732] [2020-10-09 10:48:48,032 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:48,036 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:48,294 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:48,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1413008732] [2020-10-09 10:48:48,295 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2032236728] [2020-10-09 10:48:48,295 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 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 236 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:48,346 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:48:48,346 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:48,347 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:48,348 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:48,818 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:48,819 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:48,819 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:48,819 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1974197461] [2020-10-09 10:48:48,820 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:48,820 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:48,820 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:48,821 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:48,821 INFO L87 Difference]: Start difference. First operand 163 states and 403 transitions. Second operand 17 states. [2020-10-09 10:48:50,047 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:50,047 INFO L93 Difference]: Finished difference Result 246 states and 562 transitions. [2020-10-09 10:48:50,051 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:48:50,052 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:50,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:50,052 INFO L225 Difference]: With dead ends: 246 [2020-10-09 10:48:50,052 INFO L226 Difference]: Without dead ends: 244 [2020-10-09 10:48:50,053 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 6 SyntacticMatches, 0 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 182 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:48:50,053 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 244 states. [2020-10-09 10:48:50,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 244 to 162. [2020-10-09 10:48:50,056 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 162 states. [2020-10-09 10:48:50,056 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 162 states to 162 states and 399 transitions. [2020-10-09 10:48:50,057 INFO L78 Accepts]: Start accepts. Automaton has 162 states and 399 transitions. Word has length 14 [2020-10-09 10:48:50,057 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:50,057 INFO L481 AbstractCegarLoop]: Abstraction has 162 states and 399 transitions. [2020-10-09 10:48:50,057 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:50,057 INFO L276 IsEmpty]: Start isEmpty. Operand 162 states and 399 transitions. [2020-10-09 10:48:50,057 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:50,057 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:50,057 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:50,258 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable242,236 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:50,258 INFO L429 AbstractCegarLoop]: === Iteration 244 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:50,259 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:50,259 INFO L82 PathProgramCache]: Analyzing trace with hash -1339163482, now seen corresponding path program 210 times [2020-10-09 10:48:50,259 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:50,259 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789822345] [2020-10-09 10:48:50,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:50,263 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:50,525 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:50,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789822345] [2020-10-09 10:48:50,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [228175205] [2020-10-09 10:48:50,526 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 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 237 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:50,570 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2020-10-09 10:48:50,571 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:50,572 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:50,572 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:51,063 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:51,063 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:51,063 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:51,063 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1982318555] [2020-10-09 10:48:51,064 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:51,064 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:51,064 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:51,064 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:51,064 INFO L87 Difference]: Start difference. First operand 162 states and 399 transitions. Second operand 17 states. [2020-10-09 10:48:52,228 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:52,229 INFO L93 Difference]: Finished difference Result 250 states and 575 transitions. [2020-10-09 10:48:52,232 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:48:52,232 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:52,233 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:52,233 INFO L225 Difference]: With dead ends: 250 [2020-10-09 10:48:52,234 INFO L226 Difference]: Without dead ends: 248 [2020-10-09 10:48:52,234 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 238 ImplicationChecksByTransitivity, 1.5s TimeCoverageRelationStatistics Valid=258, Invalid=672, Unknown=0, NotChecked=0, Total=930 [2020-10-09 10:48:52,235 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 248 states. [2020-10-09 10:48:52,237 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 248 to 164. [2020-10-09 10:48:52,237 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:48:52,237 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-09 10:48:52,237 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-09 10:48:52,238 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:52,238 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-09 10:48:52,238 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:52,238 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-09 10:48:52,238 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:52,238 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:52,238 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:52,439 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 237 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable243 [2020-10-09 10:48:52,439 INFO L429 AbstractCegarLoop]: === Iteration 245 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:52,439 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:52,440 INFO L82 PathProgramCache]: Analyzing trace with hash -1339162521, now seen corresponding path program 211 times [2020-10-09 10:48:52,440 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:52,440 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1757638543] [2020-10-09 10:48:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:52,444 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:52,661 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:52,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1757638543] [2020-10-09 10:48:52,661 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1962644148] [2020-10-09 10:48:52,662 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 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 238 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:52,700 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:52,702 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:52,702 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:53,140 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:53,141 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:53,141 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:53,141 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1910136601] [2020-10-09 10:48:53,142 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:53,142 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:53,142 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:53,142 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=59, Invalid=213, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:53,142 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-09 10:48:54,247 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:54,247 INFO L93 Difference]: Finished difference Result 245 states and 564 transitions. [2020-10-09 10:48:54,251 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2020-10-09 10:48:54,252 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:54,252 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:54,252 INFO L225 Difference]: With dead ends: 245 [2020-10-09 10:48:54,252 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:48:54,253 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 189 ImplicationChecksByTransitivity, 1.3s TimeCoverageRelationStatistics Valid=220, Invalid=592, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:48:54,253 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:48:54,256 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 164. [2020-10-09 10:48:54,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 164 states. [2020-10-09 10:48:54,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 164 states to 164 states and 407 transitions. [2020-10-09 10:48:54,257 INFO L78 Accepts]: Start accepts. Automaton has 164 states and 407 transitions. Word has length 14 [2020-10-09 10:48:54,257 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:54,257 INFO L481 AbstractCegarLoop]: Abstraction has 164 states and 407 transitions. [2020-10-09 10:48:54,257 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:54,257 INFO L276 IsEmpty]: Start isEmpty. Operand 164 states and 407 transitions. [2020-10-09 10:48:54,257 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:54,257 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:54,257 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:54,458 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable244,238 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:54,458 INFO L429 AbstractCegarLoop]: === Iteration 246 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:54,459 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:54,459 INFO L82 PathProgramCache]: Analyzing trace with hash -1339133691, now seen corresponding path program 212 times [2020-10-09 10:48:54,459 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:54,459 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [99998510] [2020-10-09 10:48:54,460 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:54,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:54,721 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:54,721 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [99998510] [2020-10-09 10:48:54,722 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [328038957] [2020-10-09 10:48:54,722 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 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 239 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:54,763 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:48:54,763 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:54,765 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:54,766 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:55,294 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:55,294 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:55,294 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:55,295 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1335816698] [2020-10-09 10:48:55,295 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:55,295 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:55,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:55,295 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:55,295 INFO L87 Difference]: Start difference. First operand 164 states and 407 transitions. Second operand 17 states. [2020-10-09 10:48:56,847 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:56,847 INFO L93 Difference]: Finished difference Result 262 states and 602 transitions. [2020-10-09 10:48:56,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:48:56,851 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:56,851 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:56,852 INFO L225 Difference]: With dead ends: 262 [2020-10-09 10:48:56,852 INFO L226 Difference]: Without dead ends: 260 [2020-10-09 10:48:56,852 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 301 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=305, Invalid=817, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:48:56,853 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 260 states. [2020-10-09 10:48:56,855 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 260 to 165. [2020-10-09 10:48:56,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:48:56,856 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-09 10:48:56,856 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-09 10:48:56,856 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:56,856 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-09 10:48:56,856 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:56,857 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-09 10:48:56,857 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:56,857 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:56,857 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:57,057 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 239 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable245 [2020-10-09 10:48:57,058 INFO L429 AbstractCegarLoop]: === Iteration 247 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:57,058 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:57,058 INFO L82 PathProgramCache]: Analyzing trace with hash -1318607692, now seen corresponding path program 213 times [2020-10-09 10:48:57,064 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:57,064 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1562867833] [2020-10-09 10:48:57,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:57,067 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:57,285 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:57,285 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1562867833] [2020-10-09 10:48:57,286 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [138241333] [2020-10-09 10:48:57,286 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 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 240 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:57,331 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2020-10-09 10:48:57,331 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:57,333 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:57,333 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:48:57,809 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:57,809 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:48:57,809 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:48:57,810 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [336344319] [2020-10-09 10:48:57,810 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:48:57,810 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:48:57,811 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:48:57,811 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:48:57,811 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-09 10:48:59,253 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:48:59,253 INFO L93 Difference]: Finished difference Result 254 states and 594 transitions. [2020-10-09 10:48:59,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2020-10-09 10:48:59,255 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:48:59,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:48:59,256 INFO L225 Difference]: With dead ends: 254 [2020-10-09 10:48:59,256 INFO L226 Difference]: Without dead ends: 252 [2020-10-09 10:48:59,256 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 267 ImplicationChecksByTransitivity, 1.7s TimeCoverageRelationStatistics Valid=303, Invalid=753, Unknown=0, NotChecked=0, Total=1056 [2020-10-09 10:48:59,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 252 states. [2020-10-09 10:48:59,258 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 252 to 166. [2020-10-09 10:48:59,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 166 states. [2020-10-09 10:48:59,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 166 states to 166 states and 416 transitions. [2020-10-09 10:48:59,259 INFO L78 Accepts]: Start accepts. Automaton has 166 states and 416 transitions. Word has length 14 [2020-10-09 10:48:59,259 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:48:59,259 INFO L481 AbstractCegarLoop]: Abstraction has 166 states and 416 transitions. [2020-10-09 10:48:59,259 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:48:59,259 INFO L276 IsEmpty]: Start isEmpty. Operand 166 states and 416 transitions. [2020-10-09 10:48:59,259 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:48:59,259 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:48:59,259 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:48:59,460 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 240 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable246 [2020-10-09 10:48:59,460 INFO L429 AbstractCegarLoop]: === Iteration 248 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:48:59,461 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:48:59,461 INFO L82 PathProgramCache]: Analyzing trace with hash -1318606731, now seen corresponding path program 214 times [2020-10-09 10:48:59,461 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:48:59,462 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [948242312] [2020-10-09 10:48:59,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:48:59,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:48:59,741 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:48:59,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [948242312] [2020-10-09 10:48:59,742 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1530558810] [2020-10-09 10:48:59,742 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 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 241 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:48:59,784 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:48:59,785 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:48:59,786 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:48:59,786 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:00,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:00,279 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:00,279 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:00,279 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642572607] [2020-10-09 10:49:00,280 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:00,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:00,280 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:00,280 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=209, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:00,280 INFO L87 Difference]: Start difference. First operand 166 states and 416 transitions. Second operand 17 states. [2020-10-09 10:49:01,740 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:01,740 INFO L93 Difference]: Finished difference Result 248 states and 576 transitions. [2020-10-09 10:49:01,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:49:01,745 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:01,745 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:01,745 INFO L225 Difference]: With dead ends: 248 [2020-10-09 10:49:01,745 INFO L226 Difference]: Without dead ends: 246 [2020-10-09 10:49:01,746 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 248 ImplicationChecksByTransitivity, 1.8s TimeCoverageRelationStatistics Valid=277, Invalid=715, Unknown=0, NotChecked=0, Total=992 [2020-10-09 10:49:01,746 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 246 states. [2020-10-09 10:49:01,749 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 246 to 167. [2020-10-09 10:49:01,749 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:49:01,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-09 10:49:01,750 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-09 10:49:01,750 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:01,750 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-09 10:49:01,750 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:01,750 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-09 10:49:01,750 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:01,750 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:01,750 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:01,951 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable247,241 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:01,951 INFO L429 AbstractCegarLoop]: === Iteration 249 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:01,952 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:01,952 INFO L82 PathProgramCache]: Analyzing trace with hash -1317944602, now seen corresponding path program 215 times [2020-10-09 10:49:01,952 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:01,952 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1420314232] [2020-10-09 10:49:01,953 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:01,956 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:02,218 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:02,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1420314232] [2020-10-09 10:49:02,219 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1885981276] [2020-10-09 10:49:02,219 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 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 242 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:02,266 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 4 check-sat command(s) [2020-10-09 10:49:02,267 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:02,268 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:02,269 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:02,711 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:02,711 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:02,711 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:02,712 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [505235577] [2020-10-09 10:49:02,712 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:02,712 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:02,712 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:02,712 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=203, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:02,712 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-09 10:49:04,320 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:04,320 INFO L93 Difference]: Finished difference Result 245 states and 579 transitions. [2020-10-09 10:49:04,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2020-10-09 10:49:04,324 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:04,324 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:04,325 INFO L225 Difference]: With dead ends: 245 [2020-10-09 10:49:04,325 INFO L226 Difference]: Without dead ends: 243 [2020-10-09 10:49:04,326 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 287 ImplicationChecksByTransitivity, 1.9s TimeCoverageRelationStatistics Valid=324, Invalid=798, Unknown=0, NotChecked=0, Total=1122 [2020-10-09 10:49:04,326 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 243 states. [2020-10-09 10:49:04,329 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 243 to 169. [2020-10-09 10:49:04,329 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:49:04,330 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-09 10:49:04,330 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-09 10:49:04,331 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:04,331 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-09 10:49:04,331 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:04,332 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-09 10:49:04,333 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:04,333 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:04,333 INFO L421 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:04,541 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable248,242 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:04,542 INFO L429 AbstractCegarLoop]: === Iteration 250 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:04,542 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:04,542 INFO L82 PathProgramCache]: Analyzing trace with hash -1317923243, now seen corresponding path program 216 times [2020-10-09 10:49:04,543 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:04,543 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [646850575] [2020-10-09 10:49:04,543 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:04,808 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:04,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [646850575] [2020-10-09 10:49:04,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1843506052] [2020-10-09 10:49:04,809 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 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 243 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:04,856 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:49:04,856 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:04,857 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:04,858 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:05,201 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:49:05,232 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:05,232 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:05,232 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:05,233 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1056949359] [2020-10-09 10:49:05,233 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:05,233 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:05,233 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:05,234 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:05,234 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-09 10:49:06,277 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:06,277 INFO L93 Difference]: Finished difference Result 223 states and 540 transitions. [2020-10-09 10:49:06,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-09 10:49:06,281 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:06,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:06,282 INFO L225 Difference]: With dead ends: 223 [2020-10-09 10:49:06,282 INFO L226 Difference]: Without dead ends: 218 [2020-10-09 10:49:06,283 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 27 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 174 ImplicationChecksByTransitivity, 1.4s TimeCoverageRelationStatistics Valid=258, Invalid=554, Unknown=0, NotChecked=0, Total=812 [2020-10-09 10:49:06,283 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 218 states. [2020-10-09 10:49:06,285 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 218 to 169. [2020-10-09 10:49:06,285 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:49:06,286 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-09 10:49:06,286 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-09 10:49:06,286 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:06,286 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-09 10:49:06,286 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:06,286 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-09 10:49:06,286 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:06,287 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:06,287 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:06,487 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 243 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable249 [2020-10-09 10:49:06,488 INFO L429 AbstractCegarLoop]: === Iteration 251 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:06,488 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:06,488 INFO L82 PathProgramCache]: Analyzing trace with hash -1317922282, now seen corresponding path program 217 times [2020-10-09 10:49:06,488 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:06,489 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1097512036] [2020-10-09 10:49:06,489 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:06,493 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:06,785 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:06,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1097512036] [2020-10-09 10:49:06,786 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1761843760] [2020-10-09 10:49:06,786 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 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 244 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:06,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:06,833 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:06,834 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:07,258 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:49:07,385 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:07,386 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:07,386 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:07,386 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1575546283] [2020-10-09 10:49:07,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:07,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:07,387 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:07,387 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=77, Invalid=195, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:07,387 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-09 10:49:09,397 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:09,398 INFO L93 Difference]: Finished difference Result 286 states and 679 transitions. [2020-10-09 10:49:09,401 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 27 states. [2020-10-09 10:49:09,402 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:09,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:09,402 INFO L225 Difference]: With dead ends: 286 [2020-10-09 10:49:09,403 INFO L226 Difference]: Without dead ends: 281 [2020-10-09 10:49:09,403 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 349 ImplicationChecksByTransitivity, 2.3s TimeCoverageRelationStatistics Valid=384, Invalid=948, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:49:09,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 281 states. [2020-10-09 10:49:09,406 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 281 to 167. [2020-10-09 10:49:09,407 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 167 states. [2020-10-09 10:49:09,407 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 167 states to 167 states and 418 transitions. [2020-10-09 10:49:09,407 INFO L78 Accepts]: Start accepts. Automaton has 167 states and 418 transitions. Word has length 14 [2020-10-09 10:49:09,407 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:09,407 INFO L481 AbstractCegarLoop]: Abstraction has 167 states and 418 transitions. [2020-10-09 10:49:09,408 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:09,408 INFO L276 IsEmpty]: Start isEmpty. Operand 167 states and 418 transitions. [2020-10-09 10:49:09,408 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:09,408 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:09,408 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:09,608 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable250,244 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:09,609 INFO L429 AbstractCegarLoop]: === Iteration 252 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:09,609 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:09,610 INFO L82 PathProgramCache]: Analyzing trace with hash -1317914811, now seen corresponding path program 218 times [2020-10-09 10:49:09,610 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:09,610 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1195029450] [2020-10-09 10:49:09,610 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:09,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:09,851 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1195029450] [2020-10-09 10:49:09,852 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1758361098] [2020-10-09 10:49:09,852 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 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 245 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:09,891 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:49:09,891 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:09,892 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:09,893 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:10,390 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:10,390 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:10,391 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:10,391 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [364872174] [2020-10-09 10:49:10,391 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:10,391 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:10,391 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:10,392 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=201, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:10,392 INFO L87 Difference]: Start difference. First operand 167 states and 418 transitions. Second operand 17 states. [2020-10-09 10:49:12,470 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:12,470 INFO L93 Difference]: Finished difference Result 268 states and 630 transitions. [2020-10-09 10:49:12,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 26 states. [2020-10-09 10:49:12,475 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:12,475 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:12,476 INFO L225 Difference]: With dead ends: 268 [2020-10-09 10:49:12,476 INFO L226 Difference]: Without dead ends: 266 [2020-10-09 10:49:12,476 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 33 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 319 ImplicationChecksByTransitivity, 2.2s TimeCoverageRelationStatistics Valid=335, Invalid=855, Unknown=0, NotChecked=0, Total=1190 [2020-10-09 10:49:12,477 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 266 states. [2020-10-09 10:49:12,478 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 266 to 169. [2020-10-09 10:49:12,479 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:49:12,479 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-09 10:49:12,479 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-09 10:49:12,479 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:12,480 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-09 10:49:12,480 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:12,480 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-09 10:49:12,480 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:12,480 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:12,480 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:12,681 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 245 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable251 [2020-10-09 10:49:12,681 INFO L429 AbstractCegarLoop]: === Iteration 253 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:12,682 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:12,682 INFO L82 PathProgramCache]: Analyzing trace with hash -1317893452, now seen corresponding path program 219 times [2020-10-09 10:49:12,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:12,683 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [831811487] [2020-10-09 10:49:12,683 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:12,687 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:12,979 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:12,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [831811487] [2020-10-09 10:49:12,980 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [503539195] [2020-10-09 10:49:12,980 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 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 246 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:13,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:49:13,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:13,026 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:13,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:13,478 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:49:13,581 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:13,581 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:13,581 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:13,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [212656390] [2020-10-09 10:49:13,582 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:13,582 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:13,582 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:13,582 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:13,582 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-09 10:49:14,832 WARN L193 SmtUtils]: Spent 100.00 ms on a formula simplification. DAG size of input: 38 DAG size of output: 26 [2020-10-09 10:49:16,243 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:16,243 INFO L93 Difference]: Finished difference Result 296 states and 707 transitions. [2020-10-09 10:49:16,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:49:16,247 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:16,247 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:16,248 INFO L225 Difference]: With dead ends: 296 [2020-10-09 10:49:16,248 INFO L226 Difference]: Without dead ends: 291 [2020-10-09 10:49:16,248 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 36 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 370 ImplicationChecksByTransitivity, 2.8s TimeCoverageRelationStatistics Valid=419, Invalid=987, Unknown=0, NotChecked=0, Total=1406 [2020-10-09 10:49:16,248 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 291 states. [2020-10-09 10:49:16,251 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 291 to 169. [2020-10-09 10:49:16,251 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:49:16,251 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 425 transitions. [2020-10-09 10:49:16,251 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 425 transitions. Word has length 14 [2020-10-09 10:49:16,251 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:16,251 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 425 transitions. [2020-10-09 10:49:16,251 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:16,252 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 425 transitions. [2020-10-09 10:49:16,252 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:16,252 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:16,252 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:16,452 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable252,246 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:16,454 INFO L429 AbstractCegarLoop]: === Iteration 254 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:16,454 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:16,455 INFO L82 PathProgramCache]: Analyzing trace with hash -1317892491, now seen corresponding path program 220 times [2020-10-09 10:49:16,455 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:16,455 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790949866] [2020-10-09 10:49:16,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:16,459 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:16,737 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:16,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790949866] [2020-10-09 10:49:16,738 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [747261207] [2020-10-09 10:49:16,738 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 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 247 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:16,777 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-09 10:49:16,778 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:16,779 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:16,780 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:17,194 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-09 10:49:17,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:17,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:17,245 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:17,245 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1117910726] [2020-10-09 10:49:17,245 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:17,245 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:17,246 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:17,246 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=78, Invalid=194, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:17,246 INFO L87 Difference]: Start difference. First operand 169 states and 425 transitions. Second operand 17 states. [2020-10-09 10:49:19,479 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:19,479 INFO L93 Difference]: Finished difference Result 299 states and 710 transitions. [2020-10-09 10:49:19,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:49:19,482 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:19,482 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:19,483 INFO L225 Difference]: With dead ends: 299 [2020-10-09 10:49:19,483 INFO L226 Difference]: Without dead ends: 294 [2020-10-09 10:49:19,483 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 44 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 38 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 446 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=476, Invalid=1084, Unknown=0, NotChecked=0, Total=1560 [2020-10-09 10:49:19,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 294 states. [2020-10-09 10:49:19,486 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 294 to 165. [2020-10-09 10:49:19,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 165 states. [2020-10-09 10:49:19,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 165 states to 165 states and 411 transitions. [2020-10-09 10:49:19,487 INFO L78 Accepts]: Start accepts. Automaton has 165 states and 411 transitions. Word has length 14 [2020-10-09 10:49:19,487 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:19,487 INFO L481 AbstractCegarLoop]: Abstraction has 165 states and 411 transitions. [2020-10-09 10:49:19,488 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:19,488 INFO L276 IsEmpty]: Start isEmpty. Operand 165 states and 411 transitions. [2020-10-09 10:49:19,488 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:19,488 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:19,488 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:19,698 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable253,247 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:19,699 INFO L429 AbstractCegarLoop]: === Iteration 255 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:19,699 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:19,699 INFO L82 PathProgramCache]: Analyzing trace with hash -1317684171, now seen corresponding path program 221 times [2020-10-09 10:49:19,700 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:19,700 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1593915912] [2020-10-09 10:49:19,700 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:19,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:19,965 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:19,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1593915912] [2020-10-09 10:49:19,966 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [475483553] [2020-10-09 10:49:19,966 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 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 248 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:20,014 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-09 10:49:20,015 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:20,016 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:20,016 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:20,714 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:20,715 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:20,715 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:20,715 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [694793611] [2020-10-09 10:49:20,715 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:20,716 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:20,716 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:20,716 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=207, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:20,716 INFO L87 Difference]: Start difference. First operand 165 states and 411 transitions. Second operand 17 states. [2020-10-09 10:49:23,008 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:23,008 INFO L93 Difference]: Finished difference Result 274 states and 633 transitions. [2020-10-09 10:49:23,011 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:49:23,012 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:23,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:23,013 INFO L225 Difference]: With dead ends: 274 [2020-10-09 10:49:23,013 INFO L226 Difference]: Without dead ends: 272 [2020-10-09 10:49:23,014 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 34 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 341 ImplicationChecksByTransitivity, 2.6s TimeCoverageRelationStatistics Valid=358, Invalid=902, Unknown=0, NotChecked=0, Total=1260 [2020-10-09 10:49:23,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 272 states. [2020-10-09 10:49:23,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 272 to 169. [2020-10-09 10:49:23,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 169 states. [2020-10-09 10:49:23,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 169 states to 169 states and 426 transitions. [2020-10-09 10:49:23,017 INFO L78 Accepts]: Start accepts. Automaton has 169 states and 426 transitions. Word has length 14 [2020-10-09 10:49:23,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:23,018 INFO L481 AbstractCegarLoop]: Abstraction has 169 states and 426 transitions. [2020-10-09 10:49:23,018 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:23,018 INFO L276 IsEmpty]: Start isEmpty. Operand 169 states and 426 transitions. [2020-10-09 10:49:23,018 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:23,018 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:23,018 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:23,226 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable254,248 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:23,227 INFO L429 AbstractCegarLoop]: === Iteration 256 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:23,227 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:23,228 INFO L82 PathProgramCache]: Analyzing trace with hash -1317021081, now seen corresponding path program 222 times [2020-10-09 10:49:23,228 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:23,228 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [673948671] [2020-10-09 10:49:23,229 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:23,234 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:23,469 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:23,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [673948671] [2020-10-09 10:49:23,470 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1650329185] [2020-10-09 10:49:23,470 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 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 249 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:23,513 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-09 10:49:23,514 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:23,515 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:23,516 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:24,035 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:24,036 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:24,036 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:24,036 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1194403075] [2020-10-09 10:49:24,036 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:24,037 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:24,037 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:24,037 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=199, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:24,037 INFO L87 Difference]: Start difference. First operand 169 states and 426 transitions. Second operand 17 states. [2020-10-09 10:49:26,353 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:26,353 INFO L93 Difference]: Finished difference Result 282 states and 670 transitions. [2020-10-09 10:49:26,357 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 29 states. [2020-10-09 10:49:26,358 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:26,358 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:26,359 INFO L225 Difference]: With dead ends: 282 [2020-10-09 10:49:26,359 INFO L226 Difference]: Without dead ends: 280 [2020-10-09 10:49:26,359 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 356 ImplicationChecksByTransitivity, 2.5s TimeCoverageRelationStatistics Valid=397, Invalid=935, Unknown=0, NotChecked=0, Total=1332 [2020-10-09 10:49:26,360 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 280 states. [2020-10-09 10:49:26,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 280 to 174. [2020-10-09 10:49:26,363 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 174 states. [2020-10-09 10:49:26,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 174 states to 174 states and 442 transitions. [2020-10-09 10:49:26,364 INFO L78 Accepts]: Start accepts. Automaton has 174 states and 442 transitions. Word has length 14 [2020-10-09 10:49:26,364 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:26,364 INFO L481 AbstractCegarLoop]: Abstraction has 174 states and 442 transitions. [2020-10-09 10:49:26,364 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:26,365 INFO L276 IsEmpty]: Start isEmpty. Operand 174 states and 442 transitions. [2020-10-09 10:49:26,365 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:26,365 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:26,366 INFO L421 BasicCegarLoop]: trace histogram [4, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:26,572 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 249 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable255 [2020-10-09 10:49:26,572 INFO L429 AbstractCegarLoop]: === Iteration 257 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:26,573 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:26,573 INFO L82 PathProgramCache]: Analyzing trace with hash -1316999722, now seen corresponding path program 223 times [2020-10-09 10:49:26,573 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:26,574 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [811499198] [2020-10-09 10:49:26,574 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:26,579 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:26,865 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:26,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [811499198] [2020-10-09 10:49:26,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1762152691] [2020-10-09 10:49:26,866 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 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 250 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:26,906 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:26,907 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:26,908 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:27,323 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:49:27,402 INFO L134 CoverageAnalysis]: Checked inductivity of 7 backedges. 0 proven. 7 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:27,402 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:27,403 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:27,403 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1273046175] [2020-10-09 10:49:27,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:27,404 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:27,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:27,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:49:27,404 INFO L87 Difference]: Start difference. First operand 174 states and 442 transitions. Second operand 17 states. [2020-10-09 10:49:30,496 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:49:30,496 INFO L93 Difference]: Finished difference Result 321 states and 773 transitions. [2020-10-09 10:49:30,500 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 35 states. [2020-10-09 10:49:30,501 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:49:30,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:49:30,502 INFO L225 Difference]: With dead ends: 321 [2020-10-09 10:49:30,502 INFO L226 Difference]: Without dead ends: 313 [2020-10-09 10:49:30,502 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 531 ImplicationChecksByTransitivity, 3.2s TimeCoverageRelationStatistics Valid=528, Invalid=1278, Unknown=0, NotChecked=0, Total=1806 [2020-10-09 10:49:30,503 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 313 states. [2020-10-09 10:49:30,505 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 313 to 176. [2020-10-09 10:49:30,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 176 states. [2020-10-09 10:49:30,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 176 states to 176 states and 452 transitions. [2020-10-09 10:49:30,506 INFO L78 Accepts]: Start accepts. Automaton has 176 states and 452 transitions. Word has length 14 [2020-10-09 10:49:30,506 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:49:30,506 INFO L481 AbstractCegarLoop]: Abstraction has 176 states and 452 transitions. [2020-10-09 10:49:30,506 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:49:30,506 INFO L276 IsEmpty]: Start isEmpty. Operand 176 states and 452 transitions. [2020-10-09 10:49:30,507 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:49:30,507 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:49:30,507 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:49:30,708 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 250 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable256 [2020-10-09 10:49:30,709 INFO L429 AbstractCegarLoop]: === Iteration 258 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:49:30,709 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:49:30,710 INFO L82 PathProgramCache]: Analyzing trace with hash -1316998761, now seen corresponding path program 224 times [2020-10-09 10:49:30,710 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:49:30,710 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [192524341] [2020-10-09 10:49:30,710 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:49:30,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:49:30,982 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:30,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [192524341] [2020-10-09 10:49:30,983 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1551053764] [2020-10-09 10:49:30,983 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 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 251 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:49:31,024 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-09 10:49:31,024 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:49:31,025 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:49:31,026 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:49:35,661 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:49:35,778 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:49:35,779 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:49:35,779 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:49:35,779 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [706941534] [2020-10-09 10:49:35,779 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:49:35,779 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:49:35,780 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:49:35,780 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=190, Unknown=2, NotChecked=0, Total=272 [2020-10-09 10:49:35,780 INFO L87 Difference]: Start difference. First operand 176 states and 452 transitions. Second operand 17 states. [2020-10-09 10:49:41,045 WARN L193 SmtUtils]: Spent 4.15 s on a formula simplification. DAG size of input: 54 DAG size of output: 36 [2020-10-09 10:49:45,281 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 47 DAG size of output: 37 [2020-10-09 10:49:45,453 WARN L193 SmtUtils]: Spent 102.00 ms on a formula simplification. DAG size of input: 33 DAG size of output: 31 [2020-10-09 10:49:49,744 WARN L193 SmtUtils]: Spent 4.17 s on a formula simplification. DAG size of input: 58 DAG size of output: 39 [2020-10-09 10:49:54,200 WARN L193 SmtUtils]: Spent 4.16 s on a formula simplification. DAG size of input: 51 DAG size of output: 40 [2020-10-09 10:49:56,361 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 32 [2020-10-09 10:49:57,220 WARN L193 SmtUtils]: Spent 105.00 ms on a formula simplification. DAG size of input: 36 DAG size of output: 33 [2020-10-09 10:50:01,456 WARN L193 SmtUtils]: Spent 4.11 s on a formula simplification. DAG size of input: 37 DAG size of output: 35 [2020-10-09 10:50:02,520 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-09 10:50:02,520 INFO L93 Difference]: Finished difference Result 323 states and 782 transitions. [2020-10-09 10:50:02,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 33 states. [2020-10-09 10:50:02,523 INFO L78 Accepts]: Start accepts. Automaton has 17 states. Word has length 14 [2020-10-09 10:50:02,523 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-09 10:50:02,523 INFO L225 Difference]: With dead ends: 323 [2020-10-09 10:50:02,523 INFO L226 Difference]: Without dead ends: 315 [2020-10-09 10:50:02,524 INFO L673 BasicCegarLoop]: 0 DeclaredPredicates, 47 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 41 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 491 ImplicationChecksByTransitivity, 30.5s TimeCoverageRelationStatistics Valid=530, Invalid=1274, Unknown=2, NotChecked=0, Total=1806 [2020-10-09 10:50:02,524 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 315 states. [2020-10-09 10:50:02,527 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 315 to 171. [2020-10-09 10:50:02,527 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 171 states. [2020-10-09 10:50:02,527 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 171 states to 171 states and 436 transitions. [2020-10-09 10:50:02,527 INFO L78 Accepts]: Start accepts. Automaton has 171 states and 436 transitions. Word has length 14 [2020-10-09 10:50:02,527 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-09 10:50:02,528 INFO L481 AbstractCegarLoop]: Abstraction has 171 states and 436 transitions. [2020-10-09 10:50:02,528 INFO L482 AbstractCegarLoop]: Interpolant automaton has 17 states. [2020-10-09 10:50:02,528 INFO L276 IsEmpty]: Start isEmpty. Operand 171 states and 436 transitions. [2020-10-09 10:50:02,528 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2020-10-09 10:50:02,528 INFO L413 BasicCegarLoop]: Found error trace [2020-10-09 10:50:02,528 INFO L421 BasicCegarLoop]: trace histogram [3, 3, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-09 10:50:02,728 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 251 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable257 [2020-10-09 10:50:02,729 INFO L429 AbstractCegarLoop]: === Iteration 259 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-09 10:50:02,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-09 10:50:02,729 INFO L82 PathProgramCache]: Analyzing trace with hash -1316969931, now seen corresponding path program 225 times [2020-10-09 10:50:02,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-09 10:50:02,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692346552] [2020-10-09 10:50:02,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-09 10:50:02,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-09 10:50:02,948 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:50:02,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692346552] [2020-10-09 10:50:02,949 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1331583067] [2020-10-09 10:50:02,949 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 252 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-09 10:50:02,988 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-09 10:50:02,988 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-09 10:50:02,989 INFO L263 TraceCheckSpWp]: Trace formula consists of 94 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-09 10:50:02,989 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-09 10:50:03,340 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-09 10:50:03,385 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-09 10:50:03,385 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-09 10:50:03,385 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 15 [2020-10-09 10:50:03,385 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [781038569] [2020-10-09 10:50:03,386 INFO L461 AbstractCegarLoop]: Interpolant automaton has 17 states [2020-10-09 10:50:03,386 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-09 10:50:03,386 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2020-10-09 10:50:03,386 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=80, Invalid=192, Unknown=0, NotChecked=0, Total=272 [2020-10-09 10:50:03,386 INFO L87 Difference]: Start difference. First operand 171 states and 436 transitions. Second operand 17 states. Received shutdown request... [2020-10-09 10:50:03,968 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-09 10:50:04,169 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 252 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable258 [2020-10-09 10:50:04,169 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-09 10:50:04,173 WARN L235 ceAbstractionStarter]: Timeout [2020-10-09 10:50:04,174 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 09.10 10:50:04 BasicIcfg [2020-10-09 10:50:04,174 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-09 10:50:04,175 INFO L168 Benchmark]: Toolchain (without parser) took 873609.58 ms. Allocated memory was 249.6 MB in the beginning and 217.1 MB in the end (delta: -32.5 MB). Free memory was 202.6 MB in the beginning and 180.2 MB in the end (delta: 22.4 MB). Peak memory consumption was 33.5 MB. Max. memory is 14.2 GB. [2020-10-09 10:50:04,175 INFO L168 Benchmark]: CDTParser took 1.23 ms. Allocated memory is still 249.6 MB. Free memory is still 223.4 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 10:50:04,175 INFO L168 Benchmark]: CACSL2BoogieTranslator took 773.24 ms. Allocated memory was 249.6 MB in the beginning and 307.8 MB in the end (delta: 58.2 MB). Free memory was 202.6 MB in the beginning and 263.3 MB in the end (delta: -60.6 MB). Peak memory consumption was 30.2 MB. Max. memory is 14.2 GB. [2020-10-09 10:50:04,176 INFO L168 Benchmark]: Boogie Procedure Inliner took 44.03 ms. Allocated memory is still 307.8 MB. Free memory was 263.3 MB in the beginning and 260.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. [2020-10-09 10:50:04,176 INFO L168 Benchmark]: Boogie Preprocessor took 25.10 ms. Allocated memory is still 307.8 MB. Free memory is still 260.7 MB. There was no memory consumed. Max. memory is 14.2 GB. [2020-10-09 10:50:04,176 INFO L168 Benchmark]: RCFGBuilder took 375.19 ms. Allocated memory is still 307.8 MB. Free memory was 260.7 MB in the beginning and 238.9 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. [2020-10-09 10:50:04,177 INFO L168 Benchmark]: TraceAbstraction took 872386.61 ms. Allocated memory was 307.8 MB in the beginning and 217.1 MB in the end (delta: -90.7 MB). Free memory was 238.9 MB in the beginning and 180.2 MB in the end (delta: 58.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 14.2 GB. [2020-10-09 10:50:04,181 INFO L336 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 1.23 ms. Allocated memory is still 249.6 MB. Free memory is still 223.4 MB. There was no memory consumed. Max. memory is 14.2 GB. * CACSL2BoogieTranslator took 773.24 ms. Allocated memory was 249.6 MB in the beginning and 307.8 MB in the end (delta: 58.2 MB). Free memory was 202.6 MB in the beginning and 263.3 MB in the end (delta: -60.6 MB). Peak memory consumption was 30.2 MB. Max. memory is 14.2 GB. * Boogie Procedure Inliner took 44.03 ms. Allocated memory is still 307.8 MB. Free memory was 263.3 MB in the beginning and 260.7 MB in the end (delta: 2.5 MB). Peak memory consumption was 2.5 MB. Max. memory is 14.2 GB. * Boogie Preprocessor took 25.10 ms. Allocated memory is still 307.8 MB. Free memory is still 260.7 MB. There was no memory consumed. Max. memory is 14.2 GB. * RCFGBuilder took 375.19 ms. Allocated memory is still 307.8 MB. Free memory was 260.7 MB in the beginning and 238.9 MB in the end (delta: 21.8 MB). Peak memory consumption was 21.8 MB. Max. memory is 14.2 GB. * TraceAbstraction took 872386.61 ms. Allocated memory was 307.8 MB in the beginning and 217.1 MB in the end (delta: -90.7 MB). Free memory was 238.9 MB in the beginning and 180.2 MB in the end (delta: 58.7 MB). Peak memory consumption was 11.6 MB. Max. memory is 14.2 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 721 VarBasedMoverChecksPositive, 19 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 19 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.1s, 21 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.2s, 59 PlacesBefore, 20 PlacesAfterwards, 57 TransitionsBefore, 15 TransitionsAfterwards, 1032 CoEnabledTransitionPairs, 5 FixpointIterations, 12 TrivialSequentialCompositions, 26 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 9 ConcurrentYvCompositions, 3 ChoiceCompositions, 50 TotalNumberOfCompositions, 1052 MoverChecksTotal - TimeoutResultAtElement [Line: 712]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 712). Cancelled while BasicCegarLoop was constructing difference of abstraction (171states) and FLOYD_HOARE automaton (currently 11 states, 17 states before enhancement),while PredicateComparison was comparing new predicate (quantified with 0quantifier alternations) to 24 known predicates. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 53 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 872.2s, OverallIterations: 259, TraceHistogramMax: 6, AutomataDifference: 660.7s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.2s, HoareTripleCheckerStatistics: 3365 SDtfs, 31058 SDslu, 25648 SDs, 0 SdLazy, 18249 SolverSat, 7710 SolverUnsat, 112 SolverUnknown, 0 SolverNotchecked, 241.4s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 7385 GetRequests, 1252 SyntacticMatches, 238 SemanticMatches, 5894 ConstructedPredicates, 1 IntricatePredicates, 0 DeprecatedPredicates, 38691 ImplicationChecksByTransitivity, 536.4s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=176occurred in iteration=257, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.9s AutomataMinimizationTime, 258 MinimizatonAttempts, 15284 StatesRemovedByMinimization, 258 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 1.4s SsaConstructionTime, 3.9s SatisfiabilityAnalysisTime, 144.3s InterpolantComputationTime, 6602 NumberOfCodeBlocks, 6602 NumberOfCodeBlocksAsserted, 809 NumberOfCheckSat, 6092 ConstructedInterpolants, 33 QuantifiedInterpolants, 676734 SizeOfPredicates, 251 NumberOfNonLiveVariables, 22324 ConjunctsInSsa, 2547 ConjunctsInUnsatCore, 510 InterpolantComputations, 8 PerfectInterpolantSequences, 0/2806 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available RESULT: Ultimate could not prove your program: Timeout Completed graceful shutdown