/usr/bin/java -Xmx8000000000 -Xss4m -jar ./plugins/org.eclipse.equinox.launcher_1.3.100.v20150511-1540.jar -data @noDefault -ultimatedata ./data -tc ../../../trunk/examples/toolchains/AutomizerCInline.xml -s ../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf -i ../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i -------------------------------------------------------------------------------- This is Ultimate 0.1.25-1d1d2b5 [2020-10-21 23:38:18,343 INFO L177 SettingsManager]: Resetting all preferences to default values... [2020-10-21 23:38:18,346 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2020-10-21 23:38:18,372 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2020-10-21 23:38:18,372 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2020-10-21 23:38:18,373 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2020-10-21 23:38:18,379 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2020-10-21 23:38:18,381 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2020-10-21 23:38:18,382 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2020-10-21 23:38:18,383 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2020-10-21 23:38:18,387 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2020-10-21 23:38:18,388 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2020-10-21 23:38:18,389 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2020-10-21 23:38:18,390 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2020-10-21 23:38:18,391 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2020-10-21 23:38:18,392 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2020-10-21 23:38:18,392 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2020-10-21 23:38:18,393 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2020-10-21 23:38:18,395 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2020-10-21 23:38:18,396 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2020-10-21 23:38:18,398 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2020-10-21 23:38:18,399 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2020-10-21 23:38:18,400 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2020-10-21 23:38:18,401 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2020-10-21 23:38:18,403 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2020-10-21 23:38:18,403 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2020-10-21 23:38:18,403 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2020-10-21 23:38:18,404 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2020-10-21 23:38:18,405 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2020-10-21 23:38:18,406 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2020-10-21 23:38:18,406 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2020-10-21 23:38:18,406 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2020-10-21 23:38:18,407 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2020-10-21 23:38:18,408 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2020-10-21 23:38:18,409 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2020-10-21 23:38:18,409 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2020-10-21 23:38:18,410 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2020-10-21 23:38:18,410 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2020-10-21 23:38:18,410 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2020-10-21 23:38:18,411 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2020-10-21 23:38:18,412 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2020-10-21 23:38:18,413 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/settings/automizer/mcr/svcomp-Reach-32bit-Automizer_Default-noMmResRef-FA-McrAutomaton-WP.epf [2020-10-21 23:38:18,437 INFO L113 SettingsManager]: Loading preferences was successful [2020-10-21 23:38:18,437 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2020-10-21 23:38:18,438 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2020-10-21 23:38:18,438 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2020-10-21 23:38:18,439 INFO L138 SettingsManager]: * Use SBE=true [2020-10-21 23:38:18,439 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2020-10-21 23:38:18,439 INFO L138 SettingsManager]: * sizeof long=4 [2020-10-21 23:38:18,439 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2020-10-21 23:38:18,440 INFO L138 SettingsManager]: * sizeof POINTER=4 [2020-10-21 23:38:18,440 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2020-10-21 23:38:18,440 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2020-10-21 23:38:18,440 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2020-10-21 23:38:18,440 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2020-10-21 23:38:18,440 INFO L138 SettingsManager]: * sizeof long double=12 [2020-10-21 23:38:18,441 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2020-10-21 23:38:18,441 INFO L138 SettingsManager]: * Use constant arrays=true [2020-10-21 23:38:18,441 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2020-10-21 23:38:18,441 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2020-10-21 23:38:18,441 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2020-10-21 23:38:18,442 INFO L138 SettingsManager]: * To the following directory=./dump/ [2020-10-21 23:38:18,442 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2020-10-21 23:38:18,442 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2020-10-21 23:38:18,442 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2020-10-21 23:38:18,442 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=Craig_NestedInterpolation [2020-10-21 23:38:18,443 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2020-10-21 23:38:18,443 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2020-10-21 23:38:18,443 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2020-10-21 23:38:18,443 INFO L138 SettingsManager]: * Override the interpolant automaton setting of the refinement strategy=true [2020-10-21 23:38:18,443 INFO L138 SettingsManager]: * Large block encoding in concurrent analysis=VARIABLE_BASED_MOVER_CHECK [2020-10-21 23:38:18,444 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2020-10-21 23:38:18,444 INFO L138 SettingsManager]: * Interpolant automaton=MCR [2020-10-21 23:38:18,755 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2020-10-21 23:38:18,773 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2020-10-21 23:38:18,777 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2020-10-21 23:38:18,779 INFO L271 PluginConnector]: Initializing CDTParser... [2020-10-21 23:38:18,779 INFO L275 PluginConnector]: CDTParser initialized [2020-10-21 23:38:18,781 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-21 23:38:18,857 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1697bfaad/81990dce1bad4e8fac44bf27fcbafa47/FLAG2ff8e4a1d [2020-10-21 23:38:19,444 INFO L306 CDTParser]: Found 1 translation units. [2020-10-21 23:38:19,445 INFO L160 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread/fib_bench_longer-1.i [2020-10-21 23:38:19,461 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1697bfaad/81990dce1bad4e8fac44bf27fcbafa47/FLAG2ff8e4a1d [2020-10-21 23:38:19,678 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/1697bfaad/81990dce1bad4e8fac44bf27fcbafa47 [2020-10-21 23:38:19,686 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2020-10-21 23:38:19,693 INFO L131 ToolchainWalker]: Walking toolchain with 5 elements. [2020-10-21 23:38:19,694 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2020-10-21 23:38:19,695 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2020-10-21 23:38:19,698 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2020-10-21 23:38:19,699 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 11:38:19" (1/1) ... [2020-10-21 23:38:19,702 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@af30ee2 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:19, skipping insertion in model container [2020-10-21 23:38:19,702 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 21.10 11:38:19" (1/1) ... [2020-10-21 23:38:19,710 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2020-10-21 23:38:19,764 INFO L178 MainTranslator]: Built tables and reachable declarations [2020-10-21 23:38:20,184 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 23:38:20,195 INFO L203 MainTranslator]: Completed pre-run [2020-10-21 23:38:20,241 INFO L206 PostProcessor]: Analyzing one entry point: main [2020-10-21 23:38:20,325 INFO L208 MainTranslator]: Completed translation [2020-10-21 23:38:20,326 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20 WrapperNode [2020-10-21 23:38:20,326 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2020-10-21 23:38:20,327 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2020-10-21 23:38:20,327 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2020-10-21 23:38:20,328 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2020-10-21 23:38:20,337 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,354 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,379 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2020-10-21 23:38:20,379 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2020-10-21 23:38:20,380 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2020-10-21 23:38:20,380 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2020-10-21 23:38:20,389 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,389 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,393 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,393 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,399 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,404 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,406 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (1/1) ... [2020-10-21 23:38:20,409 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2020-10-21 23:38:20,409 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2020-10-21 23:38:20,410 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2020-10-21 23:38:20,410 INFO L275 PluginConnector]: RCFGBuilder initialized [2020-10-21 23:38:20,411 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (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 [2020-10-21 23:38:20,483 INFO L130 BoogieDeclarations]: Found specification of procedure t1 [2020-10-21 23:38:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure t1 [2020-10-21 23:38:20,484 INFO L130 BoogieDeclarations]: Found specification of procedure t2 [2020-10-21 23:38:20,484 INFO L138 BoogieDeclarations]: Found implementation of procedure t2 [2020-10-21 23:38:20,485 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2020-10-21 23:38:20,485 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2020-10-21 23:38:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2020-10-21 23:38:20,486 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2020-10-21 23:38:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2020-10-21 23:38:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2020-10-21 23:38:20,487 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2020-10-21 23:38:20,487 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2020-10-21 23:38:20,489 WARN L208 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2020-10-21 23:38:20,913 INFO L293 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2020-10-21 23:38:20,914 INFO L298 CfgBuilder]: Removed 8 assume(true) statements. [2020-10-21 23:38:20,916 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 11:38:20 BoogieIcfgContainer [2020-10-21 23:38:20,917 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2020-10-21 23:38:20,918 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2020-10-21 23:38:20,918 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2020-10-21 23:38:20,922 INFO L275 PluginConnector]: TraceAbstraction initialized [2020-10-21 23:38:20,922 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 21.10 11:38:19" (1/3) ... [2020-10-21 23:38:20,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f44fa6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 11:38:20, skipping insertion in model container [2020-10-21 23:38:20,923 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 21.10 11:38:20" (2/3) ... [2020-10-21 23:38:20,923 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@6f44fa6a and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 21.10 11:38:20, skipping insertion in model container [2020-10-21 23:38:20,924 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 21.10 11:38:20" (3/3) ... [2020-10-21 23:38:20,926 INFO L111 eAbstractionObserver]: Analyzing ICFG fib_bench_longer-1.i [2020-10-21 23:38:20,938 WARN L153 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2020-10-21 23:38:20,938 INFO L164 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:Craig_NestedInterpolation Determinization: PREDICATE_ABSTRACTION [2020-10-21 23:38:20,946 INFO L176 ceAbstractionStarter]: Appying trace abstraction to program that has 1 error locations. [2020-10-21 23:38:20,948 INFO L348 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2020-10-21 23:38:20,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,973 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,974 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,975 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,975 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,976 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,976 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,977 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,977 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,977 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,978 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#in~arg.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,978 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,979 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,979 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,980 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,980 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,981 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,984 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,984 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,984 WARN L313 ript$VariableManager]: TermVariabe t1Thread1of1ForFork0_~k~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,984 WARN L313 ript$VariableManager]: TermVariabe |t1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,990 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.base not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,990 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~arg.offset not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,990 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,990 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,991 WARN L313 ript$VariableManager]: TermVariabe |t2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,991 WARN L313 ript$VariableManager]: TermVariabe t2Thread1of1ForFork1_~k~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2020-10-21 23:38:20,994 INFO L149 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2020-10-21 23:38:21,008 INFO L253 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2020-10-21 23:38:21,025 INFO L377 AbstractCegarLoop]: Interprodecural is true [2020-10-21 23:38:21,025 INFO L378 AbstractCegarLoop]: Hoare is true [2020-10-21 23:38:21,026 INFO L379 AbstractCegarLoop]: Compute interpolants for Craig_NestedInterpolation [2020-10-21 23:38:21,026 INFO L380 AbstractCegarLoop]: Backedges is MCR [2020-10-21 23:38:21,026 INFO L381 AbstractCegarLoop]: Determinization is PREDICATE_ABSTRACTION [2020-10-21 23:38:21,026 INFO L382 AbstractCegarLoop]: Difference is false [2020-10-21 23:38:21,026 INFO L383 AbstractCegarLoop]: Minimize is MINIMIZE_SEVPA [2020-10-21 23:38:21,026 INFO L387 AbstractCegarLoop]: ======== Iteration 0==of CEGAR loop == AllErrorsAtOnce======== [2020-10-21 23:38:21,039 INFO L137 etLargeBlockEncoding]: Petri net LBE is using variable-based independence relation. [2020-10-21 23:38:21,040 INFO L144 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 23:38:21,043 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 67 places, 66 transitions, 142 flow [2020-10-21 23:38:21,045 INFO L71 FinitePrefix]: Start finitePrefix. Operand has 67 places, 66 transitions, 142 flow [2020-10-21 23:38:21,085 INFO L129 PetriNetUnfolder]: 6/64 cut-off events. [2020-10-21 23:38:21,085 INFO L130 PetriNetUnfolder]: For 0/0 co-relation queries the response was YES. [2020-10-21 23:38:21,091 INFO L80 FinitePrefix]: Finished finitePrefix Result has 71 conditions, 64 events. 6/64 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 5. Compared 107 event pairs, 0 based on Foata normal form. 0/57 useless extension candidates. Maximal degree in co-relation 48. Up to 2 conditions per place. [2020-10-21 23:38:21,094 INFO L116 LiptonReduction]: Number of co-enabled transitions 1272 [2020-10-21 23:38:22,298 WARN L193 SmtUtils]: Spent 110.00 ms on a formula simplification. DAG size of input: 52 DAG size of output: 50 [2020-10-21 23:38:22,713 WARN L193 SmtUtils]: Spent 314.00 ms on a formula simplification. DAG size of input: 91 DAG size of output: 87 [2020-10-21 23:38:22,853 WARN L193 SmtUtils]: Spent 135.00 ms on a formula simplification that was a NOOP. DAG size: 83 [2020-10-21 23:38:22,903 INFO L131 LiptonReduction]: Checked pairs total: 1183 [2020-10-21 23:38:22,903 INFO L133 LiptonReduction]: Total number of compositions: 65 [2020-10-21 23:38:22,915 INFO L100 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 20 places, 16 transitions, 42 flow [2020-10-21 23:38:22,949 INFO L122 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result 44 states. [2020-10-21 23:38:22,952 INFO L276 IsEmpty]: Start isEmpty. Operand 44 states. [2020-10-21 23:38:22,967 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 7 [2020-10-21 23:38:22,968 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:22,969 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1] [2020-10-21 23:38:22,969 INFO L429 AbstractCegarLoop]: === Iteration 1 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:22,976 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:22,976 INFO L82 PathProgramCache]: Analyzing trace with hash -542844556, now seen corresponding path program 1 times [2020-10-21 23:38:23,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:23,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1219199981] [2020-10-21 23:38:23,005 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:23,134 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:23,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:23,244 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1219199981] [2020-10-21 23:38:23,245 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:38:23,246 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2020-10-21 23:38:23,247 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [937317316] [2020-10-21 23:38:23,248 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:23,255 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:23,271 INFO L252 McrAutomatonBuilder]: Finished intersection with 7 states and 6 transitions. [2020-10-21 23:38:23,271 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:23,278 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:38:23,279 INFO L461 AbstractCegarLoop]: Interpolant automaton has 4 states [2020-10-21 23:38:23,280 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:23,295 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2020-10-21 23:38:23,296 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=5, Invalid=7, Unknown=0, NotChecked=0, Total=12 [2020-10-21 23:38:23,298 INFO L87 Difference]: Start difference. First operand 44 states. Second operand 4 states. [2020-10-21 23:38:23,365 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:23,366 INFO L93 Difference]: Finished difference Result 83 states and 212 transitions. [2020-10-21 23:38:23,367 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2020-10-21 23:38:23,368 INFO L78 Accepts]: Start accepts. Automaton has 4 states. Word has length 6 [2020-10-21 23:38:23,369 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:23,386 INFO L225 Difference]: With dead ends: 83 [2020-10-21 23:38:23,387 INFO L226 Difference]: Without dead ends: 54 [2020-10-21 23:38:23,388 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 3 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 3 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=9, Invalid=11, Unknown=0, NotChecked=0, Total=20 [2020-10-21 23:38:23,404 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2020-10-21 23:38:23,424 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 50. [2020-10-21 23:38:23,426 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 50 states. [2020-10-21 23:38:23,427 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 120 transitions. [2020-10-21 23:38:23,429 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 120 transitions. Word has length 6 [2020-10-21 23:38:23,429 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:23,429 INFO L481 AbstractCegarLoop]: Abstraction has 50 states and 120 transitions. [2020-10-21 23:38:23,430 INFO L482 AbstractCegarLoop]: Interpolant automaton has 4 states. [2020-10-21 23:38:23,430 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 120 transitions. [2020-10-21 23:38:23,431 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 23:38:23,431 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:23,431 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:23,431 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2020-10-21 23:38:23,432 INFO L429 AbstractCegarLoop]: === Iteration 2 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:23,432 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:23,432 INFO L82 PathProgramCache]: Analyzing trace with hash -1940739433, now seen corresponding path program 1 times [2020-10-21 23:38:23,435 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:23,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1668132278] [2020-10-21 23:38:23,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:23,462 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:23,544 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:23,545 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1668132278] [2020-10-21 23:38:23,545 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:38:23,546 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 23:38:23,546 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [385121514] [2020-10-21 23:38:23,546 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:23,548 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:23,551 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 16 transitions. [2020-10-21 23:38:23,552 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:23,605 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:38:23,606 INFO L461 AbstractCegarLoop]: Interpolant automaton has 5 states [2020-10-21 23:38:23,606 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:23,607 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2020-10-21 23:38:23,607 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2020-10-21 23:38:23,607 INFO L87 Difference]: Start difference. First operand 50 states and 120 transitions. Second operand 5 states. [2020-10-21 23:38:23,661 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:23,661 INFO L93 Difference]: Finished difference Result 80 states and 186 transitions. [2020-10-21 23:38:23,662 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 23:38:23,662 INFO L78 Accepts]: Start accepts. Automaton has 5 states. Word has length 8 [2020-10-21 23:38:23,662 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:23,664 INFO L225 Difference]: With dead ends: 80 [2020-10-21 23:38:23,664 INFO L226 Difference]: Without dead ends: 75 [2020-10-21 23:38:23,665 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 9 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 5 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 2 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:38:23,666 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 75 states. [2020-10-21 23:38:23,674 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 75 to 55. [2020-10-21 23:38:23,674 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 55 states. [2020-10-21 23:38:23,676 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 55 states to 55 states and 136 transitions. [2020-10-21 23:38:23,676 INFO L78 Accepts]: Start accepts. Automaton has 55 states and 136 transitions. Word has length 8 [2020-10-21 23:38:23,677 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:23,677 INFO L481 AbstractCegarLoop]: Abstraction has 55 states and 136 transitions. [2020-10-21 23:38:23,677 INFO L482 AbstractCegarLoop]: Interpolant automaton has 5 states. [2020-10-21 23:38:23,678 INFO L276 IsEmpty]: Start isEmpty. Operand 55 states and 136 transitions. [2020-10-21 23:38:23,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 9 [2020-10-21 23:38:23,679 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:23,679 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:23,679 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2020-10-21 23:38:23,679 INFO L429 AbstractCegarLoop]: === Iteration 3 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:23,680 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:23,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1981941347, now seen corresponding path program 1 times [2020-10-21 23:38:23,683 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:23,684 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1368534727] [2020-10-21 23:38:23,684 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:23,703 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:23,750 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:23,751 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1368534727] [2020-10-21 23:38:23,751 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:38:23,751 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2020-10-21 23:38:23,752 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [636626125] [2020-10-21 23:38:23,752 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:23,753 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:23,754 INFO L252 McrAutomatonBuilder]: Finished intersection with 11 states and 12 transitions. [2020-10-21 23:38:23,754 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:24,077 WARN L193 SmtUtils]: Spent 321.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:38:24,108 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [551#(and (<= (+ ~i~0 ~j~0) 2) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:38:24,108 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 23:38:24,109 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:24,109 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 23:38:24,109 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=20, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:38:24,110 INFO L87 Difference]: Start difference. First operand 55 states and 136 transitions. Second operand 6 states. [2020-10-21 23:38:24,224 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:24,225 INFO L93 Difference]: Finished difference Result 83 states and 196 transitions. [2020-10-21 23:38:24,225 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2020-10-21 23:38:24,226 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 8 [2020-10-21 23:38:24,226 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:24,227 INFO L225 Difference]: With dead ends: 83 [2020-10-21 23:38:24,227 INFO L226 Difference]: Without dead ends: 77 [2020-10-21 23:38:24,227 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 3 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2020-10-21 23:38:24,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 77 states. [2020-10-21 23:38:24,239 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 77 to 66. [2020-10-21 23:38:24,239 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 66 states. [2020-10-21 23:38:24,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 157 transitions. [2020-10-21 23:38:24,241 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 157 transitions. Word has length 8 [2020-10-21 23:38:24,241 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:24,241 INFO L481 AbstractCegarLoop]: Abstraction has 66 states and 157 transitions. [2020-10-21 23:38:24,241 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 23:38:24,241 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 157 transitions. [2020-10-21 23:38:24,242 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 23:38:24,243 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:24,243 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:24,243 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2020-10-21 23:38:24,243 INFO L429 AbstractCegarLoop]: === Iteration 4 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:24,243 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:24,244 INFO L82 PathProgramCache]: Analyzing trace with hash -33351122, now seen corresponding path program 2 times [2020-10-21 23:38:24,246 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:24,246 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1904778185] [2020-10-21 23:38:24,246 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:24,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:24,326 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1904778185] [2020-10-21 23:38:24,327 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [17825605] [2020-10-21 23:38:24,328 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 [2020-10-21 23:38:24,392 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:38:24,392 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:38:24,394 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 23:38:24,400 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:38:24,479 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:38:24,501 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:24,502 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:38:24,502 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 8 [2020-10-21 23:38:24,502 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1492083930] [2020-10-21 23:38:24,503 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:24,504 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:24,505 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 21 transitions. [2020-10-21 23:38:24,505 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:26,979 WARN L193 SmtUtils]: Spent 2.43 s on a formula simplification. DAG size of input: 25 DAG size of output: 7 [2020-10-21 23:38:27,373 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:38:27,375 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:38:27,376 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 23:38:27,376 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:27,376 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 23:38:27,377 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=63, Unknown=0, NotChecked=0, Total=90 [2020-10-21 23:38:27,377 INFO L87 Difference]: Start difference. First operand 66 states and 157 transitions. Second operand 6 states. [2020-10-21 23:38:27,460 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:27,460 INFO L93 Difference]: Finished difference Result 101 states and 235 transitions. [2020-10-21 23:38:27,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 23:38:27,462 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 9 [2020-10-21 23:38:27,463 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:27,464 INFO L225 Difference]: With dead ends: 101 [2020-10-21 23:38:27,464 INFO L226 Difference]: Without dead ends: 96 [2020-10-21 23:38:27,464 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 21 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 11 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 11 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=54, Invalid=102, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:38:27,466 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2020-10-21 23:38:27,473 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 71. [2020-10-21 23:38:27,473 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 71 states. [2020-10-21 23:38:27,474 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 71 states to 71 states and 173 transitions. [2020-10-21 23:38:27,474 INFO L78 Accepts]: Start accepts. Automaton has 71 states and 173 transitions. Word has length 9 [2020-10-21 23:38:27,474 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:27,474 INFO L481 AbstractCegarLoop]: Abstraction has 71 states and 173 transitions. [2020-10-21 23:38:27,475 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 23:38:27,475 INFO L276 IsEmpty]: Start isEmpty. Operand 71 states and 173 transitions. [2020-10-21 23:38:27,476 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 10 [2020-10-21 23:38:27,476 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:27,476 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:27,678 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3,2 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:38:27,679 INFO L429 AbstractCegarLoop]: === Iteration 5 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:27,679 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:27,680 INFO L82 PathProgramCache]: Analyzing trace with hash -1310611417, now seen corresponding path program 2 times [2020-10-21 23:38:27,682 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:27,682 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2018298769] [2020-10-21 23:38:27,682 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:27,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:27,808 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:27,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2018298769] [2020-10-21 23:38:27,809 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1830510785] [2020-10-21 23:38:27,810 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 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 [2020-10-21 23:38:27,860 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:38:27,862 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:38:27,863 INFO L263 TraceCheckSpWp]: Trace formula consists of 82 conjuncts, 7 conjunts are in the unsatisfiable core [2020-10-21 23:38:27,865 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:38:27,939 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:38:27,968 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:27,968 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:38:27,969 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [4, 4] total 7 [2020-10-21 23:38:27,969 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1962278924] [2020-10-21 23:38:27,971 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:27,971 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:27,973 INFO L252 McrAutomatonBuilder]: Finished intersection with 13 states and 15 transitions. [2020-10-21 23:38:27,973 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:28,370 WARN L193 SmtUtils]: Spent 371.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-10-21 23:38:28,397 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [1088#(and (<= (+ (* 2 ~i~0) ~j~0) 3) (= ULTIMATE.start_main_~condI~0 0)), 1087#(and (<= (+ ~i~0 ~j~0) 3) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:38:28,398 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:38:28,398 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:28,399 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:38:28,399 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=82, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:38:28,399 INFO L87 Difference]: Start difference. First operand 71 states and 173 transitions. Second operand 8 states. [2020-10-21 23:38:28,541 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:28,542 INFO L93 Difference]: Finished difference Result 100 states and 239 transitions. [2020-10-21 23:38:28,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-21 23:38:28,542 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 9 [2020-10-21 23:38:28,542 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:28,544 INFO L225 Difference]: With dead ends: 100 [2020-10-21 23:38:28,544 INFO L226 Difference]: Without dead ends: 94 [2020-10-21 23:38:28,544 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 19 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 23 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:38:28,547 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2020-10-21 23:38:28,558 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 79. [2020-10-21 23:38:28,558 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 79 states. [2020-10-21 23:38:28,561 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 79 states to 79 states and 194 transitions. [2020-10-21 23:38:28,561 INFO L78 Accepts]: Start accepts. Automaton has 79 states and 194 transitions. Word has length 9 [2020-10-21 23:38:28,561 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:28,562 INFO L481 AbstractCegarLoop]: Abstraction has 79 states and 194 transitions. [2020-10-21 23:38:28,562 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:38:28,562 INFO L276 IsEmpty]: Start isEmpty. Operand 79 states and 194 transitions. [2020-10-21 23:38:28,563 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 23:38:28,563 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:28,563 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:28,765 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4,3 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:38:28,766 INFO L429 AbstractCegarLoop]: === Iteration 6 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:28,766 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:28,766 INFO L82 PathProgramCache]: Analyzing trace with hash -1043120626, now seen corresponding path program 1 times [2020-10-21 23:38:28,767 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:28,768 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1647833795] [2020-10-21 23:38:28,768 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:28,783 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:28,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:28,831 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1647833795] [2020-10-21 23:38:28,831 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:38:28,831 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 23:38:28,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [469514318] [2020-10-21 23:38:28,832 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:28,833 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:28,835 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-10-21 23:38:28,835 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:28,911 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:38:28,911 INFO L461 AbstractCegarLoop]: Interpolant automaton has 6 states [2020-10-21 23:38:28,912 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:28,912 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2020-10-21 23:38:28,912 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2020-10-21 23:38:28,912 INFO L87 Difference]: Start difference. First operand 79 states and 194 transitions. Second operand 6 states. [2020-10-21 23:38:28,989 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:28,989 INFO L93 Difference]: Finished difference Result 107 states and 250 transitions. [2020-10-21 23:38:28,989 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2020-10-21 23:38:28,990 INFO L78 Accepts]: Start accepts. Automaton has 6 states. Word has length 10 [2020-10-21 23:38:28,990 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:28,991 INFO L225 Difference]: With dead ends: 107 [2020-10-21 23:38:28,991 INFO L226 Difference]: Without dead ends: 102 [2020-10-21 23:38:28,991 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 11 GetRequests, 4 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=30, Invalid=42, Unknown=0, NotChecked=0, Total=72 [2020-10-21 23:38:28,993 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2020-10-21 23:38:28,998 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2020-10-21 23:38:28,999 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 80 states. [2020-10-21 23:38:28,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 195 transitions. [2020-10-21 23:38:29,000 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 195 transitions. Word has length 10 [2020-10-21 23:38:29,000 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:29,000 INFO L481 AbstractCegarLoop]: Abstraction has 80 states and 195 transitions. [2020-10-21 23:38:29,000 INFO L482 AbstractCegarLoop]: Interpolant automaton has 6 states. [2020-10-21 23:38:29,000 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 195 transitions. [2020-10-21 23:38:29,001 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 23:38:29,001 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:29,001 INFO L422 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:29,002 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2020-10-21 23:38:29,002 INFO L429 AbstractCegarLoop]: === Iteration 7 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:29,002 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:29,002 INFO L82 PathProgramCache]: Analyzing trace with hash -1043091796, now seen corresponding path program 2 times [2020-10-21 23:38:29,004 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:29,004 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [211617526] [2020-10-21 23:38:29,004 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:29,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:29,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:29,070 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [211617526] [2020-10-21 23:38:29,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2020-10-21 23:38:29,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2020-10-21 23:38:29,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1334844832] [2020-10-21 23:38:29,071 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:29,072 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:29,074 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-21 23:38:29,074 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:31,171 WARN L193 SmtUtils]: Spent 2.10 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:38:31,282 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [1640#(and (<= (+ ~i~0 ~j~0) 3) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:38:31,282 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:38:31,282 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:31,283 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:38:31,283 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2020-10-21 23:38:31,283 INFO L87 Difference]: Start difference. First operand 80 states and 195 transitions. Second operand 7 states. [2020-10-21 23:38:31,401 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:31,401 INFO L93 Difference]: Finished difference Result 113 states and 262 transitions. [2020-10-21 23:38:31,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2020-10-21 23:38:31,402 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-21 23:38:31,402 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:31,403 INFO L225 Difference]: With dead ends: 113 [2020-10-21 23:38:31,404 INFO L226 Difference]: Without dead ends: 108 [2020-10-21 23:38:31,404 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 16 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 9 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 9 ImplicationChecksByTransitivity, 0.0s TimeCoverageRelationStatistics Valid=42, Invalid=68, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:38:31,406 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 108 states. [2020-10-21 23:38:31,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 108 to 82. [2020-10-21 23:38:31,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 82 states. [2020-10-21 23:38:31,423 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 82 states to 82 states and 194 transitions. [2020-10-21 23:38:31,423 INFO L78 Accepts]: Start accepts. Automaton has 82 states and 194 transitions. Word has length 10 [2020-10-21 23:38:31,423 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:31,423 INFO L481 AbstractCegarLoop]: Abstraction has 82 states and 194 transitions. [2020-10-21 23:38:31,423 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:38:31,424 INFO L276 IsEmpty]: Start isEmpty. Operand 82 states and 194 transitions. [2020-10-21 23:38:31,427 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 23:38:31,427 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:31,427 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:31,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2020-10-21 23:38:31,427 INFO L429 AbstractCegarLoop]: === Iteration 8 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:31,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:31,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1033855625, now seen corresponding path program 3 times [2020-10-21 23:38:31,436 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:31,436 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2121372614] [2020-10-21 23:38:31,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:31,460 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:31,541 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:31,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2121372614] [2020-10-21 23:38:31,542 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1630923814] [2020-10-21 23:38:31,542 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 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 [2020-10-21 23:38:31,592 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 23:38:31,592 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:38:31,593 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:38:31,594 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:38:31,688 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:38:31,721 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:31,721 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:38:31,721 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 10 [2020-10-21 23:38:31,722 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1293951444] [2020-10-21 23:38:31,722 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:31,723 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:31,725 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 26 transitions. [2020-10-21 23:38:31,725 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:36,929 WARN L193 SmtUtils]: Spent 5.17 s on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2020-10-21 23:38:40,097 WARN L193 SmtUtils]: Spent 3.15 s on a formula simplification. DAG size of input: 37 DAG size of output: 7 [2020-10-21 23:38:42,522 WARN L193 SmtUtils]: Spent 2.42 s on a formula simplification. DAG size of input: 25 DAG size of output: 7 [2020-10-21 23:38:46,657 WARN L193 SmtUtils]: Spent 4.13 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:38:46,658 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:38:46,658 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:38:46,658 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:46,658 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:38:46,658 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-21 23:38:46,659 INFO L87 Difference]: Start difference. First operand 82 states and 194 transitions. Second operand 7 states. [2020-10-21 23:38:46,764 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:46,765 INFO L93 Difference]: Finished difference Result 122 states and 284 transitions. [2020-10-21 23:38:46,765 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:38:46,765 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 10 [2020-10-21 23:38:46,766 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:46,768 INFO L225 Difference]: With dead ends: 122 [2020-10-21 23:38:46,768 INFO L226 Difference]: Without dead ends: 117 [2020-10-21 23:38:46,768 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 12 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 19 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=80, Invalid=160, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:38:46,769 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 117 states. [2020-10-21 23:38:46,774 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 117 to 88. [2020-10-21 23:38:46,774 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 88 states. [2020-10-21 23:38:46,775 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 215 transitions. [2020-10-21 23:38:46,775 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 215 transitions. Word has length 10 [2020-10-21 23:38:46,775 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:46,775 INFO L481 AbstractCegarLoop]: Abstraction has 88 states and 215 transitions. [2020-10-21 23:38:46,776 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:38:46,776 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 215 transitions. [2020-10-21 23:38:46,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 11 [2020-10-21 23:38:46,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:46,777 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:46,992 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,4 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:38:46,993 INFO L429 AbstractCegarLoop]: === Iteration 9 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:46,994 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:46,994 INFO L82 PathProgramCache]: Analyzing trace with hash -1974220067, now seen corresponding path program 3 times [2020-10-21 23:38:46,995 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:46,995 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1202062724] [2020-10-21 23:38:46,996 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:47,016 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:47,087 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:47,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1202062724] [2020-10-21 23:38:47,088 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1904283414] [2020-10-21 23:38:47,088 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 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 [2020-10-21 23:38:47,147 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 23:38:47,147 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:38:47,148 INFO L263 TraceCheckSpWp]: Trace formula consists of 87 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:38:47,150 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:38:47,246 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:38:47,261 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:47,261 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:38:47,262 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 23:38:47,262 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1639638597] [2020-10-21 23:38:47,263 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:47,264 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:47,267 INFO L252 McrAutomatonBuilder]: Finished intersection with 15 states and 18 transitions. [2020-10-21 23:38:47,267 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:49,339 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:38:51,412 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 23 [2020-10-21 23:38:51,465 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [2309#(and (<= (+ ~i~0 ~j~0) 4) (= ULTIMATE.start_main_~condI~0 0)), 2310#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 2 ~i~0) ~j~0) 4)), 2311#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 3 ~i~0) ~j~0) 4))] [2020-10-21 23:38:51,466 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:38:51,466 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:51,466 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:38:51,467 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:38:51,467 INFO L87 Difference]: Start difference. First operand 88 states and 215 transitions. Second operand 10 states. [2020-10-21 23:38:51,643 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:51,647 INFO L93 Difference]: Finished difference Result 121 states and 288 transitions. [2020-10-21 23:38:51,647 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 23:38:51,648 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 10 [2020-10-21 23:38:51,648 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:51,649 INFO L225 Difference]: With dead ends: 121 [2020-10-21 23:38:51,649 INFO L226 Difference]: Without dead ends: 115 [2020-10-21 23:38:51,649 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 42 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=92, Invalid=250, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:38:51,650 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 115 states. [2020-10-21 23:38:51,658 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 115 to 94. [2020-10-21 23:38:51,658 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 23:38:51,659 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 23:38:51,659 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 10 [2020-10-21 23:38:51,659 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:51,659 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 23:38:51,659 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:38:51,659 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 23:38:51,664 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:38:51,664 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:51,664 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:51,878 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,5 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:38:51,879 INFO L429 AbstractCegarLoop]: === Iteration 10 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:51,880 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:51,880 INFO L82 PathProgramCache]: Analyzing trace with hash 2022998328, now seen corresponding path program 3 times [2020-10-21 23:38:51,882 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:51,882 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643262558] [2020-10-21 23:38:51,882 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:51,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:51,941 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:51,941 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643262558] [2020-10-21 23:38:51,942 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1975772586] [2020-10-21 23:38:51,942 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 [2020-10-21 23:38:51,986 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 23:38:51,986 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:38:51,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:38:51,990 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:38:52,051 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:38:52,060 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:52,061 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:38:52,061 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 23:38:52,061 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1996285786] [2020-10-21 23:38:52,061 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:52,062 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:52,065 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-21 23:38:52,065 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:38:59,062 WARN L193 SmtUtils]: Spent 6.98 s on a formula simplification. DAG size of input: 40 DAG size of output: 7 [2020-10-21 23:38:59,101 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:38:59,102 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:38:59,102 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:38:59,102 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:38:59,103 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:38:59,103 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 7 states. [2020-10-21 23:38:59,237 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:38:59,237 INFO L93 Difference]: Finished difference Result 121 states and 289 transitions. [2020-10-21 23:38:59,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:38:59,238 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-21 23:38:59,238 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:38:59,240 INFO L225 Difference]: With dead ends: 121 [2020-10-21 23:38:59,240 INFO L226 Difference]: Without dead ends: 116 [2020-10-21 23:38:59,240 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 25 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=71, Invalid=139, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:38:59,242 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2020-10-21 23:38:59,246 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 94. [2020-10-21 23:38:59,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 94 states. [2020-10-21 23:38:59,247 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 232 transitions. [2020-10-21 23:38:59,247 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 232 transitions. Word has length 11 [2020-10-21 23:38:59,248 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:38:59,248 INFO L481 AbstractCegarLoop]: Abstraction has 94 states and 232 transitions. [2020-10-21 23:38:59,248 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:38:59,248 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 232 transitions. [2020-10-21 23:38:59,249 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:38:59,249 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:38:59,249 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:38:59,464 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 6 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable9 [2020-10-21 23:38:59,465 INFO L429 AbstractCegarLoop]: === Iteration 11 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:38:59,465 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:38:59,466 INFO L82 PathProgramCache]: Analyzing trace with hash 2023027158, now seen corresponding path program 4 times [2020-10-21 23:38:59,467 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:38:59,468 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1246568487] [2020-10-21 23:38:59,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:38:59,478 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:38:59,532 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:59,532 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1246568487] [2020-10-21 23:38:59,533 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [816781766] [2020-10-21 23:38:59,533 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 7 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:38:59,596 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:38:59,596 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:38:59,597 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:38:59,598 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:38:59,668 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:38:59,678 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:38:59,678 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:38:59,678 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 23:38:59,679 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [19427053] [2020-10-21 23:38:59,679 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:38:59,680 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:38:59,682 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-21 23:38:59,682 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:01,782 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:39:01,827 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [3030#(and (<= (+ ~i~0 ~j~0) 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:39:01,828 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:01,828 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:01,828 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:01,829 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=92, Unknown=0, NotChecked=0, Total=132 [2020-10-21 23:39:01,829 INFO L87 Difference]: Start difference. First operand 94 states and 232 transitions. Second operand 8 states. [2020-10-21 23:39:01,988 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:01,988 INFO L93 Difference]: Finished difference Result 123 states and 295 transitions. [2020-10-21 23:39:01,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:39:01,989 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 23:39:01,989 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:01,990 INFO L225 Difference]: With dead ends: 123 [2020-10-21 23:39:01,990 INFO L226 Difference]: Without dead ends: 118 [2020-10-21 23:39:01,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 43 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=89, Invalid=183, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:39:01,991 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2020-10-21 23:39:01,995 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 95. [2020-10-21 23:39:01,995 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 23:39:01,996 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 237 transitions. [2020-10-21 23:39:01,996 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 237 transitions. Word has length 11 [2020-10-21 23:39:01,996 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:01,996 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 237 transitions. [2020-10-21 23:39:01,997 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:01,997 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 237 transitions. [2020-10-21 23:39:01,997 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:39:01,998 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:01,998 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:02,211 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10,7 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:02,212 INFO L429 AbstractCegarLoop]: === Iteration 12 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:02,212 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:02,213 INFO L82 PathProgramCache]: Analyzing trace with hash 2023028119, now seen corresponding path program 5 times [2020-10-21 23:39:02,214 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:02,215 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [453810146] [2020-10-21 23:39:02,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:02,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:02,273 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:02,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [453810146] [2020-10-21 23:39:02,274 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459693605] [2020-10-21 23:39:02,274 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 8 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:02,325 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:39:02,325 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:02,326 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:39:02,327 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:02,413 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:02,421 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:02,422 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:02,422 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 23:39:02,422 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [444862387] [2020-10-21 23:39:02,423 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:02,424 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:02,425 INFO L252 McrAutomatonBuilder]: Finished intersection with 16 states and 19 transitions. [2020-10-21 23:39:02,426 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:02,478 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:02,478 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:39:02,478 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:02,479 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:39:02,479 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=74, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:39:02,479 INFO L87 Difference]: Start difference. First operand 95 states and 237 transitions. Second operand 7 states. [2020-10-21 23:39:02,588 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:02,588 INFO L93 Difference]: Finished difference Result 126 states and 297 transitions. [2020-10-21 23:39:02,588 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:39:02,589 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-21 23:39:02,589 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:02,590 INFO L225 Difference]: With dead ends: 126 [2020-10-21 23:39:02,590 INFO L226 Difference]: Without dead ends: 121 [2020-10-21 23:39:02,591 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 35 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=81, Invalid=159, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:39:02,592 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 121 states. [2020-10-21 23:39:02,595 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 121 to 95. [2020-10-21 23:39:02,595 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 95 states. [2020-10-21 23:39:02,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 95 states to 95 states and 233 transitions. [2020-10-21 23:39:02,596 INFO L78 Accepts]: Start accepts. Automaton has 95 states and 233 transitions. Word has length 11 [2020-10-21 23:39:02,596 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:02,596 INFO L481 AbstractCegarLoop]: Abstraction has 95 states and 233 transitions. [2020-10-21 23:39:02,596 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:39:02,597 INFO L276 IsEmpty]: Start isEmpty. Operand 95 states and 233 transitions. [2020-10-21 23:39:02,597 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:39:02,597 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:02,597 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:02,798 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,8 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:02,798 INFO L429 AbstractCegarLoop]: === Iteration 13 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:02,798 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:02,799 INFO L82 PathProgramCache]: Analyzing trace with hash 2023920888, now seen corresponding path program 6 times [2020-10-21 23:39:02,799 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:02,800 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1088385878] [2020-10-21 23:39:02,800 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:02,809 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:02,857 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:02,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1088385878] [2020-10-21 23:39:02,858 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1742923039] [2020-10-21 23:39:02,858 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 9 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:02,923 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 23:39:02,923 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:02,924 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:39:02,925 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:02,989 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:03,011 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:03,012 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:03,012 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 23:39:03,012 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1234943018] [2020-10-21 23:39:03,012 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:03,013 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:03,015 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 29 transitions. [2020-10-21 23:39:03,016 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:03,154 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:39:03,155 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:39:03,214 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [3762#(and (<= (+ ~i~0 ~j~0) 5) (= ULTIMATE.start_main_~condI~0 0)), 3763#(and (<= (+ (* 2 ~i~0) ~j~0) 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:39:03,214 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:39:03,214 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:03,215 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:39:03,215 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=116, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:39:03,215 INFO L87 Difference]: Start difference. First operand 95 states and 233 transitions. Second operand 9 states. [2020-10-21 23:39:03,411 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:03,412 INFO L93 Difference]: Finished difference Result 140 states and 330 transitions. [2020-10-21 23:39:03,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:03,412 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 11 [2020-10-21 23:39:03,412 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:03,413 INFO L225 Difference]: With dead ends: 140 [2020-10-21 23:39:03,414 INFO L226 Difference]: Without dead ends: 135 [2020-10-21 23:39:03,414 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 77 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=110, Invalid=270, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:39:03,415 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 135 states. [2020-10-21 23:39:03,418 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 135 to 98. [2020-10-21 23:39:03,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 23:39:03,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 242 transitions. [2020-10-21 23:39:03,419 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 242 transitions. Word has length 11 [2020-10-21 23:39:03,420 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:03,420 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 242 transitions. [2020-10-21 23:39:03,420 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:39:03,420 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 242 transitions. [2020-10-21 23:39:03,420 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:39:03,421 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:03,421 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:03,631 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2020-10-21 23:39:03,632 INFO L429 AbstractCegarLoop]: === Iteration 14 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:03,632 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:03,633 INFO L82 PathProgramCache]: Analyzing trace with hash 2023921849, now seen corresponding path program 7 times [2020-10-21 23:39:03,634 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:03,634 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1725914645] [2020-10-21 23:39:03,634 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:03,643 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:03,690 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:03,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1725914645] [2020-10-21 23:39:03,691 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [408249539] [2020-10-21 23:39:03,691 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 10 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:03,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:03,761 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:39:03,762 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:03,823 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:03,831 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:03,832 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:03,832 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 23:39:03,832 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1928493943] [2020-10-21 23:39:03,833 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:03,858 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:03,860 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 23 transitions. [2020-10-21 23:39:03,860 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:04,472 WARN L193 SmtUtils]: Spent 578.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:39:04,496 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:04,497 INFO L461 AbstractCegarLoop]: Interpolant automaton has 7 states [2020-10-21 23:39:04,497 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:04,497 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2020-10-21 23:39:04,498 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=72, Unknown=0, NotChecked=0, Total=110 [2020-10-21 23:39:04,498 INFO L87 Difference]: Start difference. First operand 98 states and 242 transitions. Second operand 7 states. [2020-10-21 23:39:04,623 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:04,623 INFO L93 Difference]: Finished difference Result 141 states and 331 transitions. [2020-10-21 23:39:04,623 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2020-10-21 23:39:04,624 INFO L78 Accepts]: Start accepts. Automaton has 7 states. Word has length 11 [2020-10-21 23:39:04,624 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:04,626 INFO L225 Difference]: With dead ends: 141 [2020-10-21 23:39:04,626 INFO L226 Difference]: Without dead ends: 136 [2020-10-21 23:39:04,627 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=84, Invalid=156, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:39:04,627 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-21 23:39:04,630 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 97. [2020-10-21 23:39:04,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 97 states. [2020-10-21 23:39:04,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 97 states to 97 states and 237 transitions. [2020-10-21 23:39:04,631 INFO L78 Accepts]: Start accepts. Automaton has 97 states and 237 transitions. Word has length 11 [2020-10-21 23:39:04,632 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:04,632 INFO L481 AbstractCegarLoop]: Abstraction has 97 states and 237 transitions. [2020-10-21 23:39:04,632 INFO L482 AbstractCegarLoop]: Interpolant automaton has 7 states. [2020-10-21 23:39:04,632 INFO L276 IsEmpty]: Start isEmpty. Operand 97 states and 237 transitions. [2020-10-21 23:39:04,632 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:39:04,633 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:04,633 INFO L422 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:04,845 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13,10 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:04,846 INFO L429 AbstractCegarLoop]: === Iteration 15 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:04,846 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:04,846 INFO L82 PathProgramCache]: Analyzing trace with hash 2023950679, now seen corresponding path program 8 times [2020-10-21 23:39:04,848 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:04,849 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1776043927] [2020-10-21 23:39:04,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:04,857 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:04,903 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:04,903 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1776043927] [2020-10-21 23:39:04,904 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [872230889] [2020-10-21 23:39:04,904 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 11 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:04,956 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:39:04,956 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:04,957 INFO L263 TraceCheckSpWp]: Trace formula consists of 93 conjuncts, 8 conjunts are in the unsatisfiable core [2020-10-21 23:39:04,958 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:05,025 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:05,069 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:05,070 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:05,070 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [5, 5] total 9 [2020-10-21 23:39:05,071 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1887171729] [2020-10-21 23:39:05,071 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:05,072 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:05,073 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 33 transitions. [2020-10-21 23:39:05,074 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:07,267 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:39:07,291 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [4541#(and (<= (+ ~i~0 ~j~0) 4) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:39:07,292 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:07,292 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:07,292 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:07,293 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=94, Unknown=0, NotChecked=0, Total=132 [2020-10-21 23:39:07,293 INFO L87 Difference]: Start difference. First operand 97 states and 237 transitions. Second operand 8 states. [2020-10-21 23:39:07,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:07,451 INFO L93 Difference]: Finished difference Result 141 states and 327 transitions. [2020-10-21 23:39:07,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2020-10-21 23:39:07,452 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 23:39:07,453 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:07,453 INFO L225 Difference]: With dead ends: 141 [2020-10-21 23:39:07,454 INFO L226 Difference]: Without dead ends: 136 [2020-10-21 23:39:07,454 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 0.1s TimeCoverageRelationStatistics Valid=85, Invalid=187, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:39:07,455 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2020-10-21 23:39:07,457 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 98. [2020-10-21 23:39:07,458 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 98 states. [2020-10-21 23:39:07,458 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 231 transitions. [2020-10-21 23:39:07,458 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 231 transitions. Word has length 11 [2020-10-21 23:39:07,459 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:07,459 INFO L481 AbstractCegarLoop]: Abstraction has 98 states and 231 transitions. [2020-10-21 23:39:07,459 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:07,459 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 231 transitions. [2020-10-21 23:39:07,460 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:39:07,460 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:07,460 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:07,672 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2020-10-21 23:39:07,673 INFO L429 AbstractCegarLoop]: === Iteration 16 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:07,673 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:07,674 INFO L82 PathProgramCache]: Analyzing trace with hash -1984724146, now seen corresponding path program 4 times [2020-10-21 23:39:07,675 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:07,675 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1303065168] [2020-10-21 23:39:07,676 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:07,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:07,767 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:07,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1303065168] [2020-10-21 23:39:07,767 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [156094701] [2020-10-21 23:39:07,768 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 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 [2020-10-21 23:39:07,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:39:07,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:07,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:07,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:07,912 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:07,932 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:07,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:07,933 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 23:39:07,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [971864655] [2020-10-21 23:39:07,933 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:07,934 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:07,936 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 31 transitions. [2020-10-21 23:39:07,936 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:11,210 WARN L193 SmtUtils]: Spent 3.26 s on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2020-10-21 23:39:13,278 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 27 DAG size of output: 9 [2020-10-21 23:39:15,548 WARN L193 SmtUtils]: Spent 2.24 s on a formula simplification. DAG size of input: 37 DAG size of output: 7 [2020-10-21 23:39:17,628 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:39:17,638 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:17,639 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:17,639 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:17,639 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:17,639 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=131, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:39:17,640 INFO L87 Difference]: Start difference. First operand 98 states and 231 transitions. Second operand 8 states. [2020-10-21 23:39:17,766 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:17,767 INFO L93 Difference]: Finished difference Result 143 states and 333 transitions. [2020-10-21 23:39:17,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:17,768 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 11 [2020-10-21 23:39:17,768 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:17,769 INFO L225 Difference]: With dead ends: 143 [2020-10-21 23:39:17,769 INFO L226 Difference]: Without dead ends: 138 [2020-10-21 23:39:17,769 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 14 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 29 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=111, Invalid=231, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:39:17,770 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 138 states. [2020-10-21 23:39:17,773 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 138 to 105. [2020-10-21 23:39:17,773 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 105 states. [2020-10-21 23:39:17,774 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 105 states to 105 states and 257 transitions. [2020-10-21 23:39:17,774 INFO L78 Accepts]: Start accepts. Automaton has 105 states and 257 transitions. Word has length 11 [2020-10-21 23:39:17,774 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:17,774 INFO L481 AbstractCegarLoop]: Abstraction has 105 states and 257 transitions. [2020-10-21 23:39:17,774 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:17,776 INFO L276 IsEmpty]: Start isEmpty. Operand 105 states and 257 transitions. [2020-10-21 23:39:17,777 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 12 [2020-10-21 23:39:17,777 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:17,777 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:17,987 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable15 [2020-10-21 23:39:17,987 INFO L429 AbstractCegarLoop]: === Iteration 17 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:17,988 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:17,988 INFO L82 PathProgramCache]: Analyzing trace with hash -1071251737, now seen corresponding path program 4 times [2020-10-21 23:39:17,989 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:17,989 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702855001] [2020-10-21 23:39:17,989 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:17,996 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:18,052 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:18,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702855001] [2020-10-21 23:39:18,053 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1004048586] [2020-10-21 23:39:18,053 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 13 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:18,097 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:39:18,098 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:18,098 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:18,099 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:18,188 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:18,204 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:18,204 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:18,204 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:18,205 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [31573768] [2020-10-21 23:39:18,205 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:18,206 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:18,207 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 21 transitions. [2020-10-21 23:39:18,207 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:20,286 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 23 [2020-10-21 23:39:20,369 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [5339#(and (<= (+ ~i~0 ~j~0) 5) (= ULTIMATE.start_main_~condI~0 0)), 5340#(and (<= (+ (* 2 ~i~0) ~j~0) 5) (= ULTIMATE.start_main_~condI~0 0)), 5341#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 3 ~i~0) ~j~0) 5)), 5342#(and (<= (+ (* 4 ~i~0) ~j~0) 5) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:39:20,369 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 23:39:20,369 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:20,370 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 23:39:20,370 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=216, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:39:20,370 INFO L87 Difference]: Start difference. First operand 105 states and 257 transitions. Second operand 12 states. [2020-10-21 23:39:20,636 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:20,636 INFO L93 Difference]: Finished difference Result 149 states and 354 transitions. [2020-10-21 23:39:20,637 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:39:20,637 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 11 [2020-10-21 23:39:20,637 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:20,638 INFO L225 Difference]: With dead ends: 149 [2020-10-21 23:39:20,638 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 23:39:20,641 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 75 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:39:20,642 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 23:39:20,644 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 113. [2020-10-21 23:39:20,644 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 23:39:20,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-21 23:39:20,645 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 11 [2020-10-21 23:39:20,645 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:20,645 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-21 23:39:20,646 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 23:39:20,646 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-21 23:39:20,646 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:20,646 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:20,646 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:20,851 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 13 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2020-10-21 23:39:20,852 INFO L429 AbstractCegarLoop]: === Iteration 18 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:20,852 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:20,852 INFO L82 PathProgramCache]: Analyzing trace with hash -1711561906, now seen corresponding path program 9 times [2020-10-21 23:39:20,854 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:20,854 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [392517179] [2020-10-21 23:39:20,854 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:20,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:20,924 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:20,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [392517179] [2020-10-21 23:39:20,925 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [606134525] [2020-10-21 23:39:20,925 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 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 [2020-10-21 23:39:20,990 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 23:39:20,991 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:20,992 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:20,993 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:21,075 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:21,088 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:21,088 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:21,088 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:21,089 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1676657158] [2020-10-21 23:39:21,089 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:21,090 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:21,093 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-10-21 23:39:21,093 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:21,203 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:21,203 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:21,203 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:21,203 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:21,204 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:39:21,204 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 8 states. [2020-10-21 23:39:21,364 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:21,364 INFO L93 Difference]: Finished difference Result 152 states and 363 transitions. [2020-10-21 23:39:21,365 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:21,365 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 23:39:21,365 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:21,366 INFO L225 Difference]: With dead ends: 152 [2020-10-21 23:39:21,366 INFO L226 Difference]: Without dead ends: 147 [2020-10-21 23:39:21,366 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=100, Invalid=206, Unknown=0, NotChecked=0, Total=306 [2020-10-21 23:39:21,367 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 147 states. [2020-10-21 23:39:21,370 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 147 to 112. [2020-10-21 23:39:21,370 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 23:39:21,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 277 transitions. [2020-10-21 23:39:21,371 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 277 transitions. Word has length 12 [2020-10-21 23:39:21,371 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:21,371 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 277 transitions. [2020-10-21 23:39:21,371 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:21,371 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 277 transitions. [2020-10-21 23:39:21,372 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:21,372 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:21,372 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:21,581 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2020-10-21 23:39:21,581 INFO L429 AbstractCegarLoop]: === Iteration 19 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:21,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:21,582 INFO L82 PathProgramCache]: Analyzing trace with hash -1711533076, now seen corresponding path program 10 times [2020-10-21 23:39:21,583 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:21,583 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [97049711] [2020-10-21 23:39:21,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:21,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:21,655 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:21,655 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [97049711] [2020-10-21 23:39:21,656 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1417944798] [2020-10-21 23:39:21,656 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 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 [2020-10-21 23:39:21,727 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:39:21,728 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:21,728 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:21,729 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:21,842 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:23,097 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:23,098 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:23,098 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2020-10-21 23:39:23,098 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2018522251] [2020-10-21 23:39:23,098 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:23,099 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:23,102 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-10-21 23:39:23,102 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:23,476 WARN L193 SmtUtils]: Spent 373.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:39:23,556 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [6211#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ ~i~0 ~j~0) 7))] [2020-10-21 23:39:23,557 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:39:23,557 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:23,557 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:39:23,557 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=58, Invalid=151, Unknown=1, NotChecked=0, Total=210 [2020-10-21 23:39:23,558 INFO L87 Difference]: Start difference. First operand 112 states and 277 transitions. Second operand 9 states. [2020-10-21 23:39:30,187 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:30,187 INFO L93 Difference]: Finished difference Result 156 states and 370 transitions. [2020-10-21 23:39:30,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:30,188 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 23:39:30,188 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:30,189 INFO L225 Difference]: With dead ends: 156 [2020-10-21 23:39:30,189 INFO L226 Difference]: Without dead ends: 151 [2020-10-21 23:39:30,190 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 7.8s TimeCoverageRelationStatistics Valid=128, Invalid=287, Unknown=5, NotChecked=0, Total=420 [2020-10-21 23:39:30,191 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 151 states. [2020-10-21 23:39:30,194 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 151 to 112. [2020-10-21 23:39:30,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 23:39:30,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 279 transitions. [2020-10-21 23:39:30,195 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 279 transitions. Word has length 12 [2020-10-21 23:39:30,196 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:30,196 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 279 transitions. [2020-10-21 23:39:30,196 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:39:30,196 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 279 transitions. [2020-10-21 23:39:30,196 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:30,197 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:30,197 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:30,409 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,15 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:30,410 INFO L429 AbstractCegarLoop]: === Iteration 20 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:30,410 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:30,410 INFO L82 PathProgramCache]: Analyzing trace with hash -1711532115, now seen corresponding path program 11 times [2020-10-21 23:39:30,411 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:30,411 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1839753640] [2020-10-21 23:39:30,412 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:30,420 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:30,476 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:30,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1839753640] [2020-10-21 23:39:30,477 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1142776941] [2020-10-21 23:39:30,477 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 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 [2020-10-21 23:39:30,526 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:39:30,526 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:30,529 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:30,530 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:30,616 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:30,626 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:30,627 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:30,627 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:30,627 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [454167189] [2020-10-21 23:39:30,627 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:30,628 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:30,629 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-10-21 23:39:30,630 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:33,955 WARN L193 SmtUtils]: Spent 3.31 s on a formula simplification. DAG size of input: 40 DAG size of output: 7 [2020-10-21 23:39:34,003 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:34,003 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:34,004 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:34,004 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:34,004 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=107, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:39:34,004 INFO L87 Difference]: Start difference. First operand 112 states and 279 transitions. Second operand 8 states. [2020-10-21 23:39:34,167 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:34,168 INFO L93 Difference]: Finished difference Result 148 states and 355 transitions. [2020-10-21 23:39:34,172 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:34,172 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 23:39:34,172 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:34,173 INFO L225 Difference]: With dead ends: 148 [2020-10-21 23:39:34,173 INFO L226 Difference]: Without dead ends: 143 [2020-10-21 23:39:34,174 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=112, Invalid=230, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:39:34,174 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 143 states. [2020-10-21 23:39:34,177 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 143 to 111. [2020-10-21 23:39:34,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 111 states. [2020-10-21 23:39:34,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 111 states to 111 states and 274 transitions. [2020-10-21 23:39:34,178 INFO L78 Accepts]: Start accepts. Automaton has 111 states and 274 transitions. Word has length 12 [2020-10-21 23:39:34,178 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:34,178 INFO L481 AbstractCegarLoop]: Abstraction has 111 states and 274 transitions. [2020-10-21 23:39:34,178 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:34,178 INFO L276 IsEmpty]: Start isEmpty. Operand 111 states and 274 transitions. [2020-10-21 23:39:34,179 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:34,179 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:34,179 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:34,390 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19,16 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:34,391 INFO L429 AbstractCegarLoop]: === Iteration 21 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:34,391 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:34,391 INFO L82 PathProgramCache]: Analyzing trace with hash -1710639346, now seen corresponding path program 12 times [2020-10-21 23:39:34,393 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:34,393 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1840590822] [2020-10-21 23:39:34,393 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:34,403 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:34,461 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:34,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1840590822] [2020-10-21 23:39:34,462 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [660930590] [2020-10-21 23:39:34,462 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 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 [2020-10-21 23:39:34,515 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 23:39:34,516 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:34,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:34,519 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:34,602 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:34,613 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:34,613 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:34,614 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:34,614 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [188644937] [2020-10-21 23:39:34,614 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:34,615 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:34,616 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-10-21 23:39:34,616 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:34,987 WARN L193 SmtUtils]: Spent 370.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:39:35,435 WARN L193 SmtUtils]: Spent 368.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-10-21 23:39:35,462 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [7078#(and (<= (+ ~i~0 ~j~0) 8) (= ULTIMATE.start_main_~condI~0 0)), 7079#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 2 ~i~0) ~j~0) 8))] [2020-10-21 23:39:35,462 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:39:35,462 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:35,463 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:39:35,463 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=155, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:39:35,465 INFO L87 Difference]: Start difference. First operand 111 states and 274 transitions. Second operand 10 states. [2020-10-21 23:39:35,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:35,678 INFO L93 Difference]: Finished difference Result 154 states and 369 transitions. [2020-10-21 23:39:35,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:35,678 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-10-21 23:39:35,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:35,680 INFO L225 Difference]: With dead ends: 154 [2020-10-21 23:39:35,680 INFO L226 Difference]: Without dead ends: 149 [2020-10-21 23:39:35,681 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=138, Invalid=324, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:39:35,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 149 states. [2020-10-21 23:39:35,684 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 149 to 114. [2020-10-21 23:39:35,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 23:39:35,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 287 transitions. [2020-10-21 23:39:35,684 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 287 transitions. Word has length 12 [2020-10-21 23:39:35,685 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:35,685 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 287 transitions. [2020-10-21 23:39:35,685 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:39:35,685 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 287 transitions. [2020-10-21 23:39:35,686 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:35,686 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:35,686 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:35,897 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,17 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:35,898 INFO L429 AbstractCegarLoop]: === Iteration 22 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:35,898 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:35,898 INFO L82 PathProgramCache]: Analyzing trace with hash -1710638385, now seen corresponding path program 13 times [2020-10-21 23:39:35,900 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:35,900 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [821683582] [2020-10-21 23:39:35,900 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:35,911 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:35,971 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:35,971 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [821683582] [2020-10-21 23:39:35,972 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [878267392] [2020-10-21 23:39:35,972 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 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 [2020-10-21 23:39:36,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:36,029 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:36,030 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:36,097 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:36,110 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:36,110 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:36,110 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:36,111 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [337943510] [2020-10-21 23:39:36,111 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:36,114 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:36,116 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-10-21 23:39:36,116 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:39,133 WARN L193 SmtUtils]: Spent 3.01 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:39:39,153 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:39,154 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:39,154 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:39,154 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:39,155 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:39:39,155 INFO L87 Difference]: Start difference. First operand 114 states and 287 transitions. Second operand 8 states. [2020-10-21 23:39:39,355 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:39,355 INFO L93 Difference]: Finished difference Result 146 states and 353 transitions. [2020-10-21 23:39:39,356 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:39,356 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 23:39:39,356 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:39,358 INFO L225 Difference]: With dead ends: 146 [2020-10-21 23:39:39,358 INFO L226 Difference]: Without dead ends: 141 [2020-10-21 23:39:39,358 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=126, Invalid=254, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:39:39,359 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 141 states. [2020-10-21 23:39:39,361 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 141 to 113. [2020-10-21 23:39:39,362 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 23:39:39,362 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 282 transitions. [2020-10-21 23:39:39,362 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 282 transitions. Word has length 12 [2020-10-21 23:39:39,363 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:39,363 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 282 transitions. [2020-10-21 23:39:39,363 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:39,363 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 282 transitions. [2020-10-21 23:39:39,363 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:39,364 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:39,364 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:39,573 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 18 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable21 [2020-10-21 23:39:39,574 INFO L429 AbstractCegarLoop]: === Iteration 23 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:39,574 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:39,574 INFO L82 PathProgramCache]: Analyzing trace with hash -1710609555, now seen corresponding path program 14 times [2020-10-21 23:39:39,576 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:39,576 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [942807472] [2020-10-21 23:39:39,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:39,584 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:39,647 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:39,647 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [942807472] [2020-10-21 23:39:39,648 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1602302987] [2020-10-21 23:39:39,648 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 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 [2020-10-21 23:39:39,704 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:39:39,705 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:39,705 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:39,707 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:39,787 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:39,832 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:39,833 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:39,833 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:39,833 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [526858481] [2020-10-21 23:39:39,834 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:39,835 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:39,837 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 22 transitions. [2020-10-21 23:39:39,837 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:41,903 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:39:41,978 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [7954#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ ~i~0 ~j~0) 7))] [2020-10-21 23:39:41,978 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:39:41,978 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:41,979 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:39:41,979 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=130, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:39:41,979 INFO L87 Difference]: Start difference. First operand 113 states and 282 transitions. Second operand 9 states. [2020-10-21 23:39:42,203 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:42,203 INFO L93 Difference]: Finished difference Result 149 states and 359 transitions. [2020-10-21 23:39:42,204 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:42,204 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 23:39:42,204 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:42,206 INFO L225 Difference]: With dead ends: 149 [2020-10-21 23:39:42,206 INFO L226 Difference]: Without dead ends: 144 [2020-10-21 23:39:42,207 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 78 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=131, Invalid=289, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:39:42,208 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-21 23:39:42,211 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 113. [2020-10-21 23:39:42,212 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 113 states. [2020-10-21 23:39:42,212 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 113 states to 113 states and 284 transitions. [2020-10-21 23:39:42,213 INFO L78 Accepts]: Start accepts. Automaton has 113 states and 284 transitions. Word has length 12 [2020-10-21 23:39:42,213 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:42,213 INFO L481 AbstractCegarLoop]: Abstraction has 113 states and 284 transitions. [2020-10-21 23:39:42,213 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:39:42,213 INFO L276 IsEmpty]: Start isEmpty. Operand 113 states and 284 transitions. [2020-10-21 23:39:42,214 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:42,214 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:42,214 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:42,427 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 19 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2020-10-21 23:39:42,428 INFO L429 AbstractCegarLoop]: === Iteration 24 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:42,428 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:42,428 INFO L82 PathProgramCache]: Analyzing trace with hash -1710608594, now seen corresponding path program 15 times [2020-10-21 23:39:42,430 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:42,431 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532323119] [2020-10-21 23:39:42,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:42,439 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:42,525 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:42,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532323119] [2020-10-21 23:39:42,526 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1233983932] [2020-10-21 23:39:42,526 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 23:39:42,582 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 23:39:42,582 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:42,583 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:42,584 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:42,656 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:42,669 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:42,670 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:42,670 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:42,670 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1900754066] [2020-10-21 23:39:42,670 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:42,672 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:42,673 INFO L252 McrAutomatonBuilder]: Finished intersection with 17 states and 20 transitions. [2020-10-21 23:39:42,673 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:42,729 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:42,729 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:42,729 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:42,729 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:42,730 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=108, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:39:42,730 INFO L87 Difference]: Start difference. First operand 113 states and 284 transitions. Second operand 8 states. [2020-10-21 23:39:42,918 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:42,918 INFO L93 Difference]: Finished difference Result 149 states and 352 transitions. [2020-10-21 23:39:42,919 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:42,919 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 23:39:42,919 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:42,920 INFO L225 Difference]: With dead ends: 149 [2020-10-21 23:39:42,920 INFO L226 Difference]: Without dead ends: 144 [2020-10-21 23:39:42,921 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=122, Invalid=258, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:39:42,921 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 144 states. [2020-10-21 23:39:42,923 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 144 to 112. [2020-10-21 23:39:42,924 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 112 states. [2020-10-21 23:39:42,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 112 states to 112 states and 275 transitions. [2020-10-21 23:39:42,924 INFO L78 Accepts]: Start accepts. Automaton has 112 states and 275 transitions. Word has length 12 [2020-10-21 23:39:42,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:42,925 INFO L481 AbstractCegarLoop]: Abstraction has 112 states and 275 transitions. [2020-10-21 23:39:42,925 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:42,925 INFO L276 IsEmpty]: Start isEmpty. Operand 112 states and 275 transitions. [2020-10-21 23:39:42,925 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:42,925 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:42,925 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:43,126 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable23 [2020-10-21 23:39:43,126 INFO L429 AbstractCegarLoop]: === Iteration 25 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:43,126 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:43,127 INFO L82 PathProgramCache]: Analyzing trace with hash -1682933716, now seen corresponding path program 16 times [2020-10-21 23:39:43,128 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:43,128 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [979862300] [2020-10-21 23:39:43,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:43,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:43,189 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:43,189 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [979862300] [2020-10-21 23:39:43,190 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [854791684] [2020-10-21 23:39:43,190 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 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 [2020-10-21 23:39:43,248 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:39:43,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:43,249 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:43,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:43,341 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:43,352 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:43,353 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:43,353 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:43,353 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1254625716] [2020-10-21 23:39:43,353 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:43,354 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:43,357 INFO L252 McrAutomatonBuilder]: Finished intersection with 23 states and 32 transitions. [2020-10-21 23:39:43,357 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:44,329 WARN L193 SmtUtils]: Spent 947.00 ms on a formula simplification that was a NOOP. DAG size: 23 [2020-10-21 23:39:44,438 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:39:44,438 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:39:44,517 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [8823#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ ~i~0 ~j~0) 7)), 8824#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 2 ~i~0) ~j~0) 7)), 8825#(and (<= (+ (* 3 ~i~0) ~j~0) 7) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:39:44,518 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:39:44,518 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:44,518 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:39:44,518 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=186, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:39:44,518 INFO L87 Difference]: Start difference. First operand 112 states and 275 transitions. Second operand 11 states. [2020-10-21 23:39:44,814 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:44,814 INFO L93 Difference]: Finished difference Result 174 states and 410 transitions. [2020-10-21 23:39:44,815 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2020-10-21 23:39:44,815 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 12 [2020-10-21 23:39:44,815 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:44,817 INFO L225 Difference]: With dead ends: 174 [2020-10-21 23:39:44,817 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 23:39:44,818 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 153 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=172, Invalid=478, Unknown=0, NotChecked=0, Total=650 [2020-10-21 23:39:44,818 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 23:39:44,821 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 118. [2020-10-21 23:39:44,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-21 23:39:44,822 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 295 transitions. [2020-10-21 23:39:44,822 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 295 transitions. Word has length 12 [2020-10-21 23:39:44,822 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:44,822 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 295 transitions. [2020-10-21 23:39:44,822 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:39:44,822 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 295 transitions. [2020-10-21 23:39:44,823 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:44,823 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:44,823 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:45,033 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable24 [2020-10-21 23:39:45,034 INFO L429 AbstractCegarLoop]: === Iteration 26 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:45,034 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:45,034 INFO L82 PathProgramCache]: Analyzing trace with hash -1682932755, now seen corresponding path program 17 times [2020-10-21 23:39:45,036 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:45,036 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051130951] [2020-10-21 23:39:45,036 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:45,044 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:45,100 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:45,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051130951] [2020-10-21 23:39:45,101 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [654887755] [2020-10-21 23:39:45,101 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 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 [2020-10-21 23:39:45,144 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 23:39:45,144 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:45,145 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:45,146 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:45,247 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:45,256 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:45,257 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:45,257 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:45,257 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1398650679] [2020-10-21 23:39:45,257 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:45,259 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:45,260 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-10-21 23:39:45,260 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:47,519 WARN L193 SmtUtils]: Spent 2.20 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:39:47,519 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:47,520 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:47,520 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:47,520 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:47,521 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=50, Invalid=106, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:39:47,521 INFO L87 Difference]: Start difference. First operand 118 states and 295 transitions. Second operand 8 states. [2020-10-21 23:39:47,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:47,726 INFO L93 Difference]: Finished difference Result 174 states and 412 transitions. [2020-10-21 23:39:47,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:47,726 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 23:39:47,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:47,727 INFO L225 Difference]: With dead ends: 174 [2020-10-21 23:39:47,727 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 23:39:47,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 67 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=125, Invalid=255, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:39:47,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 23:39:47,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 117. [2020-10-21 23:39:47,731 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 117 states. [2020-10-21 23:39:47,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 117 states to 117 states and 290 transitions. [2020-10-21 23:39:47,732 INFO L78 Accepts]: Start accepts. Automaton has 117 states and 290 transitions. Word has length 12 [2020-10-21 23:39:47,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:47,732 INFO L481 AbstractCegarLoop]: Abstraction has 117 states and 290 transitions. [2020-10-21 23:39:47,732 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:47,733 INFO L276 IsEmpty]: Start isEmpty. Operand 117 states and 290 transitions. [2020-10-21 23:39:47,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:47,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:47,733 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:47,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2020-10-21 23:39:47,946 INFO L429 AbstractCegarLoop]: === Iteration 27 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:47,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:47,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1682903925, now seen corresponding path program 18 times [2020-10-21 23:39:47,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:47,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [154010514] [2020-10-21 23:39:47,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:47,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:48,024 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:48,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [154010514] [2020-10-21 23:39:48,024 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1286208902] [2020-10-21 23:39:48,025 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 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 [2020-10-21 23:39:48,074 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 23:39:48,075 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:48,075 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:48,076 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:48,156 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:48,171 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:48,171 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:48,171 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:48,171 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1225418363] [2020-10-21 23:39:48,172 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:48,173 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:48,175 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 26 transitions. [2020-10-21 23:39:48,175 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:50,262 WARN L193 SmtUtils]: Spent 2.09 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:39:50,350 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [9770#(and (<= (+ ~i~0 ~j~0) 8) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:39:50,350 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:39:50,351 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:50,351 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:39:50,351 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=129, Unknown=0, NotChecked=0, Total=182 [2020-10-21 23:39:50,351 INFO L87 Difference]: Start difference. First operand 117 states and 290 transitions. Second operand 9 states. [2020-10-21 23:39:50,569 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:50,569 INFO L93 Difference]: Finished difference Result 170 states and 401 transitions. [2020-10-21 23:39:50,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:50,570 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 23:39:50,570 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:50,572 INFO L225 Difference]: With dead ends: 170 [2020-10-21 23:39:50,572 INFO L226 Difference]: Without dead ends: 165 [2020-10-21 23:39:50,573 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=132, Invalid=288, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:39:50,574 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-21 23:39:50,576 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 118. [2020-10-21 23:39:50,576 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 118 states. [2020-10-21 23:39:50,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 118 states to 118 states and 295 transitions. [2020-10-21 23:39:50,577 INFO L78 Accepts]: Start accepts. Automaton has 118 states and 295 transitions. Word has length 12 [2020-10-21 23:39:50,577 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:50,577 INFO L481 AbstractCegarLoop]: Abstraction has 118 states and 295 transitions. [2020-10-21 23:39:50,578 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:39:50,578 INFO L276 IsEmpty]: Start isEmpty. Operand 118 states and 295 transitions. [2020-10-21 23:39:50,578 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:50,578 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:50,578 INFO L422 BasicCegarLoop]: trace histogram [3, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:50,783 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26,23 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:39:50,784 INFO L429 AbstractCegarLoop]: === Iteration 28 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:50,784 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:50,784 INFO L82 PathProgramCache]: Analyzing trace with hash -1682902964, now seen corresponding path program 19 times [2020-10-21 23:39:50,786 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:50,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [474763525] [2020-10-21 23:39:50,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:50,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:50,848 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:50,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [474763525] [2020-10-21 23:39:50,848 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1752054476] [2020-10-21 23:39:50,848 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 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 [2020-10-21 23:39:50,892 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:50,893 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:50,894 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:50,983 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:39:50,999 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:51,000 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:51,000 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:51,000 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [743423975] [2020-10-21 23:39:51,000 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:51,001 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:51,003 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-10-21 23:39:51,003 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:53,554 WARN L193 SmtUtils]: Spent 2.49 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:39:53,555 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:39:53,555 INFO L461 AbstractCegarLoop]: Interpolant automaton has 8 states [2020-10-21 23:39:53,555 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:53,555 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2020-10-21 23:39:53,556 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=105, Unknown=0, NotChecked=0, Total=156 [2020-10-21 23:39:53,556 INFO L87 Difference]: Start difference. First operand 118 states and 295 transitions. Second operand 8 states. [2020-10-21 23:39:53,757 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:53,758 INFO L93 Difference]: Finished difference Result 170 states and 403 transitions. [2020-10-21 23:39:53,758 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2020-10-21 23:39:53,758 INFO L78 Accepts]: Start accepts. Automaton has 8 states. Word has length 12 [2020-10-21 23:39:53,759 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:53,760 INFO L225 Difference]: With dead ends: 170 [2020-10-21 23:39:53,760 INFO L226 Difference]: Without dead ends: 165 [2020-10-21 23:39:53,761 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=127, Invalid=253, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:39:53,761 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 165 states. [2020-10-21 23:39:53,764 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 165 to 116. [2020-10-21 23:39:53,764 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 116 states. [2020-10-21 23:39:53,765 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 116 states to 116 states and 285 transitions. [2020-10-21 23:39:53,765 INFO L78 Accepts]: Start accepts. Automaton has 116 states and 285 transitions. Word has length 12 [2020-10-21 23:39:53,765 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:53,765 INFO L481 AbstractCegarLoop]: Abstraction has 116 states and 285 transitions. [2020-10-21 23:39:53,766 INFO L482 AbstractCegarLoop]: Interpolant automaton has 8 states. [2020-10-21 23:39:53,766 INFO L276 IsEmpty]: Start isEmpty. Operand 116 states and 285 transitions. [2020-10-21 23:39:53,766 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:53,766 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:53,766 INFO L422 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:53,977 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 24 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2020-10-21 23:39:53,977 INFO L429 AbstractCegarLoop]: === Iteration 29 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:53,978 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:53,978 INFO L82 PathProgramCache]: Analyzing trace with hash -1682010195, now seen corresponding path program 20 times [2020-10-21 23:39:53,979 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:53,979 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1076975651] [2020-10-21 23:39:53,979 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:53,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:54,044 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:54,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1076975651] [2020-10-21 23:39:54,045 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [327041917] [2020-10-21 23:39:54,045 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 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 [2020-10-21 23:39:54,109 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:39:54,109 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:54,110 INFO L263 TraceCheckSpWp]: Trace formula consists of 98 conjuncts, 9 conjunts are in the unsatisfiable core [2020-10-21 23:39:54,111 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:39:54,190 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:39:54,219 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:54,220 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:39:54,220 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 11 [2020-10-21 23:39:54,220 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1141250601] [2020-10-21 23:39:54,221 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:39:54,222 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:39:54,224 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-10-21 23:39:54,224 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:39:56,588 WARN L193 SmtUtils]: Spent 2.27 s on a formula simplification. DAG size of input: 39 DAG size of output: 7 [2020-10-21 23:39:59,057 WARN L193 SmtUtils]: Spent 2.45 s on a formula simplification. DAG size of input: 25 DAG size of output: 7 [2020-10-21 23:39:59,289 WARN L193 SmtUtils]: Spent 230.00 ms on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:39:59,317 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [10699#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ ~i~0 ~j~0) 7)), 10700#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 2 ~i~0) ~j~0) 7))] [2020-10-21 23:39:59,317 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:39:59,317 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:39:59,318 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:39:59,318 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=157, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:39:59,318 INFO L87 Difference]: Start difference. First operand 116 states and 285 transitions. Second operand 10 states. [2020-10-21 23:39:59,564 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:39:59,564 INFO L93 Difference]: Finished difference Result 183 states and 422 transitions. [2020-10-21 23:39:59,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:39:59,564 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 12 [2020-10-21 23:39:59,565 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:39:59,566 INFO L225 Difference]: With dead ends: 183 [2020-10-21 23:39:59,566 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 23:39:59,566 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 15 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=145, Invalid=361, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:39:59,567 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 23:39:59,569 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 114. [2020-10-21 23:39:59,570 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 114 states. [2020-10-21 23:39:59,570 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 114 states to 114 states and 268 transitions. [2020-10-21 23:39:59,570 INFO L78 Accepts]: Start accepts. Automaton has 114 states and 268 transitions. Word has length 12 [2020-10-21 23:39:59,571 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:39:59,571 INFO L481 AbstractCegarLoop]: Abstraction has 114 states and 268 transitions. [2020-10-21 23:39:59,571 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:39:59,571 INFO L276 IsEmpty]: Start isEmpty. Operand 114 states and 268 transitions. [2020-10-21 23:39:59,571 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:39:59,571 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:39:59,572 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:39:59,782 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2020-10-21 23:39:59,783 INFO L429 AbstractCegarLoop]: === Iteration 30 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:39:59,783 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:39:59,783 INFO L82 PathProgramCache]: Analyzing trace with hash -1396877225, now seen corresponding path program 5 times [2020-10-21 23:39:59,785 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:39:59,786 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [783960245] [2020-10-21 23:39:59,786 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:39:59,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:39:59,865 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:39:59,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [783960245] [2020-10-21 23:39:59,866 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1672132785] [2020-10-21 23:39:59,866 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 23:39:59,929 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 23:39:59,929 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:39:59,930 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:39:59,930 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:40:00,060 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:40:00,085 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:00,085 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:40:00,085 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 23:40:00,086 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1289787397] [2020-10-21 23:40:00,086 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:40:00,087 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:40:00,090 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 36 transitions. [2020-10-21 23:40:00,090 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:40:05,135 WARN L193 SmtUtils]: Spent 5.01 s on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2020-10-21 23:40:07,206 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 27 DAG size of output: 9 [2020-10-21 23:40:13,348 WARN L193 SmtUtils]: Spent 6.13 s on a formula simplification. DAG size of input: 39 DAG size of output: 9 [2020-10-21 23:40:15,842 WARN L193 SmtUtils]: Spent 2.46 s on a formula simplification. DAG size of input: 25 DAG size of output: 7 [2020-10-21 23:40:15,868 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:40:15,868 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:40:15,868 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:40:15,868 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:40:15,869 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=66, Invalid=174, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:40:15,869 INFO L87 Difference]: Start difference. First operand 114 states and 268 transitions. Second operand 9 states. [2020-10-21 23:40:15,998 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:40:15,998 INFO L93 Difference]: Finished difference Result 164 states and 382 transitions. [2020-10-21 23:40:15,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:40:15,999 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 12 [2020-10-21 23:40:15,999 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:40:16,000 INFO L225 Difference]: With dead ends: 164 [2020-10-21 23:40:16,000 INFO L226 Difference]: Without dead ends: 159 [2020-10-21 23:40:16,001 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 16 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 41 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=147, Invalid=315, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:40:16,002 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 159 states. [2020-10-21 23:40:16,004 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 159 to 122. [2020-10-21 23:40:16,005 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 122 states. [2020-10-21 23:40:16,005 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 299 transitions. [2020-10-21 23:40:16,005 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 299 transitions. Word has length 12 [2020-10-21 23:40:16,006 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:40:16,006 INFO L481 AbstractCegarLoop]: Abstraction has 122 states and 299 transitions. [2020-10-21 23:40:16,006 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:40:16,006 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 299 transitions. [2020-10-21 23:40:16,006 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 13 [2020-10-21 23:40:16,006 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:40:16,007 INFO L422 BasicCegarLoop]: trace histogram [5, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:40:16,218 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,26 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:40:16,218 INFO L429 AbstractCegarLoop]: === Iteration 31 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:40:16,219 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:40:16,219 INFO L82 PathProgramCache]: Analyzing trace with hash 1150962717, now seen corresponding path program 5 times [2020-10-21 23:40:16,220 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:40:16,220 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [844373125] [2020-10-21 23:40:16,221 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:40:16,228 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:40:16,305 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:16,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [844373125] [2020-10-21 23:40:16,306 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2110128267] [2020-10-21 23:40:16,306 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) Waiting until toolchain timeout for monitored process 27 with z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:40:16,363 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 23:40:16,363 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:40:16,364 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:40:16,364 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:40:16,504 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:40:16,516 INFO L134 CoverageAnalysis]: Checked inductivity of 10 backedges. 0 proven. 10 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:16,517 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:40:16,517 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:40:16,517 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [58676892] [2020-10-21 23:40:16,517 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:40:16,518 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:40:16,520 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 24 transitions. [2020-10-21 23:40:16,520 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:40:16,662 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 5 new interpolants: [11648#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 4 ~i~0) ~j~0) 6)), 11649#(and (<= (+ (* 5 ~i~0) ~j~0) 6) (= ULTIMATE.start_main_~condI~0 0)), 11645#(and (<= (+ ~i~0 ~j~0) 6) (= ULTIMATE.start_main_~condI~0 0)), 11646#(and (<= (+ (* 2 ~i~0) ~j~0) 6) (= ULTIMATE.start_main_~condI~0 0)), 11647#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 3 ~i~0) ~j~0) 6))] [2020-10-21 23:40:16,663 INFO L461 AbstractCegarLoop]: Interpolant automaton has 14 states [2020-10-21 23:40:16,663 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:40:16,663 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2020-10-21 23:40:16,664 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=73, Invalid=307, Unknown=0, NotChecked=0, Total=380 [2020-10-21 23:40:16,664 INFO L87 Difference]: Start difference. First operand 122 states and 299 transitions. Second operand 14 states. [2020-10-21 23:40:16,986 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:40:16,987 INFO L93 Difference]: Finished difference Result 175 states and 416 transitions. [2020-10-21 23:40:16,987 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2020-10-21 23:40:16,987 INFO L78 Accepts]: Start accepts. Automaton has 14 states. Word has length 12 [2020-10-21 23:40:16,987 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:40:16,989 INFO L225 Difference]: With dead ends: 175 [2020-10-21 23:40:16,989 INFO L226 Difference]: Without dead ends: 169 [2020-10-21 23:40:16,990 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 5 SyntacticMatches, 1 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=182, Invalid=574, Unknown=0, NotChecked=0, Total=756 [2020-10-21 23:40:16,990 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 169 states. [2020-10-21 23:40:16,993 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 169 to 132. [2020-10-21 23:40:16,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 23:40:16,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 23:40:16,994 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 12 [2020-10-21 23:40:16,994 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:40:16,994 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 23:40:16,995 INFO L482 AbstractCegarLoop]: Interpolant automaton has 14 states. [2020-10-21 23:40:16,995 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 23:40:16,995 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:40:16,995 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:40:16,995 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:40:17,197 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30,27 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:40:17,197 INFO L429 AbstractCegarLoop]: === Iteration 32 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:40:17,198 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:40:17,198 INFO L82 PathProgramCache]: Analyzing trace with hash -1518812168, now seen corresponding path program 21 times [2020-10-21 23:40:17,199 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:40:17,200 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2132833251] [2020-10-21 23:40:17,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:40:17,206 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:40:17,278 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:17,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2132833251] [2020-10-21 23:40:17,278 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [40016339] [2020-10-21 23:40:17,279 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 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 [2020-10-21 23:40:17,333 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 23:40:17,333 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:40:17,334 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:40:17,335 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:40:17,457 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:40:17,468 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:17,469 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:40:17,469 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:40:17,469 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [459412384] [2020-10-21 23:40:17,469 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:40:17,470 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:40:17,472 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-10-21 23:40:17,472 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:40:20,085 WARN L193 SmtUtils]: Spent 2.58 s on a formula simplification. DAG size of input: 42 DAG size of output: 9 [2020-10-21 23:40:23,829 WARN L193 SmtUtils]: Spent 3.74 s on a formula simplification. DAG size of input: 40 DAG size of output: 7 [2020-10-21 23:40:28,527 WARN L193 SmtUtils]: Spent 4.70 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:40:28,544 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:40:28,544 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:40:28,545 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:40:28,545 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:40:28,545 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:40:28,546 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 9 states. [2020-10-21 23:40:28,725 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:40:28,725 INFO L93 Difference]: Finished difference Result 183 states and 437 transitions. [2020-10-21 23:40:28,726 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:40:28,726 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:40:28,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:40:28,728 INFO L225 Difference]: With dead ends: 183 [2020-10-21 23:40:28,728 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 23:40:28,728 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 12 SyntacticMatches, 1 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 51 ImplicationChecksByTransitivity, 0.2s TimeCoverageRelationStatistics Valid=134, Invalid=286, Unknown=0, NotChecked=0, Total=420 [2020-10-21 23:40:28,729 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 23:40:28,731 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 23:40:28,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 23:40:28,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 23:40:28,732 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 23:40:28,732 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:40:28,733 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 23:40:28,733 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:40:28,733 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 23:40:28,733 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:40:28,733 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:40:28,734 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:40:28,945 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable31 [2020-10-21 23:40:28,946 INFO L429 AbstractCegarLoop]: === Iteration 33 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:40:28,946 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:40:28,946 INFO L82 PathProgramCache]: Analyzing trace with hash -1518783338, now seen corresponding path program 22 times [2020-10-21 23:40:28,948 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:40:28,948 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [866361224] [2020-10-21 23:40:28,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:40:28,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:40:29,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:29,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [866361224] [2020-10-21 23:40:29,029 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [410913475] [2020-10-21 23:40:29,029 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 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 [2020-10-21 23:40:29,090 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:40:29,090 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:40:29,091 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:40:29,092 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:40:29,231 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:40:30,487 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:30,487 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:40:30,488 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 23:40:30,488 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [731337904] [2020-10-21 23:40:30,488 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:40:30,490 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:40:30,492 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-10-21 23:40:30,493 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:40:32,621 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:40:32,652 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [12665#(and (<= (+ ~i~0 ~j~0) 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:40:32,652 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:40:32,653 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:40:32,653 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:40:32,653 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=75, Invalid=196, Unknown=1, NotChecked=0, Total=272 [2020-10-21 23:40:32,653 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 10 states. [2020-10-21 23:40:40,106 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:40:40,106 INFO L93 Difference]: Finished difference Result 192 states and 456 transitions. [2020-10-21 23:40:40,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:40:40,107 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 23:40:40,107 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:40:40,109 INFO L225 Difference]: With dead ends: 192 [2020-10-21 23:40:40,109 INFO L226 Difference]: Without dead ends: 187 [2020-10-21 23:40:40,109 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 82 ImplicationChecksByTransitivity, 8.7s TimeCoverageRelationStatistics Valid=168, Invalid=378, Unknown=6, NotChecked=0, Total=552 [2020-10-21 23:40:40,110 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-21 23:40:40,112 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 131. [2020-10-21 23:40:40,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 23:40:40,113 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 329 transitions. [2020-10-21 23:40:40,113 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 329 transitions. Word has length 13 [2020-10-21 23:40:40,113 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:40:40,114 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 329 transitions. [2020-10-21 23:40:40,114 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:40:40,114 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 329 transitions. [2020-10-21 23:40:40,114 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:40:40,114 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:40:40,115 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:40:40,324 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,29 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:40:40,325 INFO L429 AbstractCegarLoop]: === Iteration 34 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:40:40,325 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:40:40,325 INFO L82 PathProgramCache]: Analyzing trace with hash -1518782377, now seen corresponding path program 23 times [2020-10-21 23:40:40,327 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:40:40,327 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305620587] [2020-10-21 23:40:40,327 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:40:40,333 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:40:40,407 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:40,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305620587] [2020-10-21 23:40:40,407 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [32938307] [2020-10-21 23:40:40,407 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 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 [2020-10-21 23:40:40,464 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:40:40,465 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:40:40,466 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:40:40,466 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:40:40,604 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:40:40,622 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:40,622 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:40:40,623 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:40:40,623 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1155157533] [2020-10-21 23:40:40,623 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:40:40,625 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:40:40,629 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:40:40,629 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:40:46,864 WARN L193 SmtUtils]: Spent 6.21 s on a formula simplification. DAG size of input: 42 DAG size of output: 9 [2020-10-21 23:40:46,917 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:40:46,918 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:40:46,918 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:40:46,918 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:40:46,918 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:40:46,919 INFO L87 Difference]: Start difference. First operand 131 states and 329 transitions. Second operand 9 states. [2020-10-21 23:40:47,141 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:40:47,141 INFO L93 Difference]: Finished difference Result 184 states and 441 transitions. [2020-10-21 23:40:47,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:40:47,142 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:40:47,142 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:40:47,143 INFO L225 Difference]: With dead ends: 184 [2020-10-21 23:40:47,144 INFO L226 Difference]: Without dead ends: 179 [2020-10-21 23:40:47,144 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 69 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=148, Invalid=314, Unknown=0, NotChecked=0, Total=462 [2020-10-21 23:40:47,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 179 states. [2020-10-21 23:40:47,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 179 to 129. [2020-10-21 23:40:47,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 23:40:47,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 319 transitions. [2020-10-21 23:40:47,148 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 319 transitions. Word has length 13 [2020-10-21 23:40:47,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:40:47,148 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 319 transitions. [2020-10-21 23:40:47,148 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:40:47,148 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 319 transitions. [2020-10-21 23:40:47,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:40:47,149 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:40:47,149 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:40:47,349 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 30 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2020-10-21 23:40:47,350 INFO L429 AbstractCegarLoop]: === Iteration 35 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:40:47,350 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:40:47,350 INFO L82 PathProgramCache]: Analyzing trace with hash -1517889608, now seen corresponding path program 24 times [2020-10-21 23:40:47,352 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:40:47,352 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1434891702] [2020-10-21 23:40:47,352 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:40:47,359 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:40:47,429 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:47,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1434891702] [2020-10-21 23:40:47,430 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1091688838] [2020-10-21 23:40:47,430 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 23:40:47,496 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 23:40:47,497 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:40:47,498 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:40:47,499 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:40:47,663 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:40:47,700 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:47,700 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:40:47,700 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:40:47,701 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1158293230] [2020-10-21 23:40:47,701 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:40:47,702 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:40:47,705 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-10-21 23:40:47,706 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:40:49,774 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:40:53,868 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 40 DAG size of output: 7 [2020-10-21 23:40:53,924 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [13692#(and (<= (+ ~i~0 ~j~0) 11) (= ULTIMATE.start_main_~condI~0 0)), 13693#(and (<= (+ (* 2 ~i~0) ~j~0) 11) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:40:53,924 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:40:53,925 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:40:53,925 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:40:53,925 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:40:53,926 INFO L87 Difference]: Start difference. First operand 129 states and 319 transitions. Second operand 11 states. [2020-10-21 23:40:54,197 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:40:54,197 INFO L93 Difference]: Finished difference Result 192 states and 456 transitions. [2020-10-21 23:40:54,198 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:40:54,198 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-10-21 23:40:54,198 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:40:54,199 INFO L225 Difference]: With dead ends: 192 [2020-10-21 23:40:54,199 INFO L226 Difference]: Without dead ends: 187 [2020-10-21 23:40:54,200 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 119 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=184, Invalid=416, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:40:54,200 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 187 states. [2020-10-21 23:40:54,202 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 187 to 132. [2020-10-21 23:40:54,203 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 23:40:54,203 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 23:40:54,203 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 23:40:54,203 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:40:54,204 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 23:40:54,204 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:40:54,204 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 23:40:54,204 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:40:54,205 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:40:54,205 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:40:54,414 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34,31 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:40:54,414 INFO L429 AbstractCegarLoop]: === Iteration 36 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:40:54,415 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:40:54,415 INFO L82 PathProgramCache]: Analyzing trace with hash -1517888647, now seen corresponding path program 25 times [2020-10-21 23:40:54,416 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:40:54,416 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1142145138] [2020-10-21 23:40:54,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:40:54,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:40:54,498 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:40:54,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1142145138] [2020-10-21 23:40:54,498 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1806961370] [2020-10-21 23:40:54,498 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 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 [2020-10-21 23:40:54,549 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:40:54,550 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:40:54,551 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:40:56,780 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:41:02,965 WARN L193 SmtUtils]: Spent 4.09 s on a formula simplification. DAG size of input: 43 DAG size of output: 20 [2020-10-21 23:41:02,967 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:02,967 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:41:02,968 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 23:41:02,968 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1811468068] [2020-10-21 23:41:02,968 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:41:02,970 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:41:02,972 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-21 23:41:02,972 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:41:09,721 WARN L193 SmtUtils]: Spent 6.70 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:41:09,745 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:41:09,745 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:41:09,745 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:41:09,746 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:41:09,746 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=168, Unknown=2, NotChecked=0, Total=240 [2020-10-21 23:41:09,746 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 9 states. [2020-10-21 23:41:20,221 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:41:20,221 INFO L93 Difference]: Finished difference Result 183 states and 439 transitions. [2020-10-21 23:41:20,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:41:20,227 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:41:20,227 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:41:20,228 INFO L225 Difference]: With dead ends: 183 [2020-10-21 23:41:20,228 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 23:41:20,229 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 18.8s TimeCoverageRelationStatistics Valid=170, Invalid=375, Unknown=7, NotChecked=0, Total=552 [2020-10-21 23:41:20,229 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 23:41:20,232 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 23:41:20,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 23:41:20,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 327 transitions. [2020-10-21 23:41:20,233 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 327 transitions. Word has length 13 [2020-10-21 23:41:20,233 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:41:20,233 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 327 transitions. [2020-10-21 23:41:20,233 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:41:20,233 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 327 transitions. [2020-10-21 23:41:20,234 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:41:20,234 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:41:20,234 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:41:20,435 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable35 [2020-10-21 23:41:20,436 INFO L429 AbstractCegarLoop]: === Iteration 37 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:41:20,436 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:41:20,436 INFO L82 PathProgramCache]: Analyzing trace with hash -1517859817, now seen corresponding path program 26 times [2020-10-21 23:41:20,438 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:41:20,438 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [271345220] [2020-10-21 23:41:20,438 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:41:20,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:41:20,516 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:20,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [271345220] [2020-10-21 23:41:20,516 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1210753830] [2020-10-21 23:41:20,517 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 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 [2020-10-21 23:41:20,578 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:41:20,579 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:41:20,579 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:41:20,580 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:41:20,746 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:41:20,748 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:41:26,930 WARN L193 SmtUtils]: Spent 4.04 s on a formula simplification. DAG size of input: 65 DAG size of output: 33 [2020-10-21 23:41:26,932 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:26,932 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:41:26,932 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 23:41:26,933 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [208433505] [2020-10-21 23:41:26,933 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:41:26,934 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:41:26,936 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:41:26,937 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:41:29,124 WARN L193 SmtUtils]: Spent 2.15 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:41:29,170 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [14731#(and (<= (+ ~i~0 ~j~0) 10) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:41:29,171 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:41:29,171 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:41:29,171 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:41:29,172 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=72, Invalid=199, Unknown=1, NotChecked=0, Total=272 [2020-10-21 23:41:29,172 INFO L87 Difference]: Start difference. First operand 131 states and 327 transitions. Second operand 10 states. [2020-10-21 23:41:39,509 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:41:39,509 INFO L93 Difference]: Finished difference Result 186 states and 445 transitions. [2020-10-21 23:41:39,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:41:39,510 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 23:41:39,510 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:41:39,512 INFO L225 Difference]: With dead ends: 186 [2020-10-21 23:41:39,512 INFO L226 Difference]: Without dead ends: 181 [2020-10-21 23:41:39,512 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 106 ImplicationChecksByTransitivity, 16.5s TimeCoverageRelationStatistics Valid=177, Invalid=417, Unknown=6, NotChecked=0, Total=600 [2020-10-21 23:41:39,513 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 181 states. [2020-10-21 23:41:39,515 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 181 to 130. [2020-10-21 23:41:39,515 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-21 23:41:39,516 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 326 transitions. [2020-10-21 23:41:39,516 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 326 transitions. Word has length 13 [2020-10-21 23:41:39,516 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:41:39,516 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 326 transitions. [2020-10-21 23:41:39,516 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:41:39,517 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 326 transitions. [2020-10-21 23:41:39,517 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:41:39,517 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:41:39,517 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:41:39,727 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2020-10-21 23:41:39,728 INFO L429 AbstractCegarLoop]: === Iteration 38 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:41:39,728 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:41:39,728 INFO L82 PathProgramCache]: Analyzing trace with hash -1517858856, now seen corresponding path program 27 times [2020-10-21 23:41:39,730 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:41:39,730 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058467266] [2020-10-21 23:41:39,730 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:41:39,736 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:41:39,807 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:39,807 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058467266] [2020-10-21 23:41:39,808 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [993461867] [2020-10-21 23:41:39,808 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 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 [2020-10-21 23:41:39,867 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2020-10-21 23:41:39,867 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:41:39,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:41:39,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:41:39,996 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:41:40,007 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:40,008 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:41:40,008 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:41:40,008 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [386112639] [2020-10-21 23:41:40,008 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:41:40,010 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:41:40,012 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-21 23:41:40,012 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:41:47,401 WARN L193 SmtUtils]: Spent 7.37 s on a formula simplification. DAG size of input: 40 DAG size of output: 7 [2020-10-21 23:41:48,040 WARN L193 SmtUtils]: Spent 637.00 ms on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:41:48,064 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:41:48,065 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:41:48,065 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:41:48,065 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:41:48,066 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:41:48,066 INFO L87 Difference]: Start difference. First operand 130 states and 326 transitions. Second operand 9 states. [2020-10-21 23:41:48,330 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:41:48,330 INFO L93 Difference]: Finished difference Result 176 states and 422 transitions. [2020-10-21 23:41:48,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:41:48,331 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:41:48,331 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:41:48,333 INFO L225 Difference]: With dead ends: 176 [2020-10-21 23:41:48,333 INFO L226 Difference]: Without dead ends: 171 [2020-10-21 23:41:48,334 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 10 SyntacticMatches, 1 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 92 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=160, Invalid=346, Unknown=0, NotChecked=0, Total=506 [2020-10-21 23:41:48,334 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-21 23:41:48,337 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 128. [2020-10-21 23:41:48,337 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 128 states. [2020-10-21 23:41:48,338 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 128 states to 128 states and 316 transitions. [2020-10-21 23:41:48,338 INFO L78 Accepts]: Start accepts. Automaton has 128 states and 316 transitions. Word has length 13 [2020-10-21 23:41:48,338 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:41:48,338 INFO L481 AbstractCegarLoop]: Abstraction has 128 states and 316 transitions. [2020-10-21 23:41:48,338 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:41:48,339 INFO L276 IsEmpty]: Start isEmpty. Operand 128 states and 316 transitions. [2020-10-21 23:41:48,339 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:41:48,339 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:41:48,339 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:41:48,549 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2020-10-21 23:41:48,550 INFO L429 AbstractCegarLoop]: === Iteration 39 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:41:48,550 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:41:48,550 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183978, now seen corresponding path program 28 times [2020-10-21 23:41:48,552 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:41:48,552 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1501957251] [2020-10-21 23:41:48,552 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:41:48,558 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:41:48,631 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1501957251] [2020-10-21 23:41:48,632 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1433899761] [2020-10-21 23:41:48,632 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 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 [2020-10-21 23:41:48,689 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:41:48,689 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:41:48,690 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:41:48,691 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:41:48,815 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:41:48,835 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:48,836 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:41:48,836 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:41:48,836 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [323408598] [2020-10-21 23:41:48,836 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:41:48,837 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:41:48,839 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-10-21 23:41:48,840 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:41:48,957 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 3 new interpolants: [15744#(and (<= (+ ~i~0 ~j~0) 11) (= ULTIMATE.start_main_~condI~0 0)), 15745#(and (<= (+ (* 2 ~i~0) ~j~0) 11) (= ULTIMATE.start_main_~condI~0 0)), 15746#(and (<= (+ (* 3 ~i~0) ~j~0) 11) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:41:48,957 INFO L461 AbstractCegarLoop]: Interpolant automaton has 12 states [2020-10-21 23:41:48,958 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:41:48,958 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 12 interpolants. [2020-10-21 23:41:48,958 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=71, Invalid=235, Unknown=0, NotChecked=0, Total=306 [2020-10-21 23:41:48,958 INFO L87 Difference]: Start difference. First operand 128 states and 316 transitions. Second operand 12 states. [2020-10-21 23:41:49,280 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:41:49,281 INFO L93 Difference]: Finished difference Result 185 states and 443 transitions. [2020-10-21 23:41:49,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:41:49,282 INFO L78 Accepts]: Start accepts. Automaton has 12 states. Word has length 13 [2020-10-21 23:41:49,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:41:49,284 INFO L225 Difference]: With dead ends: 185 [2020-10-21 23:41:49,284 INFO L226 Difference]: Without dead ends: 180 [2020-10-21 23:41:49,284 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=195, Invalid=507, Unknown=0, NotChecked=0, Total=702 [2020-10-21 23:41:49,285 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-21 23:41:49,287 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 133. [2020-10-21 23:41:49,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 23:41:49,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 337 transitions. [2020-10-21 23:41:49,288 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 337 transitions. Word has length 13 [2020-10-21 23:41:49,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:41:49,288 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 337 transitions. [2020-10-21 23:41:49,288 INFO L482 AbstractCegarLoop]: Interpolant automaton has 12 states. [2020-10-21 23:41:49,288 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 337 transitions. [2020-10-21 23:41:49,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:41:49,289 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:41:49,289 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:41:49,499 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 35 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2020-10-21 23:41:49,500 INFO L429 AbstractCegarLoop]: === Iteration 40 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:41:49,500 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:41:49,500 INFO L82 PathProgramCache]: Analyzing trace with hash -1490183017, now seen corresponding path program 29 times [2020-10-21 23:41:49,502 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:41:49,502 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49167027] [2020-10-21 23:41:49,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:41:49,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:41:49,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:49,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49167027] [2020-10-21 23:41:49,582 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [354068155] [2020-10-21 23:41:49,582 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 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 [2020-10-21 23:41:49,634 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:41:49,634 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:41:49,635 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:41:49,636 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:41:49,740 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:41:49,752 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:49,752 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:41:49,753 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:41:49,753 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [496811565] [2020-10-21 23:41:49,753 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:41:49,754 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:41:49,756 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-10-21 23:41:49,756 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:41:56,484 WARN L193 SmtUtils]: Spent 6.71 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:41:56,506 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:41:56,507 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:41:56,507 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:41:56,507 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:41:56,508 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:41:56,508 INFO L87 Difference]: Start difference. First operand 133 states and 337 transitions. Second operand 9 states. [2020-10-21 23:41:56,816 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:41:56,816 INFO L93 Difference]: Finished difference Result 180 states and 436 transitions. [2020-10-21 23:41:56,817 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:41:56,817 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:41:56,817 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:41:56,818 INFO L225 Difference]: With dead ends: 180 [2020-10-21 23:41:56,818 INFO L226 Difference]: Without dead ends: 175 [2020-10-21 23:41:56,819 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=176, Invalid=376, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:41:56,819 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 175 states. [2020-10-21 23:41:56,823 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 175 to 132. [2020-10-21 23:41:56,823 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 23:41:56,823 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 23:41:56,823 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 23:41:56,824 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:41:56,824 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 23:41:56,824 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:41:56,824 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 23:41:56,824 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:41:56,824 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:41:56,825 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:41:57,034 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2020-10-21 23:41:57,034 INFO L429 AbstractCegarLoop]: === Iteration 41 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:41:57,035 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:41:57,035 INFO L82 PathProgramCache]: Analyzing trace with hash -1490154187, now seen corresponding path program 30 times [2020-10-21 23:41:57,037 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:41:57,037 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1028851621] [2020-10-21 23:41:57,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:41:57,042 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:41:57,123 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1028851621] [2020-10-21 23:41:57,123 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839521942] [2020-10-21 23:41:57,124 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 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 [2020-10-21 23:41:57,180 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 23:41:57,180 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:41:57,181 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:41:57,181 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:41:57,293 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:41:57,301 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:57,302 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:41:57,302 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:41:57,302 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1723623706] [2020-10-21 23:41:57,302 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:41:57,303 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:41:57,305 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-21 23:41:57,305 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:41:57,403 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [16780#(and (<= (+ ~i~0 ~j~0) 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:41:57,403 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:41:57,403 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:41:57,404 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:41:57,404 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=171, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:41:57,404 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 10 states. [2020-10-21 23:41:57,818 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:41:57,818 INFO L93 Difference]: Finished difference Result 183 states and 442 transitions. [2020-10-21 23:41:57,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:41:57,820 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 23:41:57,820 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:41:57,821 INFO L225 Difference]: With dead ends: 183 [2020-10-21 23:41:57,822 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 23:41:57,822 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 120 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=185, Invalid=415, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:41:57,823 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 23:41:57,827 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 132. [2020-10-21 23:41:57,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 23:41:57,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 334 transitions. [2020-10-21 23:41:57,829 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 334 transitions. Word has length 13 [2020-10-21 23:41:57,829 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:41:57,829 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 334 transitions. [2020-10-21 23:41:57,829 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:41:57,829 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 334 transitions. [2020-10-21 23:41:57,830 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:41:57,830 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:41:57,831 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:41:58,031 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 37 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable40 [2020-10-21 23:41:58,032 INFO L429 AbstractCegarLoop]: === Iteration 42 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:41:58,032 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:41:58,032 INFO L82 PathProgramCache]: Analyzing trace with hash -1490153226, now seen corresponding path program 31 times [2020-10-21 23:41:58,034 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:41:58,034 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1919013449] [2020-10-21 23:41:58,034 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:41:58,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:41:58,167 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:58,167 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1919013449] [2020-10-21 23:41:58,168 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [340285290] [2020-10-21 23:41:58,168 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 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 [2020-10-21 23:41:58,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:41:58,245 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:41:58,247 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:41:58,362 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:41:58,375 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:41:58,375 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:41:58,375 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:41:58,376 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1961029574] [2020-10-21 23:41:58,376 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:41:58,378 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:41:58,380 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-10-21 23:41:58,380 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:03,643 WARN L193 SmtUtils]: Spent 5.25 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:42:03,665 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:42:03,665 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:42:03,665 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:03,666 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:42:03,666 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:42:03,666 INFO L87 Difference]: Start difference. First operand 132 states and 334 transitions. Second operand 9 states. [2020-10-21 23:42:03,947 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:03,947 INFO L93 Difference]: Finished difference Result 175 states and 425 transitions. [2020-10-21 23:42:03,947 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:03,947 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:42:03,947 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:03,948 INFO L225 Difference]: With dead ends: 175 [2020-10-21 23:42:03,948 INFO L226 Difference]: Without dead ends: 170 [2020-10-21 23:42:03,949 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=174, Invalid=378, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:42:03,949 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 170 states. [2020-10-21 23:42:03,951 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 170 to 130. [2020-10-21 23:42:03,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 130 states. [2020-10-21 23:42:03,952 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 130 states to 130 states and 324 transitions. [2020-10-21 23:42:03,952 INFO L78 Accepts]: Start accepts. Automaton has 130 states and 324 transitions. Word has length 13 [2020-10-21 23:42:03,952 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:03,952 INFO L481 AbstractCegarLoop]: Abstraction has 130 states and 324 transitions. [2020-10-21 23:42:03,952 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:42:03,953 INFO L276 IsEmpty]: Start isEmpty. Operand 130 states and 324 transitions. [2020-10-21 23:42:03,953 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:03,953 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:03,953 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:04,157 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2020-10-21 23:42:04,158 INFO L429 AbstractCegarLoop]: === Iteration 43 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:04,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:04,159 INFO L82 PathProgramCache]: Analyzing trace with hash -1489260457, now seen corresponding path program 32 times [2020-10-21 23:42:04,160 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:04,160 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [870359044] [2020-10-21 23:42:04,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:04,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:04,249 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:04,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [870359044] [2020-10-21 23:42:04,250 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1240739705] [2020-10-21 23:42:04,250 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 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 [2020-10-21 23:42:04,315 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:42:04,315 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:04,316 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:04,317 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:04,432 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:42:04,466 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:04,466 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:04,466 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:04,467 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [9362034] [2020-10-21 23:42:04,467 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:04,468 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:04,470 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:42:04,470 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:04,582 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [17801#(and (<= (+ ~i~0 ~j~0) 12) (= ULTIMATE.start_main_~condI~0 0)), 17802#(and (<= (+ (* 2 ~i~0) ~j~0) 12) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:42:04,583 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:42:04,583 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:04,583 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:42:04,583 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:42:04,583 INFO L87 Difference]: Start difference. First operand 130 states and 324 transitions. Second operand 11 states. [2020-10-21 23:42:04,933 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:04,934 INFO L93 Difference]: Finished difference Result 185 states and 445 transitions. [2020-10-21 23:42:04,934 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:04,934 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-10-21 23:42:04,935 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:04,936 INFO L225 Difference]: With dead ends: 185 [2020-10-21 23:42:04,936 INFO L226 Difference]: Without dead ends: 180 [2020-10-21 23:42:04,937 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 138 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=188, Invalid=462, Unknown=0, NotChecked=0, Total=650 [2020-10-21 23:42:04,937 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 180 states. [2020-10-21 23:42:04,940 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 180 to 133. [2020-10-21 23:42:04,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 23:42:04,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 337 transitions. [2020-10-21 23:42:04,941 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 337 transitions. Word has length 13 [2020-10-21 23:42:04,941 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:04,941 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 337 transitions. [2020-10-21 23:42:04,941 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:42:04,942 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 337 transitions. [2020-10-21 23:42:04,942 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:04,942 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:04,942 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:05,143 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,39 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:42:05,143 INFO L429 AbstractCegarLoop]: === Iteration 44 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:05,144 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:05,144 INFO L82 PathProgramCache]: Analyzing trace with hash -1489259496, now seen corresponding path program 33 times [2020-10-21 23:42:05,145 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:05,145 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1621731919] [2020-10-21 23:42:05,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:05,150 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:05,230 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:05,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1621731919] [2020-10-21 23:42:05,231 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1428942807] [2020-10-21 23:42:05,231 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 Starting monitored process 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 [2020-10-21 23:42:05,282 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 23:42:05,283 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:05,284 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 11 conjunts are in the unsatisfiable core [2020-10-21 23:42:05,285 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:05,452 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:42:05,503 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:05,503 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:05,503 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:05,504 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1437619873] [2020-10-21 23:42:05,504 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:05,506 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:05,509 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-10-21 23:42:05,509 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:05,593 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:42:05,593 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:42:05,594 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:05,594 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:42:05,594 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:42:05,595 INFO L87 Difference]: Start difference. First operand 133 states and 337 transitions. Second operand 9 states. [2020-10-21 23:42:05,929 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:05,930 INFO L93 Difference]: Finished difference Result 176 states and 428 transitions. [2020-10-21 23:42:05,930 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:05,930 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:42:05,931 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:05,932 INFO L225 Difference]: With dead ends: 176 [2020-10-21 23:42:05,932 INFO L226 Difference]: Without dead ends: 171 [2020-10-21 23:42:05,932 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 109 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:42:05,933 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 171 states. [2020-10-21 23:42:05,936 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 171 to 132. [2020-10-21 23:42:05,936 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 23:42:05,937 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 332 transitions. [2020-10-21 23:42:05,937 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 332 transitions. Word has length 13 [2020-10-21 23:42:05,937 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:05,937 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 332 transitions. [2020-10-21 23:42:05,937 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:42:05,937 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 332 transitions. [2020-10-21 23:42:05,938 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:05,938 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:05,938 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:06,147 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 40 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2020-10-21 23:42:06,147 INFO L429 AbstractCegarLoop]: === Iteration 45 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:06,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:06,148 INFO L82 PathProgramCache]: Analyzing trace with hash -1489230666, now seen corresponding path program 34 times [2020-10-21 23:42:06,149 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:06,149 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [440068520] [2020-10-21 23:42:06,149 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:06,155 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:06,243 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:06,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [440068520] [2020-10-21 23:42:06,243 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1594263052] [2020-10-21 23:42:06,243 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 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 [2020-10-21 23:42:06,298 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:42:06,299 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:06,299 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:06,300 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:06,410 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:42:06,446 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:06,446 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:06,446 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:06,447 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [302152840] [2020-10-21 23:42:06,447 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:06,448 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:06,450 INFO L252 McrAutomatonBuilder]: Finished intersection with 19 states and 23 transitions. [2020-10-21 23:42:06,450 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:13,269 WARN L193 SmtUtils]: Spent 6.80 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:42:15,322 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:42:15,359 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [18832#(and (<= (+ ~i~0 ~j~0) 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:42:15,360 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:42:15,360 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:15,360 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:42:15,360 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=175, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:42:15,360 INFO L87 Difference]: Start difference. First operand 132 states and 332 transitions. Second operand 10 states. [2020-10-21 23:42:15,703 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:15,703 INFO L93 Difference]: Finished difference Result 183 states and 442 transitions. [2020-10-21 23:42:15,704 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:15,704 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 23:42:15,704 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:15,705 INFO L225 Difference]: With dead ends: 183 [2020-10-21 23:42:15,705 INFO L226 Difference]: Without dead ends: 178 [2020-10-21 23:42:15,706 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=180, Invalid=420, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:42:15,706 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 178 states. [2020-10-21 23:42:15,709 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 178 to 131. [2020-10-21 23:42:15,709 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 131 states. [2020-10-21 23:42:15,709 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 131 states to 131 states and 331 transitions. [2020-10-21 23:42:15,709 INFO L78 Accepts]: Start accepts. Automaton has 131 states and 331 transitions. Word has length 13 [2020-10-21 23:42:15,710 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:15,710 INFO L481 AbstractCegarLoop]: Abstraction has 131 states and 331 transitions. [2020-10-21 23:42:15,710 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:42:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 131 states and 331 transitions. [2020-10-21 23:42:15,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:15,711 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:15,711 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:15,921 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,41 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:42:15,922 INFO L429 AbstractCegarLoop]: === Iteration 46 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:15,922 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:15,922 INFO L82 PathProgramCache]: Analyzing trace with hash -1489229705, now seen corresponding path program 35 times [2020-10-21 23:42:15,924 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:15,924 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [562590332] [2020-10-21 23:42:15,924 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:15,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:16,011 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:16,011 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [562590332] [2020-10-21 23:42:16,012 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [691596054] [2020-10-21 23:42:16,012 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 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 [2020-10-21 23:42:16,073 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 23:42:16,073 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:16,074 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:16,075 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:16,191 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:42:16,202 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:16,202 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:16,203 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:16,203 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1907996166] [2020-10-21 23:42:16,204 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:16,205 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:16,206 INFO L252 McrAutomatonBuilder]: Finished intersection with 18 states and 21 transitions. [2020-10-21 23:42:16,206 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:25,243 WARN L193 SmtUtils]: Spent 9.02 s on a formula simplification. DAG size of input: 37 DAG size of output: 6 [2020-10-21 23:42:25,264 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:42:25,265 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:42:25,265 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:25,265 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:42:25,266 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=61, Invalid=149, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:42:25,266 INFO L87 Difference]: Start difference. First operand 131 states and 331 transitions. Second operand 9 states. [2020-10-21 23:42:25,535 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:25,535 INFO L93 Difference]: Finished difference Result 172 states and 407 transitions. [2020-10-21 23:42:25,536 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:25,536 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:42:25,536 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:25,538 INFO L225 Difference]: With dead ends: 172 [2020-10-21 23:42:25,538 INFO L226 Difference]: Without dead ends: 167 [2020-10-21 23:42:25,538 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 110 ImplicationChecksByTransitivity, 0.3s TimeCoverageRelationStatistics Valid=170, Invalid=382, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:42:25,539 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 167 states. [2020-10-21 23:42:25,542 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 167 to 129. [2020-10-21 23:42:25,542 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 129 states. [2020-10-21 23:42:25,542 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 129 states to 129 states and 317 transitions. [2020-10-21 23:42:25,543 INFO L78 Accepts]: Start accepts. Automaton has 129 states and 317 transitions. Word has length 13 [2020-10-21 23:42:25,543 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:25,543 INFO L481 AbstractCegarLoop]: Abstraction has 129 states and 317 transitions. [2020-10-21 23:42:25,543 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:42:25,543 INFO L276 IsEmpty]: Start isEmpty. Operand 129 states and 317 transitions. [2020-10-21 23:42:25,544 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:25,544 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:25,544 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:25,755 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable45 [2020-10-21 23:42:25,756 INFO L429 AbstractCegarLoop]: === Iteration 47 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:25,756 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:25,756 INFO L82 PathProgramCache]: Analyzing trace with hash -631309448, now seen corresponding path program 36 times [2020-10-21 23:42:25,758 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:25,758 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [213924074] [2020-10-21 23:42:25,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:25,763 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:25,840 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:25,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [213924074] [2020-10-21 23:42:25,841 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [297474842] [2020-10-21 23:42:25,841 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 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 [2020-10-21 23:42:25,907 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2020-10-21 23:42:25,907 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:25,908 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:25,909 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:26,016 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:42:26,028 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:26,029 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:26,029 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:26,029 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1493476486] [2020-10-21 23:42:26,030 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:26,031 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:26,032 INFO L252 McrAutomatonBuilder]: Finished intersection with 25 states and 35 transitions. [2020-10-21 23:42:26,032 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:26,463 WARN L193 SmtUtils]: Spent 385.00 ms on a formula simplification that was a NOOP. DAG size: 25 [2020-10-21 23:42:26,550 INFO L375 QuantifierPusher]: Applying distributivity to a DISJUNCTION[2, 2, 2, 1] term [2020-10-21 23:42:26,551 INFO L603 QuantifierPusher]: Distributing 2 disjuncts over 2 conjuncts [2020-10-21 23:42:26,620 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 4 new interpolants: [19846#(and (<= (+ ~i~0 ~j~0) 9) (= ULTIMATE.start_main_~condI~0 0)), 19847#(and (= ULTIMATE.start_main_~condI~0 0) (<= (+ (* 2 ~i~0) ~j~0) 9)), 19848#(and (<= (+ (* 3 ~i~0) ~j~0) 9) (= ULTIMATE.start_main_~condI~0 0)), 19849#(and (<= (+ (* 4 ~i~0) ~j~0) 9) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:42:26,620 INFO L461 AbstractCegarLoop]: Interpolant automaton has 13 states [2020-10-21 23:42:26,621 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:26,621 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2020-10-21 23:42:26,621 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=69, Invalid=273, Unknown=0, NotChecked=0, Total=342 [2020-10-21 23:42:26,621 INFO L87 Difference]: Start difference. First operand 129 states and 317 transitions. Second operand 13 states. [2020-10-21 23:42:27,058 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:27,059 INFO L93 Difference]: Finished difference Result 208 states and 490 transitions. [2020-10-21 23:42:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2020-10-21 23:42:27,059 INFO L78 Accepts]: Start accepts. Automaton has 13 states. Word has length 13 [2020-10-21 23:42:27,059 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:27,061 INFO L225 Difference]: With dead ends: 208 [2020-10-21 23:42:27,061 INFO L226 Difference]: Without dead ends: 203 [2020-10-21 23:42:27,061 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 11 SyntacticMatches, 2 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 234 ImplicationChecksByTransitivity, 0.5s TimeCoverageRelationStatistics Valid=233, Invalid=697, Unknown=0, NotChecked=0, Total=930 [2020-10-21 23:42:27,062 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 203 states. [2020-10-21 23:42:27,064 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 203 to 135. [2020-10-21 23:42:27,064 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 23:42:27,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 341 transitions. [2020-10-21 23:42:27,064 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 341 transitions. Word has length 13 [2020-10-21 23:42:27,065 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:27,065 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 341 transitions. [2020-10-21 23:42:27,065 INFO L482 AbstractCegarLoop]: Interpolant automaton has 13 states. [2020-10-21 23:42:27,065 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 341 transitions. [2020-10-21 23:42:27,066 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:27,066 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:27,066 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:27,267 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46,43 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:42:27,268 INFO L429 AbstractCegarLoop]: === Iteration 48 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:27,268 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:27,268 INFO L82 PathProgramCache]: Analyzing trace with hash -631308487, now seen corresponding path program 37 times [2020-10-21 23:42:27,270 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:27,270 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [734572662] [2020-10-21 23:42:27,270 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:27,275 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:27,354 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:27,354 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [734572662] [2020-10-21 23:42:27,355 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [612765761] [2020-10-21 23:42:27,355 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 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 [2020-10-21 23:42:27,408 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:27,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:27,410 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:27,515 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:42:27,527 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:27,527 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:27,528 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:27,528 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [763007939] [2020-10-21 23:42:27,528 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:27,530 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:27,531 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:42:27,532 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:27,618 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:42:27,618 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:42:27,618 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:27,619 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:42:27,619 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=147, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:42:27,619 INFO L87 Difference]: Start difference. First operand 135 states and 341 transitions. Second operand 9 states. [2020-10-21 23:42:27,944 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:27,945 INFO L93 Difference]: Finished difference Result 196 states and 473 transitions. [2020-10-21 23:42:27,945 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:27,945 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:42:27,946 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:27,946 INFO L225 Difference]: With dead ends: 196 [2020-10-21 23:42:27,947 INFO L226 Difference]: Without dead ends: 191 [2020-10-21 23:42:27,947 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 107 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=173, Invalid=379, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:42:27,947 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 191 states. [2020-10-21 23:42:27,950 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 191 to 134. [2020-10-21 23:42:27,950 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-21 23:42:27,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 336 transitions. [2020-10-21 23:42:27,951 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 336 transitions. Word has length 13 [2020-10-21 23:42:27,951 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:27,951 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 336 transitions. [2020-10-21 23:42:27,951 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:42:27,951 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 336 transitions. [2020-10-21 23:42:27,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:27,952 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:27,952 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:28,152 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 44 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2020-10-21 23:42:28,153 INFO L429 AbstractCegarLoop]: === Iteration 49 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:28,153 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:28,153 INFO L82 PathProgramCache]: Analyzing trace with hash -631279657, now seen corresponding path program 38 times [2020-10-21 23:42:28,155 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:28,155 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705441571] [2020-10-21 23:42:28,155 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:28,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:28,235 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:28,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705441571] [2020-10-21 23:42:28,235 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [740268420] [2020-10-21 23:42:28,235 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 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 [2020-10-21 23:42:28,280 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:42:28,280 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:28,281 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:28,282 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:28,428 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:42:29,927 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:29,928 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:29,928 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2020-10-21 23:42:29,928 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1664185613] [2020-10-21 23:42:29,928 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:29,930 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:29,931 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-10-21 23:42:29,931 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:32,060 WARN L193 SmtUtils]: Spent 2.06 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:42:34,112 WARN L193 SmtUtils]: Spent 2.05 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:42:34,127 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [20937#(and (<= (+ ~i~0 ~j~0) 12) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:42:34,128 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:42:34,128 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:34,128 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:42:34,129 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=70, Invalid=201, Unknown=1, NotChecked=0, Total=272 [2020-10-21 23:42:34,129 INFO L87 Difference]: Start difference. First operand 134 states and 336 transitions. Second operand 10 states. [2020-10-21 23:42:42,042 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:42,043 INFO L93 Difference]: Finished difference Result 206 states and 494 transitions. [2020-10-21 23:42:42,043 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:42,043 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 23:42:42,043 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:42,045 INFO L225 Difference]: With dead ends: 206 [2020-10-21 23:42:42,045 INFO L226 Difference]: Without dead ends: 201 [2020-10-21 23:42:42,046 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 127 ImplicationChecksByTransitivity, 9.4s TimeCoverageRelationStatistics Valid=187, Invalid=458, Unknown=5, NotChecked=0, Total=650 [2020-10-21 23:42:42,047 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-21 23:42:42,050 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 137. [2020-10-21 23:42:42,050 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 137 states. [2020-10-21 23:42:42,050 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 137 states to 137 states and 349 transitions. [2020-10-21 23:42:42,050 INFO L78 Accepts]: Start accepts. Automaton has 137 states and 349 transitions. Word has length 13 [2020-10-21 23:42:42,051 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:42,051 INFO L481 AbstractCegarLoop]: Abstraction has 137 states and 349 transitions. [2020-10-21 23:42:42,051 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:42:42,051 INFO L276 IsEmpty]: Start isEmpty. Operand 137 states and 349 transitions. [2020-10-21 23:42:42,051 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:42,051 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:42,052 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:42,262 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 45 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2020-10-21 23:42:42,263 INFO L429 AbstractCegarLoop]: === Iteration 50 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:42,263 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:42,263 INFO L82 PathProgramCache]: Analyzing trace with hash -631278696, now seen corresponding path program 39 times [2020-10-21 23:42:42,265 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:42,265 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [744701694] [2020-10-21 23:42:42,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:42,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:42,347 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [744701694] [2020-10-21 23:42:42,348 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1559614779] [2020-10-21 23:42:42,348 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 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 [2020-10-21 23:42:42,394 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2020-10-21 23:42:42,395 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:42,395 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:42,396 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:42,520 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:42:42,530 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:42,531 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:42,531 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:42,531 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [63712485] [2020-10-21 23:42:42,531 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:42,532 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:42,534 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:42:42,534 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:44,767 WARN L193 SmtUtils]: Spent 2.17 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:42:44,768 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:42:44,768 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:42:44,768 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:44,768 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:42:44,769 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=64, Invalid=146, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:42:44,769 INFO L87 Difference]: Start difference. First operand 137 states and 349 transitions. Second operand 9 states. [2020-10-21 23:42:45,090 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:45,090 INFO L93 Difference]: Finished difference Result 206 states and 492 transitions. [2020-10-21 23:42:45,091 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:45,091 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:42:45,091 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:45,093 INFO L225 Difference]: With dead ends: 206 [2020-10-21 23:42:45,093 INFO L226 Difference]: Without dead ends: 201 [2020-10-21 23:42:45,094 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 101 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=175, Invalid=377, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:42:45,094 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 201 states. [2020-10-21 23:42:45,097 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 201 to 135. [2020-10-21 23:42:45,097 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 23:42:45,098 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-21 23:42:45,098 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-21 23:42:45,098 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:45,098 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-21 23:42:45,098 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:42:45,099 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-21 23:42:45,099 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:45,099 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:45,100 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:45,311 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 46 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable49 [2020-10-21 23:42:45,312 INFO L429 AbstractCegarLoop]: === Iteration 51 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:45,312 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:45,312 INFO L82 PathProgramCache]: Analyzing trace with hash -630385927, now seen corresponding path program 40 times [2020-10-21 23:42:45,315 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:45,316 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [779940422] [2020-10-21 23:42:45,316 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:45,321 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:45,415 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:45,415 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [779940422] [2020-10-21 23:42:45,416 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [438149898] [2020-10-21 23:42:45,416 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 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 [2020-10-21 23:42:45,460 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2020-10-21 23:42:45,460 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:45,461 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:45,462 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:45,567 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:42:45,581 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:45,582 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:45,582 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:45,582 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [449088883] [2020-10-21 23:42:45,582 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:45,583 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:45,585 INFO L252 McrAutomatonBuilder]: Finished intersection with 22 states and 29 transitions. [2020-10-21 23:42:45,585 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:47,789 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:42:47,790 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 2 new interpolants: [22032#(and (<= (+ ~i~0 ~j~0) 13) (= ULTIMATE.start_main_~condI~0 0)), 22033#(and (<= (+ (* 2 ~i~0) ~j~0) 13) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:42:47,790 INFO L461 AbstractCegarLoop]: Interpolant automaton has 11 states [2020-10-21 23:42:47,790 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:47,791 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 11 interpolants. [2020-10-21 23:42:47,791 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=204, Unknown=0, NotChecked=0, Total=272 [2020-10-21 23:42:47,791 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 11 states. [2020-10-21 23:42:48,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:48,142 INFO L93 Difference]: Finished difference Result 202 states and 483 transitions. [2020-10-21 23:42:48,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:48,143 INFO L78 Accepts]: Start accepts. Automaton has 11 states. Word has length 13 [2020-10-21 23:42:48,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:48,144 INFO L225 Difference]: With dead ends: 202 [2020-10-21 23:42:48,145 INFO L226 Difference]: Without dead ends: 197 [2020-10-21 23:42:48,145 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 144 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=187, Invalid=463, Unknown=0, NotChecked=0, Total=650 [2020-10-21 23:42:48,146 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 197 states. [2020-10-21 23:42:48,148 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 197 to 134. [2020-10-21 23:42:48,148 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 134 states. [2020-10-21 23:42:48,149 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 134 states to 134 states and 347 transitions. [2020-10-21 23:42:48,149 INFO L78 Accepts]: Start accepts. Automaton has 134 states and 347 transitions. Word has length 13 [2020-10-21 23:42:48,149 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:48,149 INFO L481 AbstractCegarLoop]: Abstraction has 134 states and 347 transitions. [2020-10-21 23:42:48,149 INFO L482 AbstractCegarLoop]: Interpolant automaton has 11 states. [2020-10-21 23:42:48,149 INFO L276 IsEmpty]: Start isEmpty. Operand 134 states and 347 transitions. [2020-10-21 23:42:48,150 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:48,150 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:48,150 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:48,361 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 47 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable50 [2020-10-21 23:42:48,362 INFO L429 AbstractCegarLoop]: === Iteration 52 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:48,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:48,362 INFO L82 PathProgramCache]: Analyzing trace with hash -630384966, now seen corresponding path program 41 times [2020-10-21 23:42:48,364 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:48,364 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1587489281] [2020-10-21 23:42:48,365 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:48,369 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:48,458 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:48,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1587489281] [2020-10-21 23:42:48,458 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [192213168] [2020-10-21 23:42:48,459 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 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 [2020-10-21 23:42:48,502 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2020-10-21 23:42:48,502 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:48,503 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:48,504 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:48,615 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:42:48,626 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:48,626 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:48,626 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:48,626 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1978444939] [2020-10-21 23:42:48,627 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:48,627 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:48,629 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:42:48,629 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:51,360 WARN L193 SmtUtils]: Spent 2.66 s on a formula simplification. DAG size of input: 22 DAG size of output: 6 [2020-10-21 23:42:51,361 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:42:51,361 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:42:51,362 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:51,362 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:42:51,363 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=143, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:42:51,363 INFO L87 Difference]: Start difference. First operand 134 states and 347 transitions. Second operand 9 states. [2020-10-21 23:42:51,718 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:51,719 INFO L93 Difference]: Finished difference Result 203 states and 484 transitions. [2020-10-21 23:42:51,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:51,719 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:42:51,720 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:51,721 INFO L225 Difference]: With dead ends: 203 [2020-10-21 23:42:51,721 INFO L226 Difference]: Without dead ends: 198 [2020-10-21 23:42:51,721 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 104 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=178, Invalid=374, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:42:51,722 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 198 states. [2020-10-21 23:42:51,724 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 198 to 133. [2020-10-21 23:42:51,725 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 133 states. [2020-10-21 23:42:51,725 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 133 states to 133 states and 342 transitions. [2020-10-21 23:42:51,725 INFO L78 Accepts]: Start accepts. Automaton has 133 states and 342 transitions. Word has length 13 [2020-10-21 23:42:51,725 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:51,726 INFO L481 AbstractCegarLoop]: Abstraction has 133 states and 342 transitions. [2020-10-21 23:42:51,726 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:42:51,726 INFO L276 IsEmpty]: Start isEmpty. Operand 133 states and 342 transitions. [2020-10-21 23:42:51,726 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:51,726 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:51,727 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:51,930 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,48 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:42:51,931 INFO L429 AbstractCegarLoop]: === Iteration 53 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:51,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:51,931 INFO L82 PathProgramCache]: Analyzing trace with hash -630356136, now seen corresponding path program 42 times [2020-10-21 23:42:51,933 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:51,933 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1158228044] [2020-10-21 23:42:51,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:51,938 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:52,018 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:52,018 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1158228044] [2020-10-21 23:42:52,019 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [453297868] [2020-10-21 23:42:52,019 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 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 [2020-10-21 23:42:52,066 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2020-10-21 23:42:52,067 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:52,067 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:52,068 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:52,181 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:42:52,222 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:52,222 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:52,223 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:52,223 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [1827513272] [2020-10-21 23:42:52,223 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:52,224 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:52,226 INFO L252 McrAutomatonBuilder]: Finished intersection with 21 states and 27 transitions. [2020-10-21 23:42:52,226 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:52,958 WARN L193 SmtUtils]: Spent 684.00 ms on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:42:53,027 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 1 new interpolants: [23111#(and (<= (+ ~i~0 ~j~0) 11) (= ULTIMATE.start_main_~condI~0 0))] [2020-10-21 23:42:53,028 INFO L461 AbstractCegarLoop]: Interpolant automaton has 10 states [2020-10-21 23:42:53,028 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:53,028 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2020-10-21 23:42:53,028 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=67, Invalid=173, Unknown=0, NotChecked=0, Total=240 [2020-10-21 23:42:53,028 INFO L87 Difference]: Start difference. First operand 133 states and 342 transitions. Second operand 10 states. [2020-10-21 23:42:53,372 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:53,373 INFO L93 Difference]: Finished difference Result 201 states and 477 transitions. [2020-10-21 23:42:53,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:53,373 INFO L78 Accepts]: Start accepts. Automaton has 10 states. Word has length 13 [2020-10-21 23:42:53,374 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:53,375 INFO L225 Difference]: With dead ends: 201 [2020-10-21 23:42:53,375 INFO L226 Difference]: Without dead ends: 196 [2020-10-21 23:42:53,376 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=183, Invalid=417, Unknown=0, NotChecked=0, Total=600 [2020-10-21 23:42:53,376 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 196 states. [2020-10-21 23:42:53,379 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 196 to 135. [2020-10-21 23:42:53,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 135 states. [2020-10-21 23:42:53,379 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 135 states to 135 states and 339 transitions. [2020-10-21 23:42:53,379 INFO L78 Accepts]: Start accepts. Automaton has 135 states and 339 transitions. Word has length 13 [2020-10-21 23:42:53,380 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:53,380 INFO L481 AbstractCegarLoop]: Abstraction has 135 states and 339 transitions. [2020-10-21 23:42:53,380 INFO L482 AbstractCegarLoop]: Interpolant automaton has 10 states. [2020-10-21 23:42:53,380 INFO L276 IsEmpty]: Start isEmpty. Operand 135 states and 339 transitions. [2020-10-21 23:42:53,380 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:53,381 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:53,381 INFO L422 BasicCegarLoop]: trace histogram [4, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:53,582 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,49 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:42:53,582 INFO L429 AbstractCegarLoop]: === Iteration 54 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:53,583 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:53,583 INFO L82 PathProgramCache]: Analyzing trace with hash -630355175, now seen corresponding path program 43 times [2020-10-21 23:42:53,585 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:53,585 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1569093239] [2020-10-21 23:42:53,585 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:53,589 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:53,668 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:53,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1569093239] [2020-10-21 23:42:53,669 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743792445] [2020-10-21 23:42:53,669 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 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 [2020-10-21 23:42:53,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:53,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:53,735 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:53,845 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 2 disjuncts [2020-10-21 23:42:53,854 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:53,855 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:53,855 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:53,855 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [713880699] [2020-10-21 23:42:53,856 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:53,857 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:53,858 INFO L252 McrAutomatonBuilder]: Finished intersection with 20 states and 25 transitions. [2020-10-21 23:42:53,858 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider [2020-10-21 23:42:53,942 INFO L301 McrAutomatonBuilder]: Construction finished. MCR generated 0 new interpolants: [] [2020-10-21 23:42:53,942 INFO L461 AbstractCegarLoop]: Interpolant automaton has 9 states [2020-10-21 23:42:53,943 INFO L142 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2020-10-21 23:42:53,943 INFO L142 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2020-10-21 23:42:53,943 INFO L144 InterpolantAutomaton]: CoverageRelationStatistics Valid=65, Invalid=145, Unknown=0, NotChecked=0, Total=210 [2020-10-21 23:42:53,943 INFO L87 Difference]: Start difference. First operand 135 states and 339 transitions. Second operand 9 states. [2020-10-21 23:42:54,254 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2020-10-21 23:42:54,255 INFO L93 Difference]: Finished difference Result 197 states and 469 transitions. [2020-10-21 23:42:54,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2020-10-21 23:42:54,255 INFO L78 Accepts]: Start accepts. Automaton has 9 states. Word has length 13 [2020-10-21 23:42:54,255 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2020-10-21 23:42:54,256 INFO L225 Difference]: With dead ends: 197 [2020-10-21 23:42:54,256 INFO L226 Difference]: Without dead ends: 192 [2020-10-21 23:42:54,257 INFO L677 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 11 SyntacticMatches, 1 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 0.4s TimeCoverageRelationStatistics Valid=177, Invalid=375, Unknown=0, NotChecked=0, Total=552 [2020-10-21 23:42:54,257 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 192 states. [2020-10-21 23:42:54,260 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 192 to 132. [2020-10-21 23:42:54,261 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 132 states. [2020-10-21 23:42:54,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 132 states to 132 states and 324 transitions. [2020-10-21 23:42:54,261 INFO L78 Accepts]: Start accepts. Automaton has 132 states and 324 transitions. Word has length 13 [2020-10-21 23:42:54,262 INFO L84 Accepts]: Finished accepts. word is rejected. [2020-10-21 23:42:54,262 INFO L481 AbstractCegarLoop]: Abstraction has 132 states and 324 transitions. [2020-10-21 23:42:54,262 INFO L482 AbstractCegarLoop]: Interpolant automaton has 9 states. [2020-10-21 23:42:54,262 INFO L276 IsEmpty]: Start isEmpty. Operand 132 states and 324 transitions. [2020-10-21 23:42:54,262 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2020-10-21 23:42:54,263 INFO L414 BasicCegarLoop]: Found error trace [2020-10-21 23:42:54,263 INFO L422 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1] [2020-10-21 23:42:54,472 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2020-10-21 23:42:54,473 INFO L429 AbstractCegarLoop]: === Iteration 55 === [ULTIMATE.startErr1INUSE_VIOLATION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION]=== [2020-10-21 23:42:54,473 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2020-10-21 23:42:54,473 INFO L82 PathProgramCache]: Analyzing trace with hash -602680297, now seen corresponding path program 44 times [2020-10-21 23:42:54,475 INFO L162 FreeRefinementEngine]: Executing refinement strategy CAMEL [2020-10-21 23:42:54,475 INFO L353 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [113478919] [2020-10-21 23:42:54,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2020-10-21 23:42:54,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2020-10-21 23:42:54,558 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:54,558 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [113478919] [2020-10-21 23:42:54,559 INFO L353 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [839969344] [2020-10-21 23:42:54,559 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 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 [2020-10-21 23:42:54,639 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2020-10-21 23:42:54,640 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2020-10-21 23:42:54,641 INFO L263 TraceCheckSpWp]: Trace formula consists of 103 conjuncts, 10 conjunts are in the unsatisfiable core [2020-10-21 23:42:54,642 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2020-10-21 23:42:54,793 INFO L603 QuantifierPusher]: Distributing 2 conjuncts over 3 disjuncts [2020-10-21 23:42:54,819 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2020-10-21 23:42:54,820 INFO L219 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2020-10-21 23:42:54,820 INFO L232 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2020-10-21 23:42:54,820 INFO L155 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleMcr [2040557349] [2020-10-21 23:42:54,820 INFO L194 McrAutomatonBuilder]: Constructing automaton for MCR equivalence class. [2020-10-21 23:42:54,822 INFO L249 McrAutomatonBuilder]: Started intersection. [2020-10-21 23:42:54,828 INFO L252 McrAutomatonBuilder]: Finished intersection with 27 states and 39 transitions. [2020-10-21 23:42:54,829 INFO L276 McrAutomatonBuilder]: Constructing interpolant automaton by labelling MCR automaton with interpolants from WpInterpolantProvider Received shutdown request... [2020-10-21 23:42:56,906 WARN L193 SmtUtils]: Spent 2.07 s on a formula simplification that was a NOOP. DAG size: 22 [2020-10-21 23:42:57,108 WARN L518 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54,51 z3 -smt2 -in SMTLIB2_COMPLIANT=true [2020-10-21 23:42:57,108 WARN L546 AbstractCegarLoop]: Verification canceled [2020-10-21 23:42:57,113 WARN L235 ceAbstractionStarter]: Timeout [2020-10-21 23:42:57,113 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 21.10 11:42:57 BasicIcfg [2020-10-21 23:42:57,113 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2020-10-21 23:42:57,114 INFO L168 Benchmark]: Toolchain (without parser) took 277426.79 ms. Allocated memory was 138.9 MB in the beginning and 240.1 MB in the end (delta: 101.2 MB). Free memory was 101.0 MB in the beginning and 141.8 MB in the end (delta: -40.8 MB). Peak memory consumption was 60.4 MB. Max. memory is 7.1 GB. [2020-10-21 23:42:57,114 INFO L168 Benchmark]: CDTParser took 3.09 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. [2020-10-21 23:42:57,115 INFO L168 Benchmark]: CACSL2BoogieTranslator took 632.33 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.0 MB in the beginning and 157.5 MB in the end (delta: -57.5 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. [2020-10-21 23:42:57,115 INFO L168 Benchmark]: Boogie Procedure Inliner took 52.01 ms. Allocated memory is still 201.3 MB. Free memory was 157.5 MB in the beginning and 155.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. [2020-10-21 23:42:57,116 INFO L168 Benchmark]: Boogie Preprocessor took 29.67 ms. Allocated memory is still 201.3 MB. Free memory was 155.1 MB in the beginning and 153.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. [2020-10-21 23:42:57,116 INFO L168 Benchmark]: RCFGBuilder took 507.34 ms. Allocated memory is still 201.3 MB. Free memory was 153.7 MB in the beginning and 130.9 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. [2020-10-21 23:42:57,116 INFO L168 Benchmark]: TraceAbstraction took 276195.28 ms. Allocated memory was 201.3 MB in the beginning and 240.1 MB in the end (delta: 38.8 MB). Free memory was 130.9 MB in the beginning and 141.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. [2020-10-21 23:42:57,120 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 3.09 ms. Allocated memory is still 138.9 MB. Free memory was 120.4 MB in the beginning and 120.2 MB in the end (delta: 209.8 kB). Peak memory consumption was 209.8 kB. Max. memory is 7.1 GB. * CACSL2BoogieTranslator took 632.33 ms. Allocated memory was 138.9 MB in the beginning and 201.3 MB in the end (delta: 62.4 MB). Free memory was 100.0 MB in the beginning and 157.5 MB in the end (delta: -57.5 MB). Peak memory consumption was 22.4 MB. Max. memory is 7.1 GB. * Boogie Procedure Inliner took 52.01 ms. Allocated memory is still 201.3 MB. Free memory was 157.5 MB in the beginning and 155.1 MB in the end (delta: 2.4 MB). Peak memory consumption was 2.4 MB. Max. memory is 7.1 GB. * Boogie Preprocessor took 29.67 ms. Allocated memory is still 201.3 MB. Free memory was 155.1 MB in the beginning and 153.7 MB in the end (delta: 1.4 MB). Peak memory consumption was 1.4 MB. Max. memory is 7.1 GB. * RCFGBuilder took 507.34 ms. Allocated memory is still 201.3 MB. Free memory was 153.7 MB in the beginning and 130.9 MB in the end (delta: 22.8 MB). Peak memory consumption was 22.8 MB. Max. memory is 7.1 GB. * TraceAbstraction took 276195.28 ms. Allocated memory was 201.3 MB in the beginning and 240.1 MB in the end (delta: 38.8 MB). Free memory was 130.9 MB in the beginning and 141.8 MB in the end (delta: -10.9 MB). Peak memory consumption was 27.9 MB. Max. memory is 7.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks 710 VarBasedMoverChecksPositive, 10 VarBasedMoverChecksNegative, 0 SemBasedMoverChecksPositive, 0 SemBasedMoverChecksNegative, 0 SemBasedMoverChecksUnknown, SemBasedMoverCheckTime: 0.0s, 19 CheckedPairsTotal, LiptonReductionStatistics: ReductionTime: 1.8s, 67 PlacesBefore, 20 PlacesAfterwards, 66 TransitionsBefore, 16 TransitionsAfterwards, 1272 CoEnabledTransitionPairs, 6 FixpointIterations, 16 TrivialSequentialCompositions, 33 ConcurrentSequentialCompositions, 0 TrivialYvCompositions, 13 ConcurrentYvCompositions, 3 ChoiceCompositions, 65 TotalNumberOfCompositions, 1183 MoverChecksTotal - TimeoutResultAtElement [Line: 12]: Timeout (TraceAbstraction) Unable to prove that call of __VERIFIER_error() unreachable (line 12). Cancelled while BasicCegarLoop was analyzing trace of length 14 with TraceHistMax 3,while QuantifierPusher was running 1 iterations of DualJunctionQuantifierElimination. - StatisticsResult: Ultimate Automizer benchmark data CFG has 3 procedures, 61 locations, 1 error locations. Started 1 CEGAR loops. VerificationResult: TIMEOUT, OverallTime: 276.0s, OverallIterations: 55, TraceHistogramMax: 5, AutomataDifference: 54.0s, DeadEndRemovalTime: 0.0s, HoareAnnotationTime: 0.0s, InitialAbstractionConstructionTime: 1.9s, HoareTripleCheckerStatistics: 702 SDtfs, 3927 SDslu, 3791 SDs, 0 SdLazy, 2824 SolverSat, 709 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 3.0s Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1563 GetRequests, 513 SyntacticMatches, 43 SemanticMatches, 1007 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 4151 ImplicationChecksByTransitivity, 76.1s Time, 0.0s BasicInterpolantAutomatonTime, BiggestAbstraction: size=137occurred in iteration=49, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0s DumpTime, AutomataMinimizationStatistics: 0.3s AutomataMinimizationTime, 54 MinimizatonAttempts, 2190 StatesRemovedByMinimization, 54 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 0.3s SsaConstructionTime, 1.0s SatisfiabilityAnalysisTime, 28.2s InterpolantComputationTime, 1228 NumberOfCodeBlocks, 1228 NumberOfCodeBlocksAsserted, 156 NumberOfCheckSat, 1125 ConstructedInterpolants, 7 QuantifiedInterpolants, 105121 SizeOfPredicates, 49 NumberOfNonLiveVariables, 4819 ConjunctsInSsa, 455 ConjunctsInUnsatCore, 103 InterpolantComputations, 5 PerfectInterpolantSequences, 0/364 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